Journal of a Voyage to the East Indies, in the Ship Grenville, Captain Burnet Abercrombie, in the Year 1775. By Alexander Dalrymple, Esq. F. R. S. Communicated by the Honourable Henry Cavendish, F. R. S.

EXPLANATION OF THE COLUMNS. 1st, THE date (a). 2d, The height of the thermometer, according to FAHRENHEIT's thermometer belonged to Mr. RUSSELL, and hung in the open air in the balcony. 3d, including four columns, contains the register of the marine barometer which, as well as the thermometers, were made by NAIRNE and BLUNT: the R and D are quicksilver, of the kind usually made by them. That marked S is of quicksilver, and of a lighter fluid, for the purpose of making the alteration visible, which is a very great convenience at sea; a quicksilver thermometer being used for the sake of correcting its height, the heat by which is set down in marked Th. next to that marked S. 4th, The weather and winds in four lines; 1st line from noon to 6 p.m.; 2nd, from 6 p.m. to midnight; 3rd, from midnight to 6 a.m.; 4th, from 6 a.m. to noon. In the column of weather, f. denotes fair; sq. squally; c. cloudy; h. hazy; b. hard rain; sr. small rain; dr. r. drizzling rain; fh. showers; th. thunder; l. lightning. It is proper to remark, that the winds are set down according to the compass, allowance for the Variation. 5th in 2, The difference between the daily alteration of latitude by account; N. denoting that the observation was to the Northward of the account; was to the Southward (b). (a) Here, for want of room, the day of the month only is expressed; but in the original journal the days of the Moon, are also inserted. (b) Next to these columns in the original journal are the following, which are left out here only for want of space: Correct course, lee-way variation &c. allowed, and the different courses reduced to one straight course. Distance on that straight course. Difference of latitude by account, Difference of latitude by observation, The departure, The difference of longitude by account, The difference of longitude by the time-keeper, in minutes of a degree. THE COLUMNS. According to FAHRENHEIT's scale. This register of the marine barometers, all of marked by NAIRNE and BLUNT: those marked That marked S is compounded purpose of making the alterations more a quicksilver thermometer being fixed to by which is set down in the column 1st line from noon to 6 p.m.; 2d, from 4th, from 6 A.M. to noon. squally; c. cloudy; h. hazy; r. rain; hr. powers; th. thunder; l. lightning. own according to the compass, without any deration of latitude by account and obser- the Northward of the account; S. that it ed; but in the original journal the days of the week, and which are left out here only for want of room: courses reduced to one straight course. minutes of a degree. 6th in a, The difference between the time-keeper; W. denoting that the long- account; E. that it was to the Eastward. The result of those differences in- error in the course failed, or distance run from what it really was. 7th, The longitude from Greenwich, in 1st, The longitude by account. ad, The longitude by the time-keeper his late improvements. 3d, The difference between the long- and from the time-keeper uncor- East of c; w. denoting time-keeper keeper not to be liable to any precision with which the observ- stances of weather and of the ship. 4th, The longitude by observation adjusted, by the log, to the noon- 5th, The number of sights or dis- 6th, The object whose distance from * the Star; S. Spica Virginis; R. F. Fomalhaut; An. Antares. 7th, The extreme difference between minutes of a degree; when the above is taken, otherwise the next. 8th, The latitude in two columns: 1st, The latitude by account, carry- longitude by account. * D d d 2 The difference between the daily alteration of longitude by the account and W. denoting that the longitude by the time-keeper was to the Westward of that it was to the Eastward. The result of those differences indicates the daily effect of current; however an average course failed, or distance run by log, would make the current appear different from what it really was. The longitude from Greenwich, in seven columns. The longitude by account. The longitude by the time-keeper, which was made by Arnold, but without any late improvements. The difference between the longitudes deduced from observations of the Moon from the time-keeper uncorrected; E. denoting the time-keeper to be to the East of C; W. denoting time-keeper to West of C. This, admitting the time-keeper not to be liable to any sudden changes in its rate of going, indicates the precision with which the observations of the Moon may be relied on, all circumstances of weather and of the ship's motion considered. The longitude by observations of the Moon's distance from the Sun or Stars, adjusted, by the log, to the noon nearest the time of observation. The number of sights or distances observed. The object whose distance from the Moon was observed; O denoting the Sun; R. the Star; S. Spica Virginis; R. Regulus; A. Aldebaran; At. Atair; P. Pollux; T. Comalhaut; An. Antares. The extreme difference between the highest and lowest observation; expressed in minutes of a degree; when the seconds amount to more than 30, the next minute above is taken, otherwise the next minute below. The latitude in two columns: The latitude by account, carried on from the land, in the same manner as the longitude by account. 2d, The latitude by observation; and where the latitude could not be observed by observation, it is deduced by account from the last observation, in which it is included within [ ]. 9th, The correct longitude from Greenwich deduced from the time-keeper, by the sight of lands, whereof the longitudes are known, and by observations of taking a mean of the several observations of the Moon made within a short period other. The error of the time-keeper, between the longitude corrected by sight observations of the Moon, is supposed to have arisen by the time-keeper having rate of going uniformly between these observations; and the intermediate longitudes determined by the time-keeper on this supposition. Where no observations were made, it is deduced by the account from the last observation of the longitude is then included within [ ]. 10th, The magnetical observations of the variation and dip, in seven columns: 1st, The variation by azimuth, * before, denoting the observation to have been in the morning; * after, denoting the observation to have been in the evening. The variation was observed by the official compass belonging to the ship. 3d, The dip with the face of the instrument to the East. 4th, Ditto, ditto, ditto, West. 5th, The mean dip of the foregoing observations. 6th, The mean corrected, or what is supposed to be the true dip. 7th, The circumstances under which the observations of the dip were made. 12th, The miles run by log. The dip was observed with a dipping-needle belonging to the hon. Mr. Sisson. The following remarks on the dipping-needle and observations are by Mr. C. A. The ends of the axis of the dipping-needle are made conical, and turn in a ring of bell-metal, in the manner of Mr. Lorimer's needle, described in Phil. Trans. vol. LXVI. p. 396. The dip was constantly observed both with the face of the instrument to the East and to the West, and the poles were changed twice during the voyage, in order whether the needle continued well balanced. The use of this method of observation is explained in Phil. Trans. vol. LXVI. p. 396. The mean dip corrected is what is supposed; the correction is as follows. By the observations on July 12th, when the marked end of the needle was too heavy, and too low at that place; and therefore, if we suppose the error in the dip to be strong in all parts of the earth, the error will be 1/6th of a degree as the cosine of the dip. The poles were changed at Suez, agree with all the observations the marked end of the needle was altered; and all that part of the voyage subsequent to that alteration. \[ \begin{align*} \text{of a degree from the mean dip,} \\ \text{when the mean dip is between} \\ \end{align*} \] But as before the needle left London, there was a difference in the dip, the correction in that case is great, *videlicet*; \[ \begin{align*} \frac{1}{8} & \quad \text{of a degree is subtracted from the dip, when that} \\ \end{align*} \] The dip was observed on board the Grenville, in the part of the ship in which the observation was made more than 5' from that observed with the needle about five miles distant; so that the observation was much influenced by the iron-work of the ship. The mean dip corrected is what is supposed to be the true dip. The foundation of this supposition is as follows. Observations on July 12th, when the poles were changed, it appears, that the end of the needle was too heavy, so as to make that end point \(\frac{1}{16}\)ths of a degree from that place; and therefore, if we suppose that the force of magnetism is equally distributed over all parts of the earth, the error produced thereby in other places should be to the degree as the cosine of the dip to the radius. The observations also made when the poles were changed at Suez, agree well enough with this supposition: therefore, as in those observations the marked end of the needle pointed to the North, the mean dip in the part of the voyage subsequent to July 12th is corrected by subtracting \[ \begin{align*} \text{degree from the mean dip,} & \quad \begin{cases} 63^\circ \text{ and } 52^\circ \\ 52^\circ \quad 43^\circ \\ 43^\circ \quad 30^\circ \\ 30^\circ \quad 0^\circ \end{cases} \\ \text{when the mean dip is between} & \quad \begin{cases} 70^\circ \text{ and } 62^\circ \\ 62^\circ \quad 52^\circ \\ 52^\circ \quad 43^\circ \\ 43^\circ \quad 35^\circ \\ 35^\circ \quad 30^\circ \\ 30^\circ \quad 25^\circ \\ 25^\circ \quad 0^\circ \end{cases} \end{align*} \] North, and adding as much when the dip is as much South. Before the needle left London, changing the poles was found to make very little difference in the dip, the correction in the preceding part of the voyage is made not so great; It was observed on board the Grenville at Deptford, after her return, in the same ship in which the observations were usually made, and was found not to differ much from that observed with the same needle in a pretty large garden in London, two miles distant; so that the observations on board the Grenville seem to be not much influenced by the iron-work of the ship. A Journal | Th. | Marine Barometer | Weather and Winds | D.L. | D.L. | Longitude | |-----|------------------|-------------------|------|------|-----------| | | R. S. Th. D. | | N | S | W E | | 1775| | | | | | | Apr.| In.Dec. In.Dec. | | | | | | 28 | | | | | | | 29 | | | | | | | 30 | | | | | | | May | | | | | | | 1 | | | | | | | 2 | | | | | | | 3 | | | | | | | 4 | | | | | | | 5 | | | | | | | 6 | | | | | | | 7 | | | | | | | 8 | | | | | | --- **Journal of a Voyage to The East-Indies, in the Ship** --- **Weather and Winds:** - **SE. ESE. S by E. E by S. ESE. SE.** - **SW by S. WSW W.** - **WNW. NW by W.** - **NNW. NW by N. NW.** - **NW by N. NW by W. WNW.** - **NW by W. NW.** - **W. WSW. W by S.** - **WSW. SW by W.** - **SW by S. SW. W by S.** - **W. WNW.** - **NW by W. WNW. NW by W.** - **NW by N. C.** - **C.** - **C. E.** - **E. E by N.** - **ENE.** - **ENE.** - **ENE. V.** - **NE. V. C.** - **C. W by S.** - **W. WSW. SW.** - **SW. WSW.** - **W by S. WSW. NE by N.** - **N. NNE.** - **NNE. NE. ENE.** - **ENE. ESE. E by N.** - **E by N. E by S.** - **ESE.** - **E.** - **E.** - **E. E by N. ENE.** - **NE by E. NNE.** - **NNE.** - **NNE. NE.** | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |--------------------------|----------|------------|----------| | D.L. A.O. | D.L. A. T.K. | A. TK. | D. D T.K. | S. O. D. | E. | Az. | Amp. | Face | Dip | | NS WE | °W°W°W°W | °N°N°W°W | 49.43 49.5° | 5.35 | 72.4 72.4 | 73.6 73.7 | 73.1 73.1 | | 6 7 | 6.19 6.12 | 49.25 49.19 | 6.12 | 73. 74. | 73.4 | | | 11 14 | 6.40 6.19 | 48.42 48.25 | 6.19 | 72. 73.4 | 72.6 | | | 9 33 | 7.22 7.34 | 48.51 48.43 | 7.34 | 72.4 73. | 72.6 | | | 31 9 | 7.29 | 48.34 [48.26] [7.41] | 72. 72.4 | 72.2 | | | 7.57 8.18 | 47.51 47.20 | 8.18 | 71.4 72.6 | 72.1 | | | 13 7 | 7.13 7.27 | 46.56 46.12 | 7.27 | 71. 72.4 | 71.6 | | | 19 12 | 8.36 8.38 | 45.58 44.55 | 8.38 | 18.42* | 71. 72. | 71.4 | | | 21 4 | 10.13 10.19 | 44.14 42.50 | 10.19 | 69.6 71. | 70.3 | | | 39 13 | 10.22 10.43 | 10.40 10.29 | 40.9 40.3 | 68.4 69.2 | 68.7 | | | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD. | C.D. | N.B. Log-line 51 feet to 29'3" | | E. | W. | | | | Between Ram-head and the Lizard. | | 72.4 | 73.6 | 73.1 | 73.1 | 37 | Lizard Point ENE = ENE N. 7 or 8 leagues off shore. | | 72.4 | 73.7 | 73.1 | 73.1 | | At 1 P.M the Lizard Point bore by compass ENE N. Variation allowed ENE N 7 leagues. The Land's End N by ENE NbyW. Take a departure from the Lizard in 49° 57' 30" N lat. Long. 5° 15' W. First and middle part, lights airs and calm. Latter, pleasant breezes. Great swell from W. | | 73.4 | 73.4 | 73.4 | Great swell. | 51 | Light breezes; great swell from Westward. | | 72.4 | 73.4 | 72.6 | 72.6 | 47 | Major past light breezes; great swell from Westward. | | 72.4 | 73.4 | 72.6 | 72.6 | | Mostly calm. A very large swell from Westward. | | 71.4 | 72.6 | 72.1 | 72.1 | 48 | Light breezes and a great swell. | | 71.4 | 72.4 | 71.6 | 71.6 | 68 | First part, calm. Middle, an increasing breeze from Westward, with rain. Latter, a fine breeze from the Northward. | | 18.42* | 71.4 | 71.4 | 71.4 | 83 | Mostly light breezes, with a swell from NW. | | 69.6 | 71.4 | 70.3 | 70.3 | 126 | An increasing gale from the Eastward. | | 68.4 | 69.2 | 68.7 | 68.6 | 142 | First part, fresh gales. Latter, moderate. | * D d d 3 | Th. | Marine Barometer | Weather and Winds | D.L. | Longitu | |-----|------------------|-------------------|------|---------| | | R. S. Th. D. | In.Dec. In.Dec. | N S W E | A. | | May | | | | | | 9 | 67 | 30.1¼ 67 | f. | NNE. | | | | | f. h. | NNE. | | | | | h. | NNE. E by S. | | | | | h. | E by S. V. | | 10 | 68 | 30.0½ 67¾ | h. | ENE. NE. V. | | | | | h. | V. N by E. | | | | | h. | N. V. | | | | | h. | V. SE by E. ESE. SE. | | 11 | | | f. | SE by S. C. | | | | | f. | C. ENE. E. | | | | | f. h. | E. NE by E. C. | | | | | h. | V. C. | | 12 | 67½ | 30.3¾ 67½ | h. | NW by W. WNW. NW. | | | | | h. c. | NW by W. | | | | | f. h. | V. NW by W. | | | | | h. | NW by W. C. W by N. W. | | 13 | 66¼ | 30.1 30.0¾ 66 | f. | W by S. WNW. | | | | | f. h. | WNW. NW by W. NW. | | | | | h. | NW. NW by N. | | | | | c. | NNE. N. | | 14 | 65 | 30.2½ 30.2¼ 65¼ | fq. h.| NE by N. | | | | | h. | NNE. N. | | | | | fq. c.| N. | | | | | c. | N. NNE. | | 15 | 67¾ | 30.2 67½ | h. | NNE. | | | | | f. c. | NNE. NE by N. | | | | | fq. c.| NE by N. NE. W by N. | | | | | c. | WNW. C. W. | | 16 | 65½ | 30.1½ 30.1½ 65½ | c. | W. | | | | | c. | W. V. NE by E. | | | | | c. | NE by E. E by N. | | | | | h. | E by N. | | 17 | 67½ | 30.1¾ 67¾ | h. | NE. | | | | | h. c. | NE by E. | | | | | c. | E by N. E by S. | | | | | c. | E by N. ESF. | By acc from Madeira in [16.50] 16.56 | Longitude from Greenwich | Latitude | Cor. Long. | Variation | Dip | |--------------------------|----------|------------|-----------|-----| | D.L. A.O. T.K. | S O.D. | Az. Amp. | Face E. W. | MD. | | N S W E | A. T.K. | N S W E | N S W E | N S W E | N S W E | N S W E | N S W E | N S W E | | 11 13 | 10.34 | 10.42 | 10.55 | 3 | 36 | 40.17 | 38.24 | 10.42 | 18.0* | 17.43* | 67.6 | 69. | 68. | | 4 19 | 11.7 | 11.34 | 39.26 | 37.33 | 11.34 | 20 | 38* | 18.36* | 67.2 | 68.4 | 67. | | 10 9 | 11.28 | 12.4 | 39.3 | 37.0 | 12.4 | 20.9* | 19.57* | 66.6 | 67.6 | 67. | | 16 4 | 11.52 | 12.24 | 38.28 | 36.9 | 12.24 | 65.6 | 67.2 | 66. | | 21 9 | 12.35 | 13.16 | 37.46 | 35.6 | 13.16 | 20.17* | 20.38* | 66. | 67. | 66. | | 20 8 | 15.0 | 15.33 | 36.36 | 33.30 | 15.33 | 19.28* | 19.16* | 64.6 | 65.6 | 65. | | 25 14 | 15.59 | 16.46 | 35.50 | [32.24] | 16.46 | 64.2 | 65.6 | 65. | | 2 | 7 | 16.41 | 31.18 | 31.20 | 16.41 | 63.2 | 64.6 | 64. | | 18 2 | 17.3 | 16.50 | 29.57 | 29.41 | 16.50 | 62.2 | 63.6 | 63. | By acc. from Madeira in [16.50] | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD | C.D. | | | | | E. | W. | | | | 18.0* | 17.43* | 67.6 | 69. | 68.3 | 68.2 | Very steady. | | 20 38* | 18.36* | 67.2 | 68.4 | 67.7 | 67.6 | Good deal of motion. | | 20.9* | 19.57* | 66.6 | 67.6 | 67.2 | 67.1 | Ship yawing. | | 65.6 | 67.2 | 66.4 | 66.3 | Ditto, needle very steady. | | 20.17* | 20.38* | 66. | 67. | 66.4 | 66.3 | Ditto, needle very unsteady, bad observation. | | 19.28* | 19.16* | 64.6 | 65.6 | 65.2 | 65.1 | | | 64.2 | 65.6 | 65.4 | 64.7 | Very steady. | | 63.2 | 64.6 | 64. | 63.7 | | | 62.2 | 63.6 | 63. | 62.7 | | Decreasing breezes. Changed log-line 48 feet to 29°. Most part light airs. Several small land birds; two of them, supposed nightingales came on board, very tired; also saw a hawk. Light airs of wind Easterly, with calms. Some swallows and other land birds, who seem very tired. In the afternoon, during the calm, when the ship's head was to the Southward, there was, for a little time, a counter current visible; it made like a wake on the ship's larboard beam, as if she was going broadside foremost. Light airs of wind throughout. P.M. saw two three-mast vessels with lateen sails; they were supposed to be Barbary cruisers, but did not come near enough to let us know what they were. Some swallows about the ship. An increasing breeze from the Northward. In the morning there were many petrels in the ship's wake: they continued throughout the day. Fresh breezes, with some squalls. At noon saw Porto Santo from the mast-head, W by S. per compass. In Funchal road. Major Sears informed us, that Mr. Sears, in consequence of our request, tried the therm. for 30' in a cool cellar, and found it 68°. N.B. Captain Alcock informed me, he observed the therm. on May 14, 1776, at 6 A.M. at Funchal 68°, and in the cellar 61°; and Mr. Sears wrote to Mr. Cavendish, that on the 16th of May the therm. which stood at 69°, was carried down at 1 P.M. to a cellar, where it remained till 4 o'clock, and then was found to be at 62°, so that Major Sears's account was probably erroneous. First part, light airs. Middle and latter, pleasant breezes and smooth weather; several boats came off from Funchal. These 24 hours pleasant breeze from Eastward. | Th. | Marine Barometer | Weather and Winds | Longitude | |-----|------------------|-------------------|-----------| | | R. S. Th. D. | | | | May | | | | | 18 | 69 | In.Dec. In.Dec. | | | | 30.2 | 30.1½ 68½ 30.2 | | | | | h. ENE. | 15 | | | | h. ENE. E. | 10 | | | | h. E. ENE. | | | | | h. E. ENE. | | | 19 | 68 | In.Dec. | | | | 30.2½ 30.2¼ 67¾ | 30.2¼ | | | | | h. E by N. | 6 | | | | h. NE by N. | | | | | h.c. N by W. C. | | | | | c.f. N by W. NNE. | | | | | NNE. | | | 20 | 68 | In.Dec. | | | | 30.1½ 30.1½ 68 | 30.1¼ | | | | | c. NNE. NE. | 24 | | | | c. NE. N by E. | | | | | c. NE by N. N by E.| | | | | c. N by E. NNE. | | | | | c. NNE. | | | 21 | 68½ | In.Dec. | | | | 30.1½ 30.1½ 68 | 30.1½ | | | | | f.c. NE by N. | 1 | | | | c. N by E. N by W.| | | | | c.f. N by W. N by E.| | | | | f. N by E. NNE. | | | 22 | 70 | In.Dec. | | | | 30.1½ 30.1¼ 70¼ | 30.1½ | | | | | f.c. N. NNE. | 18 | | | | c. NNE. | | | | | c. NNE. NE by N. | | | | | i. NE. NE by N. | | | | | f. NE by N. | | | | | f. NE by N. | | | | | f. NE by N. NE. | | | 23 | 68 | In.Dec. | | | | 30.2 | 30.1¼ 68 30.2 | | | | | f. NE. NE by N. | 14 | | | | f. NE by N. | | | | | f.c. NE by N. | | | | | c.h. NE by N. | | | | | h. N by E. | | | | | h. N by E. | | | | | h. N by E. | | | | | h. NNE. | | | 24 | 68½ | In.Dec. | | | | 30.1 | 30.0½ 68½ 30.0¾ | | | | | f. NE by N. | 8 | | | | f.c. NE by N. | | | | | c.h. NE by N. | | | | | h. N by E. | | | | | h. N by E. | | | | | h. N by E. | | | | | h. NNE. | | | 25 | 71½ | In.Dec. | | | | 30.0 | 29.9½ 72 29.9½ | | | | | h. NE by N. | | | | | h. V. WNW. NW. | | | | | h. NW. V. NNE. | | | | | h.c. NNE. E by S. ESE. | | | 26 | 76½ | In.Dec. | | | | 30.0½ 30.0 76½ | 30.0 | | | | | h. NE by N. | | | | | h. V. WNW. NW. | | | | | h. NW. V. NNE. | | | | | h.c. NNE. E by S. ESE. | | | Longitude from Greenwich | Latitude | Cor. Long. | Variation | Dip | |--------------------------|----------|------------|-----------|-----| | | | | Az. Amp. | Face | | | | | | E. W. | | | | | | MD. | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, 1775, kept by AL... | Variation | Dip | |-----------|-----| | Az. | Amp. | Face | MD. | C.D. | | E. | W. | T.S. denotes the temperature of the sea-water taken up in a bucket about noon, and the thermometer immersed in this bucket for some minutes. 53 Light breezes and smooth water At noon, Peak of Tenerif S 50° E. Pleasant breezes from the Eastward. At noon, Peak of Tenerif (variation allowed) bore N 24° 36' E., which bearing, and the difference of latitude places it 27° to the Eastward of our situation at noon, when in 16° 55' long., by time-keeper, and consequently by time k. 16 28 is the longitude of Peak of Tenerif, only 4' less than Percival makes it; but, by the observations of the Moon, on the 21st and following days, it appears, the ship was 1° farther West than the time-keeper represented, which difference arose since the 9th of May, if the Lunar observations were to be relied on. 70 Light breezes and smooth water throughout. Several petrills in the wake. 106 Pleasant trade. In Captain Exeter's chart there being foundings laid down not far to the Eastward of our situation, founded at 8 P.M. but had no ground 40 fath. Several petrills in the wake of ship. 87 Light breezes with smooth water throughout. Many petrills. N.B. There was apparently an error in this day's log, by time-keeper. The succeeding days diff. long. was as much less as this day's was more than account. I have here corrected it as conformable to the Lunar observations. T.S. 69°. 115 In the evening, the water appeared of a muddy green, like foundings; but did not found. An increasing trade with fair weather, the water continuing of same colour. T.S. 69°. 153 These 24 hours a fresh trade, and mostly fair weather, the water remaining the same as before. T.S. 68°½. 150 Fresh trade and hazy weather. In the afternoon the sea remarkably confused, breaking different ways. Sounded in the morning, but had no ground 40 fath. In the morning the water appeared blue again. T.S. 71°. Light breezes chiefly. In the night, no ground 70 fath. There were many blubbers in the ship's wake, which made a very luminous appearance; they seemed in shape like a sausage about 8 or 9 inches long. In the day, tea was covered with Portuguese men of war, of which took up several; also some pilot-fish and skip-jacks. T.S. 74°. * D d d 4 | Th. | Marine Barometer | Weather and Winds | D. L. A. O. T. K. | Longitude | |-----|-----------------|------------------|-----------------|-----------| | | R. S. Th. D. | In. Dec. | N S W E | A. | | 1775| | | | | | May | 27 | 76½ 30.0¼ 30.0 | h. SE by E. | / / / / | | | | | h. c. V. E by N.| 7 4 | | | | | c. h. E by N. V.| | | | | | h. V. NNW. NE. | | | | 28 | 78½ 30.0 30.0 | f. NNE. N. | 1 3 | | | | | f. N. NW by N. | | | | | | f. h. NW by N. | | | | | | h. NW by N. NWNW.| | | | 29 | 80 30.1 30.1¼ | h. W. | 2 8 | | | | | h. C. SW. SW by W.| | | | | | h. SW by W. C. | | | | | | h. SW. SW by W. ESE. ENE.| | | | 30 | 77½ 30.0¾ 30.0¾ | h. ENE. NE. V. W by S.| | | | | | h. SW by W. C. | | | | | | h. C. W. C. | | | | | | h. NW by N. NNW. N by W.| | | | 31 | 80 30.0½ 30.0 | f. NNW. | 1 10 | | | | | f. fq. hr. NW. NW by W. E.| | | | | | fq. hr. c. h. E. C. ENE. E by S.| | | | | | h. f. NE. | | | June| 1 | 82½ 30.1 30.1 | f. NNE. N. NNW.| 10 10 | | | | | f. SW by W. W. | | | | | | f. c. h. V. C. | | | | | | h. c. fq. h. NW. SE by E. SE.| | | | 2 | 82½ 30.0¾ 30.0¾ | h. SE. W. | 17 16.25 | | | | | h. W. C. W. | | | | | | h. W. C. WNW. W by N.| | | | | | h. W by N. | | | | 3 | 82½ 30.0¼ 30.0¼ | h. NW. | 8 6 | | | | | L. to E. fq. r. c. NW. NW by N. E. V.| | | | | | c. L. to E. V. S by W. V. E by S. ESE.| | | | | | h. f. E by S. E. ESE.| | | | 4 | 81½ 30.0¼ 30.0¼ | f. SE. SSE. SE by S. SSE. S by E.| | | | | | c. L. all round, fq. SSE. S by E. S by W.| | | | | | fq. SSW. C. | | | | | | fq. c. C. NNW. | | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, 1775, kept by | D.L. | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | Dip | |------|------|--------------------------|----------|------------|-----------|-----| | A.O. | T.K. | A. | T.K. | D. | S. O. E. | A. | O. | Az. | Amp. | Face | MD | | N | S | W | E | W | N | N | W | W | 46. | 46.4 | 46. | | 7 | 4 | 18.18 | 18.2 | E | W | 15.32 | 13.48 | 18.26 | 13.0* | 44.4 | 45. | | I | 3 | 17.26 | 17.7 | E | W | 14.28 | 12.45 | 17.34 | 12.37* | 12.44* | 43.6 | 44. | | 2 | 8 | 17.16 | 16.49 | E | W | 13.57 | 12.12 | 17.19 | 12.37* | 12.44* | 43.6 | 44. | | 2 | 3 | 17.9 | 16.39 | E | W | 13.26 | 11.43 | 17.12 | 12.36* | 12.42* | 41.6 | 42.4 | | I | 10 | 17.4 | 16.44 | E | W | 12.22 | 10.40 | 17.20 | 12.24* | 12.42* | 41.6 | 42.4 | | 10 | 10 | 16.51 | 16.11 | E | W | 11.40 | 10.8 | 16.50 | 13.7* | 12.46* | 41. | 42. | | 17 | 16.25 | 15.45 | E | W | 11.14 | 9.59 | 16.26 | 12.35* | 12.31* | 40.4 | 41.2 | | 8 | 6 | 16.6 | 15.20 | E | W | 10.38 | 9.15 | 16.09 | 12.48* | 12.55* | 38.6 | 39.6 | | 10 | 10 | 16.2 | 15.6 | E | W | 10.23 | 9.10 | 15.58 | 38.4 | 39.2 | 38.4 | S.S.E. S by E. ESE. ENE. N by W. N by S. | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD | C.D. | ML | | E. | W. | - Light airs of wind, variable, with very damp weather. In the night, no ground 40 fath. Many fish about the ship; some under the quarter, darting through the water, and making streaks of light in various directions, had a fine appearance. T.S. 75°. - Light breezes throughout. In the night, lightning to the Eastward. Many luminous blubbers and fish about the ship in the night. Passed several turtle. Had ground at 11 A.M. 32 fath. coarse sand, with black specks and shells. At noon, 30 fath. coarse sand and flat coral. T.S. 75°. - First and latter, light breezes. Middle, calm. Great many fish about the ship, and in the morning vast flocks of birds. Soundings, sand of various kinds from 28 to 17½ fath. at 8 A.M.; at 9 A.M. 21 fath. blue mud; and at 11 A.M. no ground 35 fath. T.S. 77°. - Light airs and calm. At 5 P.M. 56 fath. green mud. At midnight, 45 fath. blue mud. In the night, the water very luminous when put in motion, and many shoals of fish looking like breakers. A.M. a turtle passed; vast flocks of sea birds. At noon, the sea covered with Portuguese men of war, like the ground with leaves in Oct. 23 f. blue mud. T.S. 76°. - Most part pleasant land and sea breezes. At midnight, a hard squall from the land; it was preceded by great deal of lightning over the land, and long threatening before the squall came off. It rose in a dark black cloud, with a white streak like a bow under it, and below this very dark. It came off very hard, and raised the spray of the sea in a foam. P.M. Soundings, 25 to 21 fath. sand. A.M. No ground 60 and 40 fath. T.S. 80°. - Major part, light breezes. P.M. No ground 40 to 80 fath. - First and latter parts, pleasant breezes from Westward. The middle, calm, with hot sultry weather. At midnight, 8c fath. coarse black sand, with bits of coral. At noon, 26 fath. coarse brown sand. T.S. 81°. - Major part, light airs. Many sharks about the ship; above a dozen in sight at once; caught one. P.M. Soundings 27 to 35 fath. At noon, no ground 88 fath. T.S. 80°. - The first part, light breezes of wind from the Southward. The latter, mostly calm, with hot weather. In the evening, the clouds very remarkable; some appearing like dirty wool, and apparently very near all round the horizon; the sky above, in many places, a fine pink, and blueish grey beneath it. In the morning, many grampusses about the ship. At noon, ground 60 fath. T.S. 83°. | Th. | Marine Barometer | Weather and Winds | D.L. | D.L. | |-----|------------------|------------------|------|------| | | R. S. Th. D. | N S W E | A.O. | T.K. | | 1755| In.Dec. In.Dec. | | | | | June| | | | | | 5 | 3½ 30.0½ 30.0½ | h.c. C. W by S. | | | | | | c. L. all rd. r. W by S. WSW. V. NNW. | | | | | | r. h fq. and hr. fq. r. NNW. SE by E. E by S. V. | | | | | | h. V. S by E. SSE. | | | | | | f. C. V. | | | | | | f. L. to Eaftw. SW by W. | | | | | | h fq. r. L. all rd. r. c. E by S. SE. E. E by N. | | | | | | c. f. E by N. C. SSE. S by E. | | | | | | h. SE by S. S by E. C. | | | | | | h.c. V. SSE. SE by S. | | | | | | c. fq. S by W. V. C. | | | | | | fq. c. C. S by E. SSE. S. | | | | | | c. hr. and L. to s.w. S. C. V. SW. | | | | | | fq. c. fq. SW. SW by W. SW. | | | | | | c. C. | | | | | | c. f. C. | | | | | | h. C. | | | | | | h. L. to weftw. C. | | | | | | h.c. C. W by S. | | | | | | c. W by S. | | | | | | f. c. fq. r. W. NNE. | | | | | | fq. r. c. NNE. V. C. | | | | | | c. L. to E. hr. C. V. C. ENE. | | | | | | r. c. ENE. V. SW by W. | | | | | | c. fq. r. SW. SW by S. | | | | | | c. f. c. fq. r. SW. | | | | | | fq. r. SSW. SW. WSW. | | | | | | hr. r. WSW. V. | | | | | | hr. V. SW. | | | | | | fr. r. c. SW. SW by S. SSW. | | | | | | c. r. SSW. C. V. | | | | | | c. C. V. | | | | | | c. WNW. NW. | | | | | | c. L. to weftw. NW. | | | | | | c. NW. NW by N. | | | | | | c. th. L. to SW. V. NNE. | | | 4 | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | Dip | |------|------|------|--------------------------|----------|------------|-----------|-----| | N | S | W | E | N | W | Az. | Amp | | 10 | 20 | 15.43| 14.28 | 9.43 | 8.40 | 15.43 | 38.2 | | 11 | 8 | 15.41| 14.34 | 9.12 | 8.20 | 15.53 | *13.33 | | 11 | 19 | 15.41| 14.53 | 8.56 | 8.15 | 16.16 | 12.28* | | 23 | 12 | 15.22| 14.22 | 8.33 | 8.15 | 15.49 | 36.6 | | 3 | 3 | 15.18| 14.14 | 8.29 | 8.8 | 15.46 | 36.4 | | 3 | 19 | 15.0 | 14.15 | 5 | *8.48 | 8.1 | 7.43 | | 30 | 24 | 14.19| | 7.9 | [7.14] | [14.53] | 34.6 | | 30 | 24 | 14.4 | 12.55 | 13.53 | 3 | *5.39 | 6.53 | | 2 | 13.50| 12.39| 11.5 | 14.34 | 3 | *8.15 | 6.25 | | | | | | | | | 6.37 | | | | | | | | | 14.27 | | | | | | | | | 13.18 | | | | | | | | | 32.4 | | | | | | | | | 32.6 | | | | | | | | | 32.6 | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE; 1775, kept by Mr. J. | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp | Face | MD. | C.D. | E. | W. | | 2577 | Mostly light breezes. Past 2 P.M. a hard squall, with great deal of thunder, lightning, and rain. P.M. a boat came on board from the Polly, a whaling vessel, from Bolton in New England; the vessel was hull down when they came aboard. A.M. spoke with the Mary, Captain Jones, from Liverpool to Sierra Leon. P.M. 40 to 36 fathom coarse sand. A.M. no ground 55 fathom. T.S. 83°. | | 38 | Mostly light airs and calms. At midnight, a violent gust of wind came off; its violence did not continue above a minute or two; but brought much rain, and was attended with thunder and lightning. A.M. no ground 88 fathom. T.S. 82°. | | 31 | Light airs chiefly; a long swell from the SW. T.S. 82°. | | 30 | First, light airs. Middle, fresh breezes and squally. Latter, calm. At midnight, carried away the main and fore-top-mast by the badness of the rigging. Had, for some hours, a pretty fresh SW wind; but not enough to have endangered the top-masts had the rigging been good. At 11 got fore-top-mast up. T.S. 83°. | | 6 | Mostly calm, with swell from Southward. At 9 A.M. got up main-top-mast. T.S. 82°. | | 35 | First, fair. Middle, squally, with hard rain. Latter, variable, with calms. T.S. 81°. | | 64 | Cloudy and rainy, with a gentle breeze; great swell from Southw. T.S. 81°. | | 22 | Calm and cloudy; great long swell from Southward. A.M. a very large shark was struck with the harpoon; but it broke the harpoon, and got off. Many fish and birds. T.S. 82°. | | 31 | Light airs and cloudy through. Many fish and birds. P.M. no ground 70 fathom. A.M. hooked a shark. T.S. 81°. | * D.d d 5 | Th. | Marine Barometer | Weather and Winds | |-----|-----------------|------------------| | | R. S. Th. D. | | | 1775| In.Dec. In.Dec. | | | June| 82½ 30.0½ 30.0½| | | 14 | 82½ 30.0½ 30.0½| | | | c. V. C. | | | | SW by S. SSW. | | | | SSW. SW. | | | | hr. c. r. c. C. V. S by E. | | 15 | 83 30.0½ 30.0½ | | | | h. S by W. S. SSW. | | | h.f. SSW. | | | | c. r. c. SSW. SW. V. | | | c. T. to s.e. V. SW by W. SSW. SW. | | 16 | 82 30.0½ 30.0½ | | | | fig. L. to n.e. S by W. V. C. SW. SW by S. | | | c. SW by S. C. | | | | c. r. c. V. C. V. | | 17 | 79½ 30.0½ 30.0½| | | | fig. r. V. S by W. | | | fig. r. c. V. SSW. | | | c. r. c. SSW. S. SW. | | | c. hr. c. SW by W. WSW. SW by W. | | | c. SW by W. SW. C. W by N. | | 18 | 80½ 30.0½ 30.0½| | | | fig. c. W by N. W by S. V. C. | | | c. C. NE. | | | | c. NE. ENE. | | | 19 | 80½ 30.0½ 30.0½| | | | h. NNE. C. V. | | | | L. to nd. c. V. WSW. | | | c. WSW. W by S. V. | | | c. fr. c. V. C. SW by S. | | | c. SW by S. SSW. SW by S. | | | c. L. fig. r. c. SW by S. SSW. SW by S. SW. SSW. | | | c. SSW. V. S by W. | | | c. S by E. C. SE by S. V. | | 20 | 82 30.0½ 30.0½ | | | | c. S by E. S. SSW. | | | c. L. from n. to s.e. fig. r. SSW. SW by S. SSE. S. | | | r. hr. S. | | | | hr. c. r. S by E. C. | | 21 | 79 30.0½ 30.0½ | | | | hr. C. SSW. V. C. | | | hr. C. ESE. V. | | | | hr. fig. hr. V. SSE. V. | | 22 | 80½ 30.0½ 30.0½| | | | fig. r. V. | | | D.L. | A.O. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | Dip | |------|------|--------------------------|----------|------------|-----------|-----| | N18W | W | 13.20 | 6.5 | 14.6 | Az. | E. | | | | 12.14 | 6.32 | | Amp. | W. | | | | 14.14 | | | Face | MD. | *Note: The table contains various entries with different values and directions, indicating measurements taken during a voyage to the East Indies in the ship Grenville, captained by Burnet Abercrombie in 1775. | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD. | C.D. | E. | W. | | 13.28* | 32.6 | 33.6 | 33.2 | 32.5 | 37 | 2882 | | 13.32* | 32.4 | 32.2 | 31.5 | 54 | Light breezes, with a swell from the Southward. T.S. 82°. | | 31.6 | 32. | 31.7 | 31.2 | 19 | PM. many fish; but swimming very deep. A.M. caught three sharks. Most part light airs and calm with rain. T.S. 81°. | | 30. | 30.6 | 30.3 | 29.6 | 43 | First part, squally, with rain and wind Southerly. The latter, light airs S.W. cloudy and rain. A.M. appearance of land to Eastward under the clouds, but very obscure, being thick and hazy weather. T.S. 81°. | | 29.2 | 30. | 29.5 | 28.7 | 24 | Pleasant weather. A.M. some dolphins. Light airs of wind, variable with calms. T.S. 81°. | | 13.30* | 13.50* | 28.6 | 29.6 | 29.2 | 28.4 | 26 | Light airs, with lightning and some thunder in the night. In the morning, it looked very black, but was not attended with any squall. T.S. 81°. | | 14.23* | 14.41* | 28.6 | 29.6 | 29.2 | 28.4 | 46 | Mostly light breezes and cloudy, with rain. I ascribe the error of this day's log partly to the course having made no allowance for lee-way. T.S. 82°. | | 14.38 | 14.40* | 28.4 | 29.4 | 29. | 28.2 | 44 | First and middle parts, light breezes, with some squalls, and heavy rain. The latter, calm, with cloudy weather and rain. In the morning, at 8 P.M. saw the land, bearing E by S 5 leagues. Sounded 46 fath. mud; but there was the mark of rock on the arming of the lead. At 10 A.M. the extremes of the land from N by E 4 E to E distance about 7 leagues. The N extreme I suppose is Puma Baixai near Selos river, and the Southern extreme supposed about Bora: There was a hill, visible inland, to the left, which was supposed to be that of Raffa. T.S. 81°. | | 27.6 | 28.4 | 28.1 | 27.3 | 35 | At Sun-set, the extremes N 4 E to E 4 S (per compass) distance off shore about 6 leagues. 43 fath. blue mud. Variable winds, with very much hard rain. T.S. 81°. | | Th. | Marine Barometer | Weather and Winds | D.L. | Longitu | |-----|------------------|-------------------|------|---------| | | R. S. Th. D. | | | | | 1775| | | | | | June| | | | | | 23 | 82 | 30.0 | SSE. | S by W. | | | | 29.9 | S by W. | S by E. | | | | 81.4 | S by E. | SSE. | | | | 30.0 | S by W. | S. | | 24 | 80.2 | 30.0 | S by W. | SSW. | | | | 29.9 | S by W. | S. | | | | 80 | S by W. | S. | | | | 29.9 | S by W. | S. | | 25 | 77.4 | 30.0 | S by W. | SSW. | | | | 30.0 | SSW. | | | | | 76.4 | SSW. | | | | | 30.0 | SSW. | | | 26 | 80 | 30.0 | V. SSW. | | | | | 30.0 | SW by S. | | | | | 80 | SW by S. | S by W. | | | | 30.0 | S by W. | | | 27 | 80.4 | 30.0 | SSW. | SW by S. | | | | 30.0 | SSW. | S by W. | | | | 80.4 | S by W. | S. | | | | 30.0 | S by W. | S. | | 28 | 80.4 | 30.0 | S by E. | | | | | 30.0 | S by E. | | | | | 80.4 | S by E. | | | | | 30.0 | S by E. | | | 29 | 79.4 | 30.1 | S by E. | | | | | 30.1 | S by E. | | | | | 79 | S by E. | | | | | 30.1 | S by E. | | | 30 | 78.4 | 30.2 | S by E. | | | | | 30.1 | S by E. | | | | | 78.4 | S by E. | | | | | 30.1 | S by E. | | | July| | | | | | 1 | 77.4 | 30.1 | S by E. | S by E. | | | | 30.1 | S by E. | S by E. | | | | 76.4 | S by E. | S by E. | | | | 30.1 | S by E. | | | 2 | 78.4 | 30.1 | S by E. | SSE. | | | | 30.1 | S by E. | S by E. | | | | 78 | S by E. | | | | | 30.1 | S by E. | | | D.L. | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|------|--------------------------|----------|------------|---------| | A.O. | A.T.K. | TK. | D.D. | TK. | S.O.D. | Az. | Amp. | Face | Dip | | N | S | W | E | A. | TK. | D.D. | TK. | S.O.D. | A. | O. | N | N | W | W | Az. | Amp. | Face | Dip | | 12 | 1 | W | W | W | 11.13 | 9.16 | W | 3 | 0 | 4.32 | 11.6 | W | W | 28. | 28.4 | 28.2 | | 3 | 3 | 11.42 | 9.48 | 2.53 | 4.28 | 11.37 | 28.4 | 29.4 | 29. | | 11.16 | 2.35 | [4.21] | [11.11] | 27.4 | 27.6 | 27.5 | | 21 | 52 | 10.2 | 7.40 | 2.23 | 4.16 | 9.26 | 26.4 | 27.4 | 27. | | 24 | 44 | 10.6 | 7.0 | 2.13 | 3.42 | 8.45 | 25.4 | 26. | 25.6 | | 13 | 2 | 11.10 | 8.2 | 1.34 | 2.50 | 9.45 | 14.42* | *14.11 | 24.4 | 25.2 | 24.7 | | 20 | 39 | 12.18 | 9.48 | 1.0 | 1.56 | 11.29 | 14.37* | *13.44 | 14.25* | 23.6 | 24.4 | 24.1 | | 1 | 77 | 13.21 | 12.8 | 0.14 | 1.11 | 13.48 | 13.6* | *12.7 | 23.6 | 24.4 | 24.1 | | 21 | 76 | 12.35 | 12.38 | 0.16 | 1.34 | 14.17 | 13.17* | 24.6 | 24.4 | 24.5 | | 14 | 62 | 13.33 | 14.38 | 0.22 | 1.10 | 16.16 | 12.41* | 12.47* | 24.6 | 25.4 | 25.1 | | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD. | C.D. | E. | W. | | 28.4 | 28.2 | 27.4 | Very unsteady. | | 28.4 | 29.4 | 29. | 28.2 | | 27.4 | 27.6 | 27.5 | 26.7 | Pretty steady. | | 26.4 | 27.4 | 27. | 26.2 | | 25.4 | 26. | 25.6 | 25. | | 14.42* | 14.11 | 24.4 | 25.2 | 24.7 | 24. | | 14.37* | 14.25* | 23.6 | 24.4 | 24.1 | 23.2 | Very unsteady. | | 13.6* | 12.7 | 23.6 | 24.4 | 24.1 | 23.2 | Pretty steady. | | 13.17* | 24.6 | 24.4 | 24.5 | 23.6 | | 12.41* | 12.47* | 24.6 | 25.4 | 25.1 | 24.2 | N.B. going to Westward increases dip. | | ML | |----| | 3210 | | Moderate breeze. T.S. 8°. | | Most part a fresh gale from Southward, with squalls and rain. T.S. 81°. | | Most part fresh breezes. At 2 P.M. Richard Jones, the surgeon's lad, fell over-board. Hove the ship to, and sent jolly boat and yawl in search of him; but they could not find him. No observation for latitude or time, not having one glimpse of the Sun all the forenoon. P.M. no ground 50 fath. T.S. 80°½. | | A fresh breeze with much rain. P.M. no ground 70 fath. T.S. 80°½. | | Mostly fresh breezes. At 2 P.M. from mast-head land, making like islands, was seen bearing E.by N.—ENFIN, supposed Cape Palmas. P.M. no ground 70 fath. At 3 P.M. spoke with a French ship from Bonaire to the coast of Angola. T.S. 80°. | | Fresh breeze throughout, and a large Southerly swell. T.S. 80°½. | | Fresh breeze throughout. P.M. cloudy. A.M. fair. T.S. 75°½. | | Fresh breezes with fair weather. P.M. many porpoises. Some bottle noses, and vast flocks of flying fish. A.M. a man of war bird. T.S. 76°½. | | Major part moderate and cloudy. T.S. 78°. | | Pleasant breeze, with fair weather and smooth water. T.S. 76°. | * D d d 6 | Th. | Marine Barometer | Weather and Winds | D.L. | Longitude | |-----|------------------|-------------------|------|-----------| | | R. | S. | Th. | D. | N/S | W/E | A. | | July| 3 | 79 | 30.04 | 30.04 | 79 | 30.02 | h. | S by E. S. | | | | | | | | | h. | S by E. SSE. S by E. S by E. | | | | | | | | | c. | S by E. SSE. S by E. SSE. | | | | | | | | | h. | SSE. SE by S. SE. SE by S. | | | | | | | | | h. | SE by S. SE. | | | | | | | | | h. f. | SE by S. | | | | | | | | | c. f. | SE. | | | | | | | | | h. | SE. SE by E. ESE. | | | | | | | | | h. f. | ESE. | | | | | | | | | f. c. f. | ESE. SE by E. | | | | | | | | | f. | SE by S. SE. | | | | | | | | | f. | SE by E. SE. | | | | | | | | | f. c. | SE by E. SE. | | | | | | | | | c. f. r. c. | SE. SE by E. SE by S. | | | | | | | | | c. f. r. | SE by S. | | | | | | | | | c. | SE. SE by S. SE. | | | | | | | | | c. f. | SE by E. SE. | | | | | | | | | f. c. | SE by E. SE. | | | | | | | | | c. f. | SE by E. SE. | | | | | | | | | f. q. r. | SE by E. SE. | | | | | | | | | f. q. | SE. | | | | | | | | | c. | SE. SE by E. SE. | | | | | | | | | f. q. | SE. SE by E. SE. | | | | | | | | | f. q. | SE. SE by E. SE. | | | | | | | | | c. | SE by E. SE. | | | | | | | | | f. | SE. SE by E. | | | | | | | | | f. q. | SE by E. | | | | | | | | | c. f. | SE. SE by E. | | | | | | | | | f. q. | SE. SE by E. SE. | | | | | | | | | f. q. | SE by E. ESE. SE. | | | | | | | | | h. f. q. r. c. | SE. SE by E. | | | | | | | | | c. f. q. | SE. SE by E. SE. | | | | | | | | | f. q. c. | SE. SE by E. | | | | | | | | | c. f. | SE by E. SE. | | | | | | | | | h. | SE. | | | | | | | | | h. f. | SE. SE by E. | | | | | | | | | f. c. | SE by E. | | | | | | | | | c. f. | SE. SE by E. | D.L. A.O. T.K. W 14.56 15.44 16.4 16.49 17.39 18.42 19.45 20.37 21.42 22.29 | Longitude from Greenwich | Latitude | Cor. Long. | Variation | North Dip. | |--------------------------|----------|------------|-----------|------------| | D.L. A.O. T.K. | S.O.D. | Az. Amp. | Face E.W. | MD. | | N.S.W.E | A.T.K. | D.C.T.K. | S.O.D. | A.O. | | W.W.E.W | S.N.W.W | 18.13 | 11.37* | 24.2 24.6 24.4 | | 3 35 | 14.56 | 16.36 | 2.13 | 1.8 | 19.29 | 10.31* | *9.0 | *8.40 | 22.2 22.6 22.4 | | 14.30 | 15.44 | 17.55 | 3.28 | 2.21 | 20.3 | 8.59* | *8.32 | 8.59* | 19.6 | 20.6 | 20.2 | | 2 15 | 16.4 | 18.30 | 93 | 20.3 | 4 | 0 | 26 | 4.56 | 3.37 | 21.20 | 8.37* | 8.54* | 19.2 | 20.2 | 19.6 | | 12 29 | 16.49 | 19.44 | 6.22 | 5.17 | 22.20 | 7.52* | 7.49* | 15.4 | 16.2 | 15.7 | | 14 8 | 17.39 | 20.42 | 8.1 | 7.10 | 23.20 | *6.26 | *6.33 | 11. | 12.6 | 11.7 | | 3 14 | 19.45 | 22.29 | 9.45 | 8.57 | 24.11 | | | 7.2 | 8.4 | 7.7 | | 5 21 | 20.37 | 23.0 | 11.33 | 10.50 | 24.44 | 5.44* | 5.32* | 3.6 | 5.0 | 4.3 | | 8 21.42 | 23.57 | 13.7 | 12.24 | 25.43 | *4.0 | | | 2.2 | 2.4 | 2.3 | | 1 4 | 22.29 | 24.40 | 14.48 | 14.6 | 26.28 | 4.15* | 4.20* | 1.4 | 1.2 | 1.3 | South... | Variation | North Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | MD | C.D. | | E. | W. | | 11.37* | 24.2 | 24.6 | 24.4 | 23.5 | | *9.0 | *8.40 | 22.2 | 22.6 | 22.4 | 21.5 | Very steady. | | 8.59* | 8.59* | 19.5 | 20.6 | 20.2 | 19.3 | Extremely steady. | | 8.37* | 8.54* | 19.2 | 20.2 | 19.6 | 18.7 | Great swell. | | 7.52* | 7.49* | 15.4 | 16.2 | 15.7 | 15.1 | Very great swell. | | *6.26 | *6.33 | 11. | 12.6 | 11.7 | 11. | | 5.44* | 5.32* | 3.6 | 5.0 | 4.3 | 3.4 | Ditto, but great swell. | | *4.0 | 2.2 | 2.4 | 2.3 | 1.4 | Not steady. | | 4.15* | 4.20* | 1.4 | 1.2 | 1.3 | 2.2 | Pretty steady. | | South Dip. | |------------| | 4.942 | Pleasant trade wind. Swell very much abated. A.M. saw a bird, supposed to be a shearwater. Mr. Roberts saw a man of war bird. T.S. 75°. | | Th. | Marine Barometer | Weather and Winds | D.L. | A.O. | T.K. | Longitude | |-----|------------------|------------------|------|------|------|-----------| | | R. S. Th. D. | In.Dec. In.Dec. | | | | | | July| | | | | | | | 13 | 76 | 30.2 30.2 | SE by E. SE by S. SE by E. | 2 | 6 | 23.3° W | | | | | E by S. SE. | | | | | | | | SE. SE by S. SSE. | | | | | | | | SE by S. S by E. SSE. | | | | | 14 | 76 | 30.3 30.3 | SE by S. SE. | 3 | 9 | 24.27° | | | | | SE by E. SE by S. | | | | | | | | SE by S. SE. | | | | | | | | SE. SE by E. SE. | | | | | | | | SE. SE by S. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE by E. SSE. V. | | | | | | | | SE. SE by E. | | | | | | | | SE by E. ESE. | | | | | | | | E by S. SE by E. E by S. SE by E. | | | | | | | | SE. ESE. | | | | | 15 | 76 30.2 30.2 | 76 30.2 | SE by E. V. SSE. V. ESE. | 2 | 5 | 26.2° | | | | | SE by E. V. SE. | | | | | | | | SE by E. V. | | | | | | | | SE. E by S. ESE. | | | | | | | | SE by E. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE. E by S. ESE. E by S. | | | | | | | | ENE. | | | | | | | | V. ESE. | | | | | | | | V. C. NE. V. | | | | | | | | C. N. V. N. | | | | | 16 | 74 30.3 30.3 | 74 30.2 | SE by E. ESE. | 1 | 1 | 25.42° | | | | | E by S. SE by E. E by S. SE by E. | | | | | | | | SE. ESE. | | | | | 17 | 73 30.4 30.3 | 73 30.3 | SE by E. V. SSE. V. ESE. | 2 | 5 | 26.2° | | | | | SE by E. V. SE. | | | | | | | | SE by E. V. | | | | | | | | SE. E by S. ESE. | | | | | | | | SE by E. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE. E by S. ESE. E by S. | | | | | | | | ENE. | | | | | | | | V. ESE. | | | | | | | | V. C. NE. V. | | | | | | | | C. N. V. N. | | | | | 18 | 75 30.4 30.3 | 75 30.3 | SE by E. SE. | 8 | 4 | 26.29° | | | | | SE by E. SE. | | | | | | | | SE by E. SE. | | | | | | | | SE. E by S. ESE. E by S. | | | | | | | | ENE. | | | | | | | | V. ESE. | | | | | | | | V. C. NE. V. | | | | | | | | C. N. V. N. | | | | | 19 | 73 30.4 30.3 | 73 30.3 | SE by E. ESE. | 26.12° | | | | | | | ENE. | | | | | | | | V. ESE. | | | | | | | | V. C. NE. V. | | | | | | | | C. N. V. N. | | | | | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|------|------|--------------------------|----------|-----------|---------| | N | S | W | E | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, 1775, kept by | Variation | Dip | ML | |-----------|-----|----| | Az. | Amp. | Face | MD. | C.D. | E. | W. | MD. | | 37° | *2.43 | *2.42 | 3.4 | 3.4 | 3.4 | 3.4 | 4942 | | 1.48* | 1.36* | 5.2 | 5.4 | 5.3 | 6.2 | Not very steady. | | 1.45 | *1.45 | *1.49 | 7.4 | 8. | 7.6 | 8.5 | Pretty steady. | | 0.42* | 9.2 | 9.6 | 9.4 | 10.3 | Pretty steady. | First part, fresh gales and squally. Latter, moderate and fair. A.M. Fog Bank exactly like an island; the outline perfectly well defined, except the extremities; I never before saw any cloud so like land. T.S. 74°. Changed the poles of the dipping-needle. Mean of the various trials changed and re-changed 3½ S. viz. | E. | W. | MD. | |----|----|----| | 4.4 | 4 | 4.2 | | 2.6 | 3 | 2.7 | | 4.4 | 4.6 | 4.5 | | 2.4 | 2.4 | 2.4 | Mean 10° Constant trade wind. T.S. 74°. First part, moderate. Middle, hard squalls and rain. T.S. 74°. A.M. saw a bird like a booby, but shorter winged and necked, called by Tailors, poor John. Light breezes, swell much abated. T.S. 74°. P.M. to the N.E., the clouds very remarkable, being in white curved rays, like the variation chart. At A.M. saw Trinidadada from mast-head SSE. At 9 visible from deck. At noon, Trinidadada S 36° E 11 leagues. Major part, moderate breezes and cloudy weather; winds variable and unequal water. By the bearings of Trinidadada at noon, allowing it to lie in 20° 27' S according to Dr. Halleys. Its longitude per T.K. 28.13 W 28.13 Mean diff. T.K. and P 8 obf. O 1.58 8 obf. O 2.12 Long. 8 obf. O and P 1 obf. O At 30.11 8 obf. O & P 30.5 By Dr. Halleys Diff. 29.50 T.S. 74° At Sun-set, Trinidadada E by S 3° S 8 or 9 leagues. T.S. 76° Moffly light breezes and cloudy. T.S. 74°. * D d d 7 | Date | Marine Barometer | Weather and Winds | |------|------------------|-------------------| | | R. S. Th. D. | In.Dec. | | July | 20° 75 30°4 30°3½ | f. C. | | | | f. C. NE. | | | | f.c.f. C. V. | | | | f. E. ENE. | | | | f. C. ENE. | | | | f.c. ENE. E by N.| | | | c.h. E by N. ENE.| | | | h.c. ENE. NE. | | | | f. NE. | | | | f.h. fr. NE. V. | | | | c.f. V. NE by E. | | | | f. V. ENE. | | | | f. E. E by S. | | | | f. E. E by N. E. | | | | f. E by S. V. | | | | f. SE by E. | | | | f. SE by E. ESE. | | | | f.c. LSE. | | | | c. ESE. SE by E. | | | | c. SE by E. | | | | c.h. ESE. SE by E.| | | | h. V. SE. | | | | c. E by S. SE by E.| | | | c.f. with fr. V. SE by E.| | | | f.g. with fr.h. SE by E.| | | | h.f. SE. SE by E.| | | | f. ESE. SE. | | | | f. SE. SE by E. ESE.| | | | f. V. ESE. | | | | f. E. E by S. | | | | f. V. | | | | f.c. C. | | | | f.c. C. NE by E. | | | | c.f. WNW. W by S.| | | | h. W by S. V. | | | | c. V. NW. | | | | c. NW. V. | | D.L. | Longitude from Greenwich | Cor. Long. | Magnetical | |------|--------------------------|------------|------------| | A.O. | A.T.K. | Latitude | Az. | Amp. | Face | South Dip. | | N.S.W.E. | S.O.D. | A. | O. | E. | W. | MD. | | 35 | W | W | E | W | S | S | W | E | *0.44 | 14.6 | 15. | 14.7 | | 4 | 25.35 | 28.15 | 115 | 30.10 | 3 | 29 | 24.7 | 23.34 | 30.27 | *0.42 | 0.55 | *1.5 | 17.4 | 18. | 17.6 | | 2 | 24.49 | 27.21 | 174 | 30.15 | 5 | 22 | 25.10 | 24.39 | 29.33 | 0.11 | 0.17 | *0.15 | *0.22 | 19.4 | 20.4 | 20. | | 7 | 24.55 | 27.35 | 147 | 30.2 | 3 | 24 | 26.12 | 25.48 | 29.47 | 0.6 | 0.11 | 21. | 21.6 | 21.3 | | 2 | 25.20 | 28.12 | 27.44 | 27.18 | 30.24 | 1.0 | *1.13 | 1.10 | 23.4 | 24. | 23.6 | | 2 | 25.49 | 28.38 | 28.54 | 28.30 | 30.50 | 2.12 | *1.52 | 2.16 | *1.27 | 26. | 27. | 26.4 | | 4 | 26.23 | 29.18 | 29.55 | 29.35 | 31.29 | 1.52 | 27.2 | 28. | 27.5 | | 6 | 26.36 | 29.27 | 30.36 | 30.22 | 31.37 | *3.0 | *3.14 | 27.6 | 28.6 | 28.2 | | 6 | 26.13 | 29.0 | 30.45 | 30.37 | 31.8 | 2.45 | 2.16 | 27.6 | 28.6 | 28.2 | | 6 | 25.21 | 27.5 | 31.5 | 31.33 | 30.2 | *2.10 | 29. | 30. | 29.4 | | Variation | South Dip | Face | MD. | C.D. | ML. | |-----------|-----------|------|-----|------|-----| | Az. | Amp. | E. | W. | | | | 0° | E | *0.44 | 14.6 | 15. | 14.7 | 15.6 | Not very steady. | | | | | | | | | 10 | Mostly calm throughout, with smooth water. T.S. 74°. | | 27° | *0.42 | *0.55* | 17.4 | 18. | 17.6 | 18.5 | | | | | | | | | | 76 | Major part light breezes, with smooth water. T.S. 73°. | | 33° | *0.11* | *0.17* | 19.4 | 20.4 | 20. | 20.7 | Very steady. | | | | | | | | | 76 | Pleasant breeze and smooth water. T.S. 72°. | | 47° | E | 0.6° | 0.11* | 21. | 21.6 | 21.3 | 22.2 | Extremely steady though long swell. | | | | | | | | | 65 | Pleasant breezes; a long swell. T.S. 70°. | | 44° | I.° | *1.10* | 23.4 | 24. | 23.6 | 24.5 | Pleasant breeze. At 10 A.M. saw a sail bearing S by W. T.S. 69°. | | | | | | | | | 96 | | | 9° | 2.12* | 2.16* | 26. | 27. | 26.4 | 27.3 | Light breezes throughout. Passed by the sail at midnight; it was a small two-mast vessel. At 6 A.M. saw the vessel a-tern. T.S. 69°. | | | | | | | | | 76 | | | 9° | 1.52* | 27.2 | 28. | 27.5 | 28.4 | Very steady. | | | | | | | | | 69 | Winds mostly variable. T.S. 67°. | | 7° | *3.° | *3.14 | 27.6 | 28.6 | 28.2 | 29.1 | Light airs. T.S. 63°. | | 8° | 2.45* | 2.16* | 27.6 | 28.6 | 28.2 | 29.1 | Mostly calm. T.S. 66°. | | 2° | *2.10 | 9. | 30. | 29.4 | 30.3 | Very unsteady. | | | | | | | | | 53 | Major part light breezes. T.S. 67°. | RCROMBIE, kept by ALEXANDER DALRYMPLE, 1775. | Th. | Marine Barometer | Weather and Winds | |-----|------------------|------------------| | | R. | S. | Th. | D. | D.L. | A.O. | T.K. | N | S | W | E | Longitude | | | In.Dec.| In.Dec.| In.Dec.| NW by W. | | July | 65½ | 30.2½ | 30.1½ | NW by W. NW by N. | | | | | | NW by N. | | | | | | NW by N. | | | | | | NW by N. | | | | | | NW by N. | | | | | | NW by N. | | | | | | NW by N. | | Aug. | 61½ | 29.8½ | 61½ | NNW. | | | | | | NNW. | | | | | | NNW. NW. WNW. | | | | | | WNW. W by N. | | | | | | W. | | | | | | W. V. W by S. | | | | | | W by S. WSW. | | | | | | WSW. V. W by S. | | | | | | SW. V. W. | | | | | | NE by N. | | | | | | ENE. V. | | | | | | NEbyE. N. WNW. V. W. | | | | | | W by N. V. W by S. V. | | | | | | S by E. | | | | | | S by E. | | | | | | S by E. SSW. | | | | | | SSW. S by W. | | | | | | SW by S. V. SSW. | | | | | | S by W. | | | | | | SSW. S by W. | | | | | | S by W. S. | | | | | | S. S by E. | | | | | | S by E. C. | | | | | | NNE. C. NNE. | | | | | | NE by N. V. NNE. | | | | | | NNE. NE by N. | | | | | | NN. | | | | | | NNE. | | | | | | NNE. V. N by E. N. | | | | | | V. NNW. V. | D.L. Longitude A. | D.L. | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip. | |------|------|--------------------------|----------|------------|-----------|------------| | A.O. | A.T.K. | N S W E | A. TK. | D.D T.K. | S.O.D. | A. O. | Az. Amp. | Face E. W. | M.I. | | NW by N. | 7 | 5 | W W | 22.36 | 25.6 | S S W | 32.3 | 32.8 | 27.10 | E 2.26* | E *1.42 | 31.3 | 32.3 | 31. | | NW. NbyW. | 5 | 26 | 19.14 | 33.14 | [33.19] | [24.3] | 0.44* | | W. WNW. | 2 | 16 | 16.28 | 19.24 | 33.35 | 33.35 | 21.22 | 34. | 35. | 34. | | W by S. | 2 | 16 | 14.53 | 17.33 | 34.9 | 34.7 | 19.28 | *2.35 | 33.4 | 34.4 | 34. | | SW. | 1 | 5 | 13.56 | 16.29 | 34.26 | 34.25 | 18.21 | W 3.18* | 34.4 | 35.4 | 35. | | VNW. V. W. | 2 | 12 | 11.45 | 14.30 | 33.37 | 33.34 | 16.19 | | V. | 11 | 35 | 9.24 | 11.34 | 33.37 | 33.23 | 13.20 | | SSW. | 14 | 2 | 7.19 | 9.27 | 33.37 | 33.9 | 11.10 | | W. | 25 | 6 | 6.5 | 33.37 | [33.21] | [9.53] | | NNE. | 3.55 | 5.57 | 33.51 | 33.48 | 7.37 | * Indicates magnetic variation. | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | MD. | C.D. | E. | W. | Not steady. | | 2.26* | *1.42 | 31.3 | 32.3 | 31.7 | 32.5 | 6084 | | *1.27 | | | | | | | An increasing gale from NW quarter, with frequent squalls. | | | | | | | | | 9 P.M. bar. 30.12. 8 A.M. 30.14. T.S. 65°2. | | 0.44* | | | | | | | Strong gales, with hard squalls and rain. | | | | | | | | | 9 P.M. bar. 30.12. 12. 30.1. 8 A.M. 29.92. 10. 29.9. 11½. 29.8½. | | | | | | | | | First part, blowing very fresh from N.W. Latter, more moderate, with very large sea. Bar. 14. 29.7½. 24. 29.7. | | | | | | | | | 4. 29.7½. 6. 29.8. 8. 29.8. 10. 29.8. A.M. 7. 29.8. | | | | | | | | | Major part, light breezes, with great swell. | | | | | | | | | Winds variable, with squally weather and confused seas. | | | | | | | | | Bar. 3 P.M. 29.8. 6. 29.7½. 10. 29.7. 8 A.M. 29.3. | | | | | | | | | 9 A.M. 29.2½. About noon, it appeared very threatening to the Northward, but the clouds dissipated. | | | | | | | | | First part, squally with some rain. The middle, excessive hard gales, with a great sea; and the spray so thick that the ship was covered with it. | | | | | | | | | 2 P.M. bar. 29.2½. 4. 29.2. 6. 29.2½. 9. 29.5. 7 A.M. 29.7½. 9. 29.7½. 11. 29.8. | | | | | | | | | Squally weather, with much hail and rain, and a large swell. | | | | | | | | | Bar. 4 P.M. 29.8½. 6. 29.9. 8. 30.0. 7 A.M. 30.0½. | | | | | | | | | 9 A.M. 30.0½. | | | | | | | | | First and middle, fresh gales and squally. Latter, moderate; great swell. AM. some silver birds. | | | | | | | | | Bar. 2 P.M. 30.0½. 5. 30.1. 10. 30.2. 7 A.M. 30.2. 9. 30.3. | | | | | | | | | First, light airs, with cloudy weather. Latter, fresh gales, with rain. P.M. Venus appeared very dim and fuzzy; a rim round the Moon. | | | | | | | | | 9 A.M. bar. 30.1½. 11. 30.0½. | | | | | | | | | First and middle, hard gales, squally with rain. Latter, moderate and hazy; great swell. AM. some silver birds, a pintado bird. | | | | | | | | | Bar. 2 P.M. 29.9½. 8 A.M. 29.9½. | * D d d 8 | Th. | Marine Barometer | Weather and Winds | D.L. | Longitu | |-----|-----------------|------------------|------|---------| | | R. S. Th. D. | In.Dcc. In.Dcc. | | | | 1775| | | | | | Aug.| 9 | 62½ 30.0½ 62½ | f. | NW by N. NNW. | | | | | f. sq. h. sq. r. | NNW. N by E. | | | | | sq. r. r. sq. | N by E. N. | | | | | sq. sq. r. | N. | | | 10 | 62½ 30.2½ 30.2 | fr. h. | N. N by W. | | | | | h. dr. h. | N by W. N. | | | | | h. c. | N. N by E. | | | | | c. | N by E. | | | 11 | 61¼ 30.1¼ 30.0¼ 60¼ 30.0 | h. | N by E. | | | | | h. sq. | N by E. NNE. | | | | | sq. c. | NNE. | | | | | c. f. | NNE. | | | 12 | 60 30.1 30.04 59½ 29.9¾ | h. | N by E. | | | | | h. fr. | N by E. | | | | | fr. | N. V. | | | | | hr. | V. | | | 13 | 58¾ 30.2 30.1¼ 59¼ 30.0 | f. c. | N by W. NNW. | | | | | c. fr. c. f. | NNW. NW. | | | | | f. | NW. NNW. | | | | | f. sq. r. c. | NNW. NW by W. W by N. W. | | | 14 | 58¾ 30.3¼ 30.3¼ 59 30.2¼ | f. | WSW. SW by W. | | | | | c. | SW by W. SSW. S by W. | | | | | c. | S by W. V. | | | | | c. | V. WSW. C. | | | 15 | 60½ 30.3 30.2¾ 60½ 30.1½ | f. c. | V. | | | | | c. | NW by W. NW. | | | | | c. | NW. WNW. V. | | | | | c. | V. NNW. | | | 16 | 60½ 30.1½ 30.1¼ 60½ 30.0¾ | c. | N by W. | | | | | c. f. c. | N by W. | | | | | fr. c. sq. c. fr. | N by W. N by E. | | | | | fr. c. | N by E. | | | 17 | 61 30.2 30.2 61 30.1 | c. sq. sq. r. | N by W. V. NNW. | | | | | sq. r. | NNW. NW by N. | | | | | sq. r. c. | NW by N. V. | | | | | c. | NW by N. | | | 18 | 61 30.2¼ 30.2¼ 61 30.1½ | f. | N by E. N by W. | | | | | f. c. | N by W. | | | | | c. h. | N by W. N. V. | | | | | h. | V. | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, 1775, kept by Mr. | D.L. | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|------|--------------------------|----------|------------|---------| | A.O. | A.T.K. | S.W.E. | A.T.K. | D.O.D. | S.O.D. | A.A. | O.O. | Az. | Amp. | Face | MD. | | N.S. | W.E. | | | | | | | | | E.W. | | | 8 | 17 | W | W | E | E | 34.6 | 34.11 | 4.51 | 8.50* | 8.1* | | 4 | 4 | E | 1.15 | 0.26 | 34.6 | 34.15 | 2.0 | 37. | 39. | 38. | | 17 | 1 | E | 4.5 | 2.25 | 34.1 | 34.27 | 0.54 | *12.43 | | 25 | 6.17 | 5.2 | 33.47 | [34.36] | 3.34 | 39.4 | 41. | 40.2 | | 10 | 8.43 | 7.26 | 33.37 | 34.13 | 6.3 | *16.9 | | 16 | 16 | 10.4 | 9.3 | 33.44 | 34.4 | 7.43 | 16.43* | 41.4 | 43.2 | 42.3 | | 32 | 11.10 | 10.41 | 33.49 | 34.9 | 9.24 | 41.4 | 43.4 | 42.4 | | 2 | 9 | 13.32 | 13.12 | 94 | 11.38 | 4 | 33.53 | 34.15 | 11.58 | 18.18* | 17.52* | 42.6 | 44. | 43.3 | | 8 | 19 | 16.29 | 15.50 | 75 | 14.35 | 1 | 34.1 | 34.15 | 14.39 | 19.39* | 19.56* | 43.4 | 45.2 | 44.3 | | 4 | 9 | 19.1 | 18.13 | 34.5 | 34.15 | 17.5 | 20.50* | 22.0 | 20.47* | 45.6 | 46.4 | 46.1 | | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | MD. | C.D. | E. | W | | | 8.50* | 8.1* | 37. | 39. | 38. | 38.6 | Very unsteady. | | *12.43 | | 39.4 | 41. | 40.2 | 41. | Unsteady. | | *16.9 | | 41.4 | 43.2 | 42.3 | 43.1 | Very steady. | | 16.43* | | 41.4 | 43.4 | 42.4 | 43.2 | Extremely steady. | | 18.18* | 17.52* | 42.6 | 44. | 43.3 | 44. | Very steady. | | 19.39* | 19.56* | 43.4 | 45.2 | 44.3 | 45. | Not very steady. | | 20.50* | 20.47* | 45.6 | 46.4 | 46.1 | 46.6 | | **Magnetic** First, moderate breezes and fair. Latter, fresh gales, with squalls and rain. Bar. 8 P.M. 30.1. 9. 30.0. 11. 30.0. Major part, fresh gales. Bar. 2 P.M. 30.0. 7. 30.0. 8. 30.0. 11. 30.0. 6 A.M. 30.0. 9. 30.0. Two black albatrosses. A.M. a few pintado birds and some silver birds. Fresh gales, with squally weather and a large sea. Bar. 9 P.M. 30.2. 11. 30.2. 9 A.M. 30.1. 10. 30.0. A.M. many pintado birds, shearwaters, &c. one albatross. Most part, fresh breezes and hazy. Bar. 1 to 10 P.M. 30.0. to 30.0. 8 A.M. 30.0. 9. 30.0. Several poor Johns, some shearwaters, and a young albatross, but no pintado birds. Most part, fresh gales with some rain. Bar. 1 P.M. 30.0. 4. 30.0. 8 A.M. 30.0. 9. 30.0. 11. 30.0. Several poor Johns, shearwaters; and A.M. a few pintados. First part, fresh breezes. Latter, light airs. Bar. 8 P.M. 30.1. 12. 30.2. 9 A.M. 30.3. 12. 30.3. Some porpoises. First part, variable. Latter, an increasing gale from NW. with cloudy weather. Bar. 9 P.M. 30.3. 11. 30.3. Moderate gales, with some light squalls and smooth water. Bar. 4 P.M. 30.2. 6. 30.2. 10. 30.2. 12. 30.2. 8 A.M. 30.1. 11. 30.1. A.M. some pintado birds, and several silver birds, some setting on the water, others flying about. Fresh gales throughout, with cloudy weather and some squalls. P.M. large black albatrosses. A.M. some pintado birds, shearwaters, &c. Bar. 3 P.M. 30.1. 9. 30.1. 12. 30.1. 7 A.M. 30.1. 9. 30.1. Pleasant breeze and mostly hazy. Several pintado birds. A.M. two birds, somewhat larger than silver birds, with swallow-tails flying above the ship; also a Cape hen, and several grampusses. Bar. 9 P.M. 30.2. 12. 30.2. 9 A.M. 30.2. | T | Marine Barometer | Weather and Winds | D.L. | D.L. | Longitude | |---|-----------------|------------------|------|------|-----------| | | R. S. Th. D. | | | | | | 1775 | In.Dec. In.Dec. | | | | | | Aug. 19 | 60½ 30.1 30.0 60½ 30.0 | { h. N by E. WNW. NW by N. h. dr. NW by N. WNW. dr. fr. WNW. V. fr. V. } | 7 | 8 | 19.49 I | | 20 | 61 30.0½ 30.0½ 60½ 29.9½ | { h. NNW. h. NNW. N. V. NE by N. h. N by E. N. NNE. h. N by E. NE. } | | | | Journal of a Voyage to The East-Indies, in the Ship | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor Long. | Variation | South Dip. | |------|------|------|--------------------------|----------|-----------|-----------|------------| | N/S | W/E | | | S/O/D | A. O. | Az. Amp. | Face MD | | E | E | E | | S | S | E | W | | 7 | 8 | 19.49| 19.9 | 34.19 | 34.22 | 18.6 | 45.2 | | | | | | | | | 46.6 | | | | | | | | | 46.6 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | *Note: The table appears to be incomplete or contains additional information not visible in the image. | Variation | South Dip | |-----------|-----------| | Az. | Amp. | | Face | MD. C.D. | | E. | | | ML. | |-----------| Most part, light breezes and hazy. At 2 P.M. saw the land from mast-head ESE. per compass. Peaked hum of Cape Good Hope, S 52° 48' E. Hum. mistaken for Cape, S 57° E. L. ext. Table Land, N 69° E. L. ext. in sight, E 19° N. Sugar Loaf, N 73° E. At Sun-rise Table Land, N 73° E. Cape Good Hope, S 60° E. At noon L. ext., N 55° E. Cape Good Hope, S 61° E. Longitude per T.K. 19° 9' E. Cape Good Hope per chart, 0° 21' E. Longitude of Cape per T.K. 19° 30' True longitude of Cape, 18° 27' Error of T.K. 1° 3' Major part, moderate and hazy. In False Bay. At 4 h. Cape Good Hope, E 16° S. Sunset L. ext. N 21° E. R 21° Bluff Point in one with Hummock. 72° 10' Cape Good Hope * 2d. 86° 6 Hanglip. * 2d Cape Good Hope. L 24° 10' Hummock, called Cape last night. 7° 0 Hummock. 1° 0 Outer Hummock and highest part diff. Ridge. R 13° 48' Hanglip. Bells, E 15° S. Sunrise, Hanglip, S 47° E. Cape Good Hope, S 36° W. White Sand Hills in Symmon's Bay, N 33° W. Hanglip Point, S 35° E. At noon Cape Good Hope, S etc. W. Noah's Ark, NW about 4' dist. N.B. All these bearings are by compass, without allowing for variation. At 4 P.M. being calm, hoisted out the pinnace, and towed in towards the harbour. At 7 anchored in 20 fath. Noah's Ark W. Roman Rock NW ½ W dist. about two miles. * D d d 9 | Date | Weather Description | Wind Direction | Notes | |------|---------------------|---------------|-------| | Aug. 21 | Strong gales and squally. | S. S by E. | At 4 A.M. found ship drove, veered to a whale. | | | Fresh gales with hard squalls. P.M. increasing. | S by E. | At 8, gale increasing, swayed up lower yards. | | Aug. 23 | Strong gales and excessive hard squalls. Towards midnight began to moderate. | SE. | At 1 P.M. anchored in Symmon's Bay, in 7 fathoms. | | Aug. 24 | Moderate and fair. | NW. | | | Aug. 25 | Moderate and cloudy. | W. SW. | | | Aug. 26 | Fresh breezes, with some rain. | SE. | | | Aug. 27 | Light breezes mostly from SE. with fair weather. | V. | Sailed a Dutch snow. | | Aug. 28 | Light breezes and fair. | NW to W. | Sailed La Bretagne, Capt. Manson for Mauritius. | | Aug. 29 | First and middle, moderate and cloudy, with some rain. Latter, squally. | SW. | Returned. | | Sept. 30 | Strong gales and clear weather. | SSE. | | | Sept. 1 | Moderate and fair for most part, and a swell. | SE. | | | Sept. 2 | Strong gales and hard squalls. | NW. | Sailed again. | | Sept. 3 | Major part, squally with rain. Towards evening, light breezes and fair. | NW. | | | Sept. 4 | Moderate and fair. | V. | Sent long-boat to endeavour taking up the anchor. | | Sept. 5 | Strong gales and very hard squalls; could not fend a boat ashore. | S by E. | | | Sept. 6 | Moderate and fair. | V. | | | Sept. 7 | Mostly light breezes. | V. | | | Sept. 8 | P.M. a fresh gale. | SW. | | | Sept. 9 | Moderate breezes. | V. | | | Sept. 10 | Moderate and fair. | S by E. | | | Sept. 11 | Strong gales and hard squalls. | Sy. | | | Sept. 12 | Light winds from Southward, and fair weather. | V. | | | Sept. 13 | Fair. | V. | | | Sept. 14 | Fair. | C. | Sailed the Anson, Capt. Tryon, for England. | | Sept. 15 | Light airs and first part, calm. Latter part, breezes. | C. Wr. | Sent long-boat again to try for the anchor, but | | Sept. 16 | Fair. | V. | | | Sept. 17 | Strong gales, with rainy weather. | NW. | | | Sept. 18 | Fresh gales. | NW. | | A.M. found ship drove, veered to a whole cable; got down top-gallant yards, lowered fore and main yards, and got sheet. gale increasing, swayed up lower yards. At noon, close reefed top-sails, stopt the cable, and came to sail. P.M. anchored in Symmon's Bay, in 7½ fath. when moored, lower flag staff from Point WSW. Dolphin's Nose NE. R. a Dutch snow. La Bretagne, Capt. Manson for Mauritius. again. long-boat to endeavour taking up the anchor: returned with 80 fathoms of cable, but could not weigh the anchor. the Anson, Capt. Tryon, for England. long-boat again to try for the anchor, but could not purchase it. ABERCROMBIE, 1775, kept by ALEXANDER DALRYMPLE. covered fore and main yards, and got sheet anchor overside. cable, and came to sail. Point WSW. Dolphin's Nose NE. Roman Rocks E½S. Noah's Ark SE. Hanglip SE¼S off shore ¼ of a mile. but could not weigh the anchor. | Th. | Marine Barometer | Weather and Winds | D.L. | Longi | |-----|------------------|-------------------|------|-------| | | R. S. i h. D. | In.Dec. In.Dec. | N S | W E | | 1775| | | | | | Sept.| | | | | | 19 | 59 | 30.1 | f. | NW. NW by W. | | | | | c. f.| NW by W. WNW. | | | | | f. | C. | | | | | c. | C. E. C. WNW. NW. | | 20 | 59½ | 30.0½ | c. | NW. NW by N. | | | | | c. fq.| NW by N. N by W. | | | | | fq. c.| N by W. NNW. | | | | | c. fq. fq. r.| NNW. | | | | | c. | NW by W. WNW. W by S. | | | | | c. fq. c.| W by S. W. | | | | | c. | W. W by S. | | | | | c. fq. fq. r.| W by S. | | | | | fq. | W by S. SW. | | | | | c. f.| S by W. S. | | | | | f. c.| S. C. V. | | | | | c. f.| NE. NE by E. ENE. | | | | | f. | NE by E. ENE. | | | | | f. | NE by E. | | | | | f. | NE by E. | | | | | f. | ENE. NE by E. | | | | | h. | NE by E. | | | | | h. | NE by E. NE by N. V. | | | | | h. c.| V. W. | | | | | c. | W. WNW. NW by W. | | | | | c. | W by N. V. W by N. | | | | | c. h.c.r.c.| W by N. WNW. V. NW. | | | | | c. r.| NW. V. | | | | | r. fq.| WSW. | | | | | fq. | WSW. | | | | | fq. fq. fr. fq.| WSW. SW by W. | | | | | c. r.| SW by W. W by S. W by N. | | | | | r. | W by N. WNW. | | | | | c. | N by W. | | | | | c. fq. r.| N by W. NNW. | | | | | fq. r. h.| NNW. W by N. | | | | | fq. c.| W by N. W. WNW. | -2 | D.L. | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|------|--------------------------|----------|------------|---------| | A.O. | A.T.K.| TK. | D.D. | S.O.D. | A. | O. | Az. | Amp. | South Direction | | N.S | W.E | | | | | | | | E.W. | | | | | | | | | | | M. | - 18.43 18.52 - 21.26 - 24.22 - 25.36 - 27.8 - 28.13 27.23 - 29.35 - 32.9 31.50 - 35.18 - 34.48 18.52 - 35.59 35.55 [21.15] - 36.21 36.9 [24° 1] - 36.37 36.15 [25° 5] - 37.34 37.6 [26.27] - 37.58 37.39 27.23 - 37.32 36.58 [29° 0] - 37.1 36.6 31.50 - 36.40 35.24 [34.55] | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face E. | W. | MD. | C.D. | | Cape of Good Hope lat. | 34°22' S. | long. 18°27' E. | At Sun-set, Cape Good Hope NW=WNW. Table Land N by W=NW by N. Hanglip E 7 N=E 29½ N. Eastern ext. in sight E 5°S=E 17½ N distance 6 leagues from nearest land. At Sun-rise, Cape Good Hope N by W=W=NW¼N 9 or 10 leagues. Hanglip Point NE=NNE. Ext. to Ed. ESE=E. Saw a sail, supposed the Gattan, come round from Table Bay, to join us. At noon, Cape Good Hope N per comp.=N 22½ W. Hanglip N 35 E=N 12½ E 9 leagues. Eastern ext. N 80 F=N 57½ E. Major part, light breezes and fair weather, with great swell from SW. 154 Fresh gale, with a very large sea. Bar. 9 P.M. 30.1. 8 A.M. 30.1. 144 Fresh gales and great swell. Bar. 8 P.M. 30.1. 8 A.M. 30.1. First part, decreasing gale. Middle, calm. Latter part, a breeze from the NE. Great swell. A.M. bar. 30.3. N.B. it was not observed at noon. Past 1 P.M. it was 30.2½ Many alcatrasses, pettrils, pintado birds, &c. First part, fresh gales. Latter, hard gales, with great and confused sea. Mostly fair weather. 2 P.M. bar. 30.2½ 9. 30.1. 11. 30.0. 8½ A.M. 29.8. Many pettrils, pintado birds, &c. First part, hard gales from Nd. Latter, from Wd. with a very large NE swell, confused in heaps. Many alcatrasses, pettrils, pintado birds, &c. Bar. 29.6 to 29.5½. First part, light breezes. Latter part, fresh breezes. A.M. swell much abated. Many alcatrasses, pintado birds, pettrils, &c. Bar. 2 P.M. 29 5½. 3. 29.6. 12. 29.6. 8 A.M. 29.6½. 9. 29.6½. Strong gales, mostly Wd. with squalls and some rain. Many alcatrasses, pintado birds, &c. and great many pettrils. Bar. 2 P.M. 29.6½. 4. 29.7. 6. 29.8. 9. 29.8½. 8 A.M. 29.9. 9. 29.9½. 11. 29.9½. First part, fresh gales and squalls. Latter, moderate. A great swell. Many alcatrasses, pintado birds, pettrils, &c. Bar. 4 P.M. 29.8½. 6. 29.9. 9. 29.9. 12. 29.9. 8 A.M. 30.1. 9. 30.1½. 11. 30.1½. * D d 10 | Th. | Marine Barometer | Weather and Winds | D.L.A.O.T.K. | Longitude | |-----|------------------|------------------|--------------|-----------| | | R. S. Th. D. | | N S W E A. | | | 1775| | | | | | Sept.| In.Dec. In.Dec. | | | | | 28 | 62½ 30.3 30.2¾ | h. fq. r. r. | W by N. | 9 | | | | r. h. | W. W by N. | 36.54 | | | | h. | W by N. NW by W. | | | | | h. | V. NW by W. | | | | | f. | NW by N. N by W. | | | | | f. fq. h. fq. | N by W. V. N by E. | 27 | | | | c. | N by E. N. | 39.48 | | | | c. | N. N by E. | | | | | c. hfg. r. L. Th. | N by E. N. V. | | | | | L. to s w. c. | V. W. | | | | | c. fq. r. | W by S. | 6 | | | | fq. r. h. c. | W by S. SW by W. SW. | 42.52 | | Oct. | | | | | | 1 | 61½ 30.3¼ 30.3 | h. c. | WSW. S by W. S. | 20 | | | | c. | SSE. S by E. | 43.59 | | | | c. | SE. SE by E. SE by S. | 12 | | | | c. | SE. C. E. | | | | | c. fr. | E by S. E. V. | | | | | fr. c. fq. h. | V. ESE. E. ENE. | 45.24 | | | | h. | NE. | | | | | h. | NE. NE by N. | | | | | f. | NE. | | | | | f. h. f. | NE. | | | | | f. fq. h. | NE. | | | | | h. f. | NE. NE by E. | | | | | h. | NE by E. | | | | | h. | NE. | | | | | h. | NNE. | | | | | h. | NNE. | | | | | h. | NE by N. | | | | | h. | NE by N. | | | | | h. fq. c. | NE by N. N. | | | | | c. | N. | | | | | h. | N by W. | | | | | h. | N by W. NNW. | | | | | h. | NNW. NW. | | | | | h. c. | NW.WNW. NW. V. S by E. SSE. | 55.14 | | | | c. fq. r. | SE by E. V. SSE. | 56.11 | | | | r. h. | ESE. SE by S. S by E. S. | 17 | | | | h. f. | S by W. | | | | | f. | S by W. V. | | The East-Indies, in the Ship Grenville, Capt. Burnet Abercrombie, 1775, kept by | D.L. | A.O. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|------|--------------------------|----------|------------|---------| | N | S | W | E | | | | 9 | E | 36.54 | S | 36.3 | Az. | | | | 36.26 | | 34.49 | | | | | | | 36.26 | | | | | | | | | | 27 | 39.48| | | | | | | 39.47| | | | | | | | | | | | | 6 | 42.52| | | | | | | 42.57| | | | | | | | | | | | | 19 | 43.59| | | | | | | | | | | | | | | | | | | | 2 | 47.36| | | | | | | 47.56| | | | | | | 47.24| | | | | | | | | | | | | 6 | 50.15| | | | | | | 50.41| | | | | | | | | | | | | 1 | 53.8 | | | | | | | 53.35| | | | | | | | | | | | | 12 | 55.14| | | | | | | 56.1 | | | | | | | | | | | | | 17 | 56.11| | | | | | | 57.11| | | | | | | 56.45| | | | | *Note: The table includes various measurements such as longitude, latitude, and magnetic variation, with entries for different dates and locations. | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | MD. | C.D. | E. | W | G denotes Capt. Money's Observations in the Gatton, the longitude reduced to noon. | | 27.30* | 57.4 | 58.4 | 58.4 | Very unsteady. | 86 | Pleasant breeze. Many albatrosses, pintado birds, petrels, &c. Bar. 3 P.M. 30.1½. 6. 30.2. 10. 30.2½. 12. 30.2¾. 8 A.M. 30.2¾. | | 27.43* | 144 | Major part, fresh gales. Many albatrosses, pintado birds, petrels, &c. Gatton, var. az. 28° 13' W. Bar. 1 P.M. 30.2¼. 5. 30.1¼. 9. 30.1. 12. 30.2¼. 6 A.M. 29.9¾. 8. 29.9¾. 10. 29.9¾. | | 26.49* | 64 | First and middle, fresh gales, with hard squalls, thunder, lightning, and rain. Latter, blowing fresh and hazy weather. Many petrels, pintado birds, &c. and A.M. one silver bird. Bar. 2 P.M. 29.8¾. 4½. 29.8¾. 5¾. 29.7¾. 6. 29.7¾. 8¾. 29.8¾. 9¾. 29.9. 11. 29.3. | | 25.57 | 85 | First part, light breezes. Latter, fresh. P.M. many albatrosses, &c. G long. O and C, 45° 31' E. Bar. 5½ P.M. 30.3. 8. 30.3. 12. 30.2. 8 A.M. 30.1½. | | 25.57* | 110 | Moderate breezes throughout, weather changeable. Few birds, great dews, and water remarkably smooth. G var. 4 az. 26° 46¾. amp. 26° 47¾. Bar. 2 P.M. 30.1½. 6. 30.1¼. 12. 30.2¼. 8 A.M. 30.2¼. 5¾. 30.3. | | 25.57* | 132 | Mostly fresh gales. Some pintado birds. A.M. great dews; water smooth. G long. O and C 50° 39' E. Bar. 1½ P.M. 30.2¼. 4. 30.2¼. 7¼. 30.2. 12. 30.2. 6 A.M. 30.2¾. | | 25.57* | 143 | Fresh breezes. Some pintado birds. A.M. one petrel. G var. 4 az. 26° 9¾. amp. 26° 7¾. Bar. 2 P.M. 30.2¾. 6. 30.2¼. 6 A.M. 30.1½. 8. 30.2. 9¾. 30.2¾. | | 24.42* | 106 | First part, fresh gales. Latter, light and variable. P.M. an albatross. A.M. several albatrosses and pintado birds. G var. 2 az. 24° 42¾. Bar. 1½ P.M. 30.2¼. 4. 30.1¼. 6. 30.1¼. 10. 30.¼. 12. 30.1¼. 8 A.M. 30.1¼. 9. 30.2¼. | | 24.42* | 53 | First and middle, light breezes and rain. Latter, light breezes and fair weather. P.M. a turtle passed; several albatrosses and other birds. Bar. 1½ P.M. 30.1¼. 5. 30.1¼. 6. 30.1¼. 9¼. 30.2¼. 12. 30.2¼. 8 A.M. 30.2¼. | | Th. | Marine Barometer | Weather and Winds | |-----|------------------|------------------| | | R. S. Th. D. | c. SW. V. | | 1775| In.Dec. In.Dec. | c. C. V. | | O&. | 8 61½ 30.3½ 30.3 61 30.2½ | f. V. W. | | | | f. V. NW by W. | | | | f. NW by W. WNW. W by N. | | | | f. W by N. WSW. | | | | f. WSW. SW by W. | | | | f. h. SW by W. V. | | | | h. f. S by W. S by E. SSE. | | | | f. V. SE by S. S by E. | | | | f. S by E. C. | | | | f. WNW. NW. WNW. | | | | f. NW by W. | | | | f. c. NW by W. | | | | c. NW by W. WNW. | | | | c. f. WNW. | | | | f. WNW. | | | | f. h. c. WNW. | | | | c. WNW. | | | | h. NW by N. NNE. | | | | h. NNE. N by E. | | | | h. c. N by E. | | | | c. fig. c. N by E.| | | | h. N by E. | | | | h. N by E. NNE. | | | | h. NNE. NE by N. | | | | f. NNE. NE. | | | | f. fig. NE. | | | | fig. h. NE. NE by N. NNE. | | | | h. fig. NNE. | | | | fig. r. r. h. NNE. V. N. | | | | h. N. NNW. NW. | | | | h. e. NW. W by S. SW by S. | | | | c. SW by S. S by W. | | | | c. SSE. | | | | c. SSE. SE by S. | | | | c. SE by S. ESE. V.| | | | c. V. C. | | Longitud. | |----------| | D.L. | | A.O. | | T.K. | | N S W/E | | A. | | 56.32 | | 58.18 | | 58.46 | | 60.18 | | 61.39 | | 63.34 | | 65.6 | | 67.26 | | 69.34 | | 70.30 | | D.L. | D.I. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip | |------|------|--------------------------|----------|------------|-----------|-----------| | N | S | W E | A. | TK. | D. | S. O. D. | A. | O. | Az. | Amp. | Face | MD. | | 2 | 23 | E E E E | 56.32 | 57.55 | | 35.50 | 33.28 | 57.55 | 23.48* | 24.2* | 61.4 | 62.6 | | 13 | 12 | 58.18 59.53 4 59.49 | 5 * 32 | 36.5 | 33.30 | 59.53 | 23.49* | 23.57* | 61.4 | 62.2 | 61.7 | | 5 | 1 | 58.46 60.22 45 59.37 | 6 A * 28 | 36.0 | 33.20 | 60.22 | 21.43* | 21.52* | 61.4 | 62.4 | 62.0 | | 6 | 27 | 60.18 62.21 | | 36.6 | 33.20 | 62.21 | 23.10* | 22.47* | 61.4 | 62.4 | 62.0 | | 4 | 12 | 61.39 63.54 | | 36.10 | 33.20 | 63.54 | 21.5* | 20.51* | 62.2 | 63.2 | 62.6 | | 2 | 10 | 63.34 65.59 | | 36.14 | 33.26 | 65.59 | 20.27* | 20.34* | 62.4 | 63.2 | 62.7 | | 2 | 21 | 65.6 67.52 W 25 | 68.17 | 5 0 27 | 36.4 | 33.14 | 67.52 | 19.35* | | 61.6 | 62.4 | 62.1 | | 24 | 24 | 67.26 | | 35.55 [33.17] [70.24] | 18.43* | | | | | | | | 11 | 5 | 69.34 72.44 E 35 | 72.9 2 O 19 | 35.4 | 32.38 | 72.44 | | | | | | | | 11 | 5 | 70.30 73.35 | | 34.57 | 31.41 | 73.35 | | | | | | | | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | E. | W. | MD. | C.D. | | | 23.48* | 24.2* | 61.4 | 62.6 | 62.4 | Pretty steady. | | 23.49* | 23.57* | 61.4 | 62.2 | 61.7 | 62.3 | Very steady. | | 21.43* | 21.52* | 61.4 | 62.4 | 62.6 | 62.4 | Pretty steady. | | 23.10* | 22.47* | 61.4 | 62.4 | 62.6 | 62.4 | Not very steady. | | 21.5* | 20.51* | 62.2 | 63.2 | 62.6 | 63.2 | Very steady. | | 20.27* | 20.34* | 62.4 | 63.2 | 62.7 | 63.3 | Not very steady. | | 19.35* | 61.6 | 62.4 | 62.1 | 62.5 | Pretty steady. | | 18.43* | 61.4 | 62.2 | 61.7 | 62.3 | Not steady. | Mostly light airs and calms, with large swell from SW. Few birds. G var. 3 az. 23° 32'*, amp. 23° 50'*. Bar. 6 P.M. 30.3. 8 A.M. 30.3. 10. 30.3. Major part, pleasant breezes and fair weather. Just before noon a sail passed close to the ship on the larboard side, at same time a flock of a vast number of small white birds at some distance on starboard quarter. G var. 2 az. 23° 25'*. Bar 2½ P.M. 30.3. 7. 30.3. 1 A.M. 30.3. 9. 30.3. Mostly light airs, with a large swell from W. P.M. a grampus very near the ship. Several albatrosses, &c. G var. az. 22° 19'*, amp. 22° 23'*. | Th. | Marine Barometer | Weather and Winds | D.L. | Longitu | |-----|-----------------|------------------|------|---------| | | R. S. Th. D. | | | | | 1775| In.Dec. In.Dec. | | | | | O&. | 63½ 30.4 30.4 | f. c. V. C. | | | | 18 | 63½ 30.4 30.4 | c. C. E by N. V. NE. V. | 6 | E | | | | c. h. c. NE by E. NE. V. | | | | | | c. V. N by E. | | | | | | h. c. NNE. N. N by E. NE. | 5 | 70.32 | | 19 | 66½ 30.4 30.4 | c. NNE. N by E. NNE. NE. | | | | | | c. NE. NE by N. NNE. | | | | | | c. NE by N. N by E. | | | | | | f. NE by N. | | | | 20 | 65 30.3 64½ | f. NE by N. N by E. | 1 | 72.21 | | | | f. N. NNE. | | | | | | f. NNE. N by E. N. | | | | | | f. N. N by W. | | | | 21 | 63½ 30.2½ 30.2 | f. c. N by W. | | | | | | c. fig. c. NNW. NW by N. | 10 | 73.16 | | | | c. fig. r. NW by N. NW. V. SW by S. | | | | | | f. SSW. | | | | | | f. SSW. S by E. | | | | 22 | 61½ 30.4 30.3½ | c. SSE. | 7 | 74.46 | | | | c. SSE. SE. | | | | | | c. SE by E. ESE. E. | | | | 23 | 66 30.3½ 30.3¼ | c. E. V. | | | | | | c. fig. E by N. | 21 | 75.9 | | | | fig. c. E by N. | | | | | | f. NE by E. | | | | 24 | 71 30.3¾ 30.3 | f. NE by E. NE. | | | | | | f. NE. NE by E. | | | | | | f. NE by E. V. | | | | | | f. NE by N. C. | | | | 25 | 71¼ 30.3¾ 30.3¾ | f. ENE. E by S, C. | | | | | | f. c. C. | | | | | | c. f. C. SW by S. C. | | | | | | h. fig. r. S by W. S by E. SE. | | | | | | fig. r. fig. c. r. SE. ESE. | 8 | 75.43 | | | | r. fig. r. ESE. | | | | | | fig. fig. r. V. | | | | | | fig. fig. r. V. | | | | | | fig. fig. r. E by S. | | | | | | fig. fig. r. E by S. | | | | | | fig. fig. r. E by N. E. E by N. | 37 | 75.41 | | | | fig. fig. r. E by N. E. | | | | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South L. | |------|------|------|--------------------------|----------|------------|-----------|---------| | N | S | W | E | A. | O. | Az. | Amp. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, 1775, kept by A. | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | E. | W | MD. | C.D. | | | W | W | 61. | 62. | 61.4 | 62. | Pretty steady. | | 31 | | | | | | | | 27 | | 60.6 | 61.6 | 61.2 | 61.6 | Very steady. | | 38 | | 59.4 | 60.4 | 60. | 60.4 | Very steady. | | 55 | | 58. | 58.6 | 58.3 | 58.7 | Not steady. | | 10 | 12.44* | 12.49* | 58. | 58.6 | 58.3 | 58.7 | Not steady. | | 29 | | 56.4 | 57.2 | 56.7 | 57.3 | Very steady. | | 39 | 7.53* | 8. | 1* | 56.2 | 56.6 | 56.4 | 57. | | 10 | 10.3* | *9.8 | 56.2 | 57. | 56 | 57.1 | Extremely unsteady. | | 45 | | | | | | | | | 40 | | | | | | | | Mostly light airs and calm, with a large swell. At night, sea luminous like blubber. Several albatrosses, &c., sight of Gatton; got sight of her again before noon. Bar. 2 P.M. 30.4. 5½. 30.4. 11. 30.4. 1 A.M. 30.4. 8. 30.4½. 10. 30.4½. Light airs. Sea luminous at night like blubber. P.M. an uncommon bird like Cape hen, some albatrosses. Bar. 2 P.M. 30.4. 4. 30.4. 10. 30.4. 12½. 30.4. 7½ A.M. 30.3¾. 8½. 30.4. 10. 30.4½. Pleasant breezes. Sea luminous at night like blubber. A.M. sky mare's tails. No birds. G var. 4 az. 15° 24¾. amp. 15° 2¾. Long. Oand D 75° 6'. Bar. 2½ P.M. 30.3¾. 11. 30.3¾. 1 A.M. 30.3¾. 8. 30.3¾. Moderate breezes. Sea luminous at night like blubber. Towards evening became cloudy. No birds. G var. 2 az. 14° 10¾. Bar. 2 P.M. 30.3. 6. 30.2¾. 8. 30.2¾. 10¼. 30.2¾. 12. 30.2¾. 8 A.M. 30.2¾. 9. 30.1¾. 10. 30.2¾. 11. 30.2¾. Fresh gales. A.M. one or two poor Johns. No other birds. G var. 2 az. 12° 31¾. amp. 12° 51¾. Bar. 2 P.M. 30.2¾. 4. 30.1¾. 5¾. 30.2¾. 6½. 30.2¾. 10½. 30.2¾. 12. 30.2¾. 9 A.M. 30.3¾. Major part, moderate breezes. P.M. several poor Johns, though fleaderer and smaller than usual. A.M. poor Johns, a petrel, and a shearwater. Bar. 2 P.M. 30.3¾. 6¼. 30.3¾. 12. 30.3¾. 8½. 30.3¾. 9. 30.3¾. 10. 30.3¾. First part, pleasant breeze. Latter, light air and variable. P.M. an albatross. A.M. an albatross. G var. 2 az. 8° 54¾. amp. 9° 9¾. Bar. 2 P.M. 30.3¾. 4. 30.2¾. 6. 30.3¾. 7½. 30.3¾. 11. 30.3¾. Mostly calm. Some birds at distance. G var. az. 8° 38¾. Bar. 2 P.M. 30.3¾. 8. 30.3¾. 10. 30.3¾. 8 A.M. 30.3¾. 8½. 30.3¾. 9. 30.3¾. Fresh gales, with squalls and rain; sometimes squalls very hard. Great irregular swell. Several birds, chiefly poor Johns or black shearwaters, being of the colour of the former, and shape like the latter, but without white breasts. Bar. 2 P.M. 30.3¾. 5. 30.2¾. 6. 30.2¾. 8. 30.3¾. 12. 30.2¾. 9 A.M. 30.3¾. Fresh gales and squally. Several shearwaters, or birds like them, of different colours, grey, brown, and blackish; some white breasted and white under the wings. Bar. very unsteady these two days from ship's motion. Great irregular sea. Bar. 2 P.M. 30.2¾. 2½. 30.3¾. 4. 30.2¾. 6. 30.2¾. 10¼. 30.3¾. 12. 30.3¾. 8 A.M. 30.2¾. 9. 30.2¾. 10. 30.2¾. | Date | Marine Barometer | Weather and Winds | Longitude | |------|------------------|-------------------|-----------| | | R. S. Th. D. | | D. L. A. O. T. K. | | Oct. | In. Dec. In. Dec. | | N S W E | | 28 | 72 30.2½ 30.2 | | | | | f q. f q. r. | E. E by S. | | | | f q. | E by S. | | | | f q. c. f q. | ESE. E by S. | 16 | | | f q. h. | E by S. ESE. | | | 29 | 73 30.2½ 30.2 | | | | | c. | ESE. E by S. ESE. | | | | c. | E by S. | | | | c. f q. h. | ESE. E by S. | 2 | | | h. f. | E by S. ESE. E by S. | | | 30 | 75 30.2 30.1½ | | | | | f. f q. | ESE. E by S. | | | | f q. c. | ESE. E by S. | | | | c. | E by S. | | | | c. | E by S. | | | 3½ | 77 30.1 30.0½ | | | | | h. | ESE. E by S. | | | | h. f q. | E by S. | | | | f q. r. f q. | E by S. E. | | | | f q. | E. E by N. | | | Nov. | 1 78 30.1 30.0¼ | | | | | h. f q. r. | E. VE. | | | | f q. r. h. | E. | | | | h. f q. h r. | E. VEY. | 1 | | | f q. c. | VEY. | | | 2 | 81 30.0¼ 30.0¼ | | | | | h. | E by N. | | | | h. | E by S. E by N. | | | | h. | V. E. E by N. | 10 | | | h. f. | E by N. E. | | | 3 | 81 30.0½ 30.0 | | | | | f. c. | E. | | | | c. | E. | | | | c. f. | E. | | | | f. | E. | | | 4 | 82 30.0¼ 29.9¾ | | | | | t. c. | E. E by S. E. | | | | c. f. | E. | | | | f. | E. | | | | f. | E. | | | 5 | 82 30.0 29.9½ | | | | | h. | E. | | | | h. | E. | | | | h. f. | E. V. E. | 7 | | | f. | E. | | | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetical | |------|------|------|--------------------------|----------|------------|------------| | | | | | | | Variation | | | | | | | | South Dia. | | | | | | | | Face | | | | | | | | E. W. | | | | | | | | Az. Amp. | | | | | | | | | | | | | | | | | The table provides data on longitude from Greenwich, latitude, corrected longitude, magnetic variation, and magnetic declination for various locations. The entries include numerical values such as 76.9, 79.10, etc., indicating measurements in degrees and minutes. | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | E. | W. | MD. | C.D. | | W | W | 3443 | | 96 | Mostly fresh gales from Eastward, with squalls and rain and a large swell. Several birds as before. A.M. many flying fish. Bar. very unsteady, 1 P.M. 30.2½. 4. 30.1½. 5½. 30.2½. 6. 30.2½. 8. 30.2½. 10. 30.2½. 12. 30.2½. 9 A.M. 30.2½. | | 93 | Fresh gales, with some squalls. Several birds as before. P.M. a large white bird which flapped its wings and flew high, unlike the birds which are found in the main seas. G long. O and C 77° 39' E. Bar. 2 P.M. 30.1½. 4. 30.1½. 6. 30.1½. 10. 30.2½. 11½. 30.2½. 8 A.M. 30.2½. 9. 30.2½. | | 113 | Strong gales, with frequent squalls. Some birds as before. Vast flocks of flying fish. Swell abated. Bar. 2 P.M. 30.2½. 3. 30.1½. 4. 30.1½. 10½. 30.2½. 12½. 30.2½. 8 A.M. 30.1½. 9. 30.1½. | | 127 | Squally. Few birds as before. Swell increased and weather unsettled. G long. O and D 79° 8' E. Bar. 2 P.M. 30.1½. 4. 30.1½. 6. 30.0½. 10. 30.1½. 11½. 30.1½. 6 A.M. 30.0½. 8. 30.0½. 9. 30.0½. | | 114 | Squally. P.M. a tropic bird, which resembles a parrot in shape, but is of a whitish grey. Swell much abated. G long. O and C 79° 10' E. Bar. 2 P.M. 29.9½. 4. 30.0. 6. 30.0. 9½. 30.0½. 12½. 30.0. 9 A.M. 30.0½. | | 92 | Moderate breezes, with some squalls. A.M. few birds; the grey white under wings; frequently overcast. A.M. a little more swell from Northward. G var. 29° 3½', amp. 29° 4½'. Bar. 2½ P.M. 29.9½. 6. 30.0. 12½. 30.0½. 8 A.M. 30.0½. 9½. 30.0½. 11½. 30.0½. | | 123 | Pleasant gale, with fair weather. A.M. a bird, larger than a tropic bird, with black wings and white body at a distance; it flapped the wings very much. A head swell. C var. az. 10° 6½'. 0° 52½'. Bar. 2 P.M. 30.0½. 6. 30.0½. 7½ A.M. 30.0½. | | 114 | Major part moderate. P.M. some Southern lights, very rare and motionless. Bar. 2½ P.M. 29.9½. 6. 29.9½. 8. 30.0. | | 119 | Fresh gales, with fair weather. P.M. a large bird of the booby kind above the ship; it had a long neck, and was something in shape and size like a wild goose. At night, Southern lights, some diverging in rays downwards, some like a rare cloud, very little motion; a faint ring round C. A.M. four tropic birds. G var. 4° az. 6° 21' E. az. 6° 20' 4' E. Bar. 2½ P.M. 29.9½. 6. 29.9½. 1 A.M. 29.9. 8. 29.9½. | * D d d 12 | Th. | Marine Barometer | Weather and Winds | D.L. | Longitude | |-----|------------------|-------------------|------|-----------| | | R. S. Th. D. | | | | | | In.Dec. In.Dec. | | | | | Nov.6 | 2½ 30.0 29.9 82½ 29.9½ | c. E. | | | | | | c. E. | | | | | | c. E. E by N. E. | | | | | | c. E by N. E. | | | | 7 | 83 30.0 29.9 82½ 29.9 | h. E. E by S. | | | | | | h. E. E by S. | | | | | | h. ESE. | | | | | | c. SE by E. | | | | | | h. SE by E. | | | | | | h. E by N. ENE. E. | | | | | | h. sq. E. E by S. | | | | | | f. E by S. | | | | | | f. V. E. | | | | | | f. E by N. E. | | | | | | f. hr. dr. E. E by N. V. | | | | | | c. E. | | | | | | c. E by S. E. E by S. | | | | | | c. r. c. V. | | | | | | c. V. E by N. E by S. | | | | | | c. sq. E by S. SE by E. SE by E. | | | | | | h. c. SE by E. | | | | | | c. E by S. ESE. E by S. | | | | | | c. E by S. E. E by S. | | | | | | sq. hr. c. ESE. V. | | | | | | sq. r. V. | | | | | | r. L. to nw. f. V. | | | | | | c. sq. r. L. to e. V. E by N. | | | | | | sq. r. V. NE. V. | | | | | | c. r. c. C. V. C. | | | | | | c. hr. c. L. to s. C. | | | | | | c. C. | | | | | | c. sq. r. c. C. V. NW. V. | | | | | | c. sq. hr. NW by W. V. | | | | | | c. V. NW. C. | | | | | | c. C. V. W by S. | | | | | | c. r. c. W by S. SW. SSW. | | | | D.L. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip. | |------|--------------------------|----------|------------|-----------|------------| | A.O. | TK. | D.T.K. | S.O.D. | Az. | Amp. | Face | MD. | | N.S.W.E | A. | TK. | D.T.K. | S.O.D. | A. | O. | E. | W. | | 18 | 80.48 | 82.22 | 75 | 81.7 | 5 | *F37 | 8.24 | 3.44 | 81.22 | *O.8 | 26.2 | 26.6 | 26.4 | | 9 | 81.46 | 82.49 | 6.19 | 2.30 | 81.43 | 1.12* | 1.6* | 24.4 | 25. | 24.6 | | 17 | 82.12 | 82.55 | 5.17 | 1.11 | 81.43 | 22. | 22.2 | 22.1 | | 14 | 82.31 | 82.21 | 4.20 | 0.18 | 81.3 | 20. | 20.4 | 20.2 | | 3 | 83.19 | 82.24 | 3.18 | 0.47 | 81.0 | 0.52* | 19.4 | 19. | 19.4 | | SE by E. | 84.5 | 82.37 | 2.3 | 2.1 | 81.7 | 15.4 | 15.6 | 15.5 | | 32 | 84.25 | 82.25 | 1.12 | 2.52 | 80.49 | 15.4 | 16. | 15.6 | | 2 | 84.33 | 82.14 | 95 | 80.39 | 3 | 0.28 | 1.12 | 2.54 | 80.32 | 14.4 | 15.4 | 15. | | 2 | 85.0 | 82.39 | 1.7 | 2.59 | 80.51 | 15. | 16. | 15.4 | ### Magnetic Observations | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face E. | W. | MD. | C.D. | | | 4434 | Moderate breezes. Northern lights to Northward. Little motion, but great extent, and afterwards Southern lights. G var. amp. 0° 48' *E. Bar. 2 P.M. 29.94. 1 A.M. 29.94. 9. 30.0. | | 101 | Not steady, ship laying to lar boat. | | 89 | Moderate breezes. G var. az. 0° 45' *E, amp. 0° 13' *E. Bar. 2 P.M. 30.0. 6. 29.94. 1 A.M. 29.94. 8. 29.94. | | 69 | Major part, moderate breezes. A.M. came on board from the Canton Major Sears and Capt. Alcock for Madras; Mr. Horsley went aboard that ship for Bombay. Bar. 2 P.M. 29.9. 12. 29.94. 9 A.M. 29.94. | | 61 | Variable winds, with rain at times. Bar. 4 P.M. 29.84. 9 A.M. 29.74. | | 81 | Mostly fresh breezes. At 10½ A.M. there was to the SE. the appearance of something black like a rock, and at the same time like a shoal; but it being to windward, and ship having fresh way, could not determine whether it was a shoal or the reflection of the Sun behind the clouds. This is nearly the situation of the Ouro. A man sent to mast-head could not see any thing. Bar. 2 P.M. 29.84. 9. 29.84. 12. 29.84. | | 82 | Most part the wind Easterly, with some squalls towards the latter end. Bar. 1 A.M. 29.9. 8. 29.94. | | 61 | Winds variable with unsettled weather. P.M. a bird like a land bird. A.M. many yellow tails; two black birds at a distance like land birds; a white bird with black wings, like a gull. Bar. 2 P.M. 29.84. 4. 29.84. 9. 29.9. 12. 29.9. | | 8 | Light airs and calms, with hard rain. Many fish, porpoises, &c. A.M. a mottled grey bird of the booby kind. The O's limb not distinct when longitude observed. Bar. 2 P.M. 29.84. 12½. 29.84. 7½ A.M. 29.84. 8½. 29.94. | | 28 | Winds and weather very unsettled. P.M. a sea bird like a plover; many fish. P.M. caught a shark. A.M. saw a sail. Bar. 2 P.M. 29.84. 4. 29.84. 12½. 29.9. 8 A.M. 29.94. 11½. 29.9. | --- *Note:* The observations are recorded in a logbook kept by Alexander Dalrymple in 1775. | Th. | Marine Barometer | Weather and Winds | D.L. | Longitude | |-----|------------------|-------------------|------|-----------| | | R. S. Th. D. | | | | | Nov.15 | 81½ 29.9½ 29.9 81½ 29.8½ | c. fq. r. fq. hr. V. c. fq. r. V. W by N. "W" by S. r. fq. r. c. W by S. SSE. SSW. c. SW. c. fq. hr. SW. S. hr. V. S by W. hr. c. S by W. SW. c. r. c. SW. | 19 2 | 86.9 8.4 | | Nov.16 | 81 30.0 29.9½ 80½ 29.9 | fq. hr. c. fq. S. V. c. hr. c. fq. hr. S by W. SSE. SE. fq. hr. V. S by E. r. c. S by E. C. | 9 6 | 87.5 8.4 | | Nov.17 | 80 29.9½ 29.9 80 29.8½ | fr. c. C. E. E by S. c. r. E by S. r. c. E. E by N. NE by E. c. fq. NE by E. NE by N. N by E. | 21 18 | 88.2 8.6 | | Nov.18 | 83½ 30.0 29.9½ 83½ 29.9 | c.fq.r.fq.th,L.hr.NNW. NW. V. fq. th, L. hr. V. C. V. C. r. c. V. N. c. r. c. N. N by E. NE by N. | 6 9 | 88.16 8.6 | | Nov.19 | 83 29.9¾ 29.9 83 29.8½ | fq. fr. fq. NE by N. NE. fq.fq,L.hr.hr. NEbyE.EbyN.NEbyE.ENE. NE. hr. fq. V. SE by E. SE. SSE. c. fq. flying fh. SSE. S by W. | 18 19 | 88.57 8.7 | | Nov.20 | 82½ 30.0 29.9½ 82½ 29.9 | r. SW. V. r. L. to nw. V. C. V. h. V. C. h. r. h. C. V. W. V. N. | 30 13 | 90.27 8.9 | | Nov.21 | 80½ 30.0¼ 29.9¾ 80½ 29.9¾ | c. fq. N. N by W. fq. hr. c. r. N by W. C. SE by S. V. r. V. r. c. NE by E. C. | 15 27 | 90.54 9.0 | | Nov.22 | 81½ 30.0 29.9½ 81½ 29.9 | c. C. E. V. c. V. E by N. c. h. NE by E. NE. h. NE by E. NE. NNE. | 14 55 | 91.17 9.1 | | Nov.23 | 82 29.9½ 82 | 6 8 | 91.8 9.1 | | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip. | |--------------------------|----------|------------|-----------|------------| | D.L. A.O.T.K. | N S W E | TK. D.T.K. | S. O. E. | Az. Amp. | Face | E. W | MD | | 86.9 83.46 | 0° 57' 2° 50' | 81.52 | 14.4 14.6 | 14.5 | | | 87.5 84.48 | 0° 46' 2° 52' | 82.48 | 13.4 14. | 13.6 | | | 88.2 86.3 | 0° 32' 3° 27' | 83.57 | 14.4 15.2 | 14.7 | | | 88.16 86.26 | 0° 3' 4° 2' | 84.13 | 11.1 11.5 | 11.3 | | | 88.57 87.26 | 0° 3' 3° 44' | 85.7 | 10.6 11.2 | 11. | | | 90.27 89.9 | 0° 17' 3° 0' | 86.40 | 11.4 12.2 | 11.7 | | | 90.54 90.3 | 0° 3' 3° 29' | 87.28 | 10.2 10.6 | 10.4 | | | 91.17 91.21 | N 0° 9' 3° 55' | 88.39 | 10.6 11.2 | 11. | | | 91.8 91.20 | 0° 45' 4° 37' | 88.31 | 7.6 8.4 | 8.1 | | | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | MD. | C.D. | E. | W | ML. | | 14.4 | 14.6 | 14.5 | 15.4 | 5014 | | 13.4 | 14. | 13.6 | 14.5 | Very steady. | 57 | | 14.4 | 15.2 | 14.7 | 15.6 | 59 | | 11.1 | 11.5 | 11.3 | 12.2 | Pretty steady. | 38 | | 10.6 | 11.2 | 11. | 11.7 | 44 | | 11.4 | 12.2 | 11.7 | 12.6 | Not very steady. | 102 | | 10.2 | 10.6 | 10.4 | 11 | Very steady. | 30 | | 10.6 | 11.2 | 11. | 11.7 | Very steady, but ship not having steerage way. | 39 | | 7.6 | 8.4 | 8.1 | 9. | Very steady. | 5484 | Mostly variable wind and rain. P.M. a sail shewed French colours on firing a gun to speak with her, but did not shorten sail. Several birds and many fish. Bar. 2 P.M. 29.8½. 6. 29.9½. 12. 29.9½. 8 A.M. 29.9½. First part, mostly squally with very heavy rain. Middle and latter, light airs and cloudy with some rain. O's limb not very distinct when long observed. Bar. 2 P.M. 29.8½. 4. 29.8½. 10. 29.9½. 12. 29.9½. 8 A.M. 29.9½. 9. 30.0. Very unsettled weather with rain. Bar. 1 P.M. 29.9½. 2. 29.9½. 4. 29.9½. 9½. 30.0. 1 A.M. 29.9½. 9. 29.9½. At first the dipping needle had no motion, but with the face East was at 12°; when moved a little, it remained motionless; when moved with the face to West, the needle turned round, and stood any where. Moved several times; it pointed with face E 14½° W 15½°. Very steady. Mostly light breezes. P.M. saw two dolphins, heard a tropic bird in night. A.M. caught two dolphins. Dipping needle pretty steady, and no appearance of defect as yesterday. Bar. 2 P.M. 29.8½. 4. 29.8½. 12. 29.9½. 8 A.M. 29.9½. 11. 29.9½. Variable winds with rain. P.M. a swallow with short wings and white breast. A.M. a small land bird shaped like a water wag-tail, but in colour like a linnet, with a few yellowish feathers in the flank. A.M. a bird at distance like a gannet. Bar. 2 P.M. 29.8½. 4. 29.8½. 6. 29.8½. 1 A.M. 29.9½. 8. 29.9½. Fresh breezes, with some squalls and a great deal of rain. The land bird aboard still. P.M. heard a bird, supposed to be a booby. A.M. passed a drift; a grey sea bird shaped like a plover. A black sea bird at a distance. Bar. 1 P.M. 29.8½. 6. 29.8½. 1 A.M. 29.9½. 7½. 29.9½. 9½. 29.9½. 10. 29.9½. 11. 29.9½. 11½. 29.9½. Variable, with rain and calms. The land bird aboard still. A.M. saw a tropic bird. Passed a drift. Light airs. Bar. ½ P.M. 29.9½. 2. 29.9½. 4. 29.9½. 6. 29.9½. 7. 29.9½. 12½ A.M. 29.9½. 8. 29.9½. 10. 30.0. Major part, light breezes, with some rain. The land bird aboard still. P.M. saw a booby, some fish of the porpoise kind. A.M. a horse fly, several ripplings, and many fish. Water luminous at night. Bar. 4 P.M. 29.9½. 5. 29.9½. 12½ A.M. 29.9½. 7. 29.9½. 8½. 30.0. 9. 30.0. 10½. 30.0. First part, calm. Latter, light breeze from NE. with hazy weather. The land bird aboard still. A.M. several tropic birds. Passed a bamboo adrift. Water luminous at night. Bar. 4 P.M. 29.9½. 6. 29.9½. 14½ A.M. 29.9½. 8. 29.9½. 9. 30.0. | Th. | Marine Barometer | Weather and Winds | D.L. | Longitude from | |-----|-----------------|------------------|------|---------------| | | R. S. Th. D. | | | | | 1775| In.Dec. In.Dec. | | | | | Nov.24| 82½ 30.0¼ 29.9 82½ 29.9 | f. NNE. NE by N. NE. | 1032 | E E | | | | f. NE. | | | | | | r. f. NE by N. | | | | | | f. sq. r. c. NE. | | | | 25 | 82 30.0¼ 29.9¾ 82 29.9¾ | c. sq. NE V. | 1943 | 90.13 89.10 | | | | sq. c. r. V. E by N. | | | | | | sq. r. V. ENE. | | | | | | sq. c. sq. NE by E. NE. | | | | 26 | 82 30.0¼ 29.9¾ 81½ 29.9¾ | sq. fr. c. sq. r. V. NE. V. | 830 | 90.19 88.46 | | | | sq. r. sq. c. NE. V. | | | | | | c. V. NE by E. | | | | | | c. sq. NE. NE by E. V. | | | | | | sq. sq. r. NE. V. | | | | | | c. L. all round. V. E by N. | 355 | 90.48 88.20 | | | | sq. h. L. all r. E. E by N. | | | | | | h. E by N. | | | | 28 | 84½ 29.9¾ 29.9¾ 84½ 29.9 | c. E by N. | 420 | 90.50 88.2 | | | | c. E by N. ENE. E by N. | | | | | | c. sq. E by N. E. | | | | | | sq. c. E by N. | | | | 29 | 84½ 30.0¼ 30.0 84½ 29.9¾ | sq. r. c. sq. V. E. | 1513 | 90.39 87.38 | | | | sq. r. c. V. ENE. | | | | | | c. ENE. | | | | | | c. h. NE by E. ENE. NE by E. | | | | D.L. | A.O. | T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip | |------|------|------|--------------------------|----------|------------|-----------|-----------| | N | S | W | E | N | E | Az. | Face | | | | | | | | Amp. | E. | | | | | | | | | W. | | | | | | | | | MD. | | | | | | | | | C.D. | | 10°32' | 90°29' | 90°9' | 1°37' | 5°19' | 88°13' | 0°53* | 7° | 7°2 | 7°1 | 8° | 7°4 | |--------|--------|-------|-------|-------|--------|-------|----|----|----|----|----| | 19°43' | 90°13' | 89°10' | 2°50' | 6°13' | 87°7' | | 8°2 | 8°4 | 8°3 | 9°2 | | | | | | | | | 6°2 | 6°4 | 6°3 | 7°3 | | | | | | | | | 5°6 | 6°2 | 6° | 6°7 | | | | | | | | | 5° | 5°4 | 5°2 | 6°1 | | | | | | | | | 4°4 | 5° | 4°6 | 5°5 | | 8°30' | 90°19' | 88°46' | 3°23' | 6°38' | 86°36' | | 5°4 | 6°2 | 5°7 | 6°6 | | 3°55' | 90°48' | 88°20' | 7°9 | 87°1 | 5° | 4°3 | 3°28' | 6°40' | 86°3 | | 4°20' | 90°50' | 88°2 | 14°2 | 85°40' | 6° | 3°8 | 4°46' | 8°2 | 85°40' | | 15°13' | 90°39' | 87°38' | 1°52 | 85°6 | 5° | 3°7 | 5°57' | 9°28' | 85°10' | | ND. | ND. | ND. | ND. | ND. | ND. | ND. | ND. | ND. | ND. | ND. | ND. | |-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----| | 0°4 | 1° | 0°6 | 1°5 | | 0°2 | 0°6 | 0°4 | 1°3 | | 0°0 | 0°4 | 0°2 | 1°1 | | 0°2 | 0°2 | 0°0 | 0°7 | | 1°2 | 1°6 | 1°4 | 0°5 | | 1°2 | 1°4 | 1°3 | 0°4 | ### Magnetic Observations | Variation | South Dip | ML | |-----------|-----------|----| | | Face | | | | MD.C.D. | | | Amp. | E. | W. | | 0° | | | | 0.53* | 7.4 | 6.4 | | | 7.2 | 6.6 | | | 7.1 | 6.5 | | | 8 | 7.4 | | | | | | | h. m. | N.lat. Long. | | | 11.0 PM | 4.39 88.29 | | | 9.0 AM | 5.21 88.26 | | | | | | | Very steady. | | | 1.0 PM | 5.17 88.18 | | | 9.15 | 5.23 88.10 | | | 12.30 AM | 5.45 88.11 | | | 9.10 | 6.4 87.25 | | | 0.30 PM | | | | 5.4 | 6.2 | | | 5.7 | 6.6 | | | Very steady. | | | 4.2 | 4.6 | | | 4.4 | 5.3 | | | Very unsteady. | | | 3.0 AM | 7.20 86.2 | | | 0.30 PM | 8.5 85.40 | | | Very steady. | | | 0.4 | 1.0 | | | 0.6 | 1.5 | | | 0.2 | 0.4 | | | 1.3 | 0.2 | | | 1.1 | | | | ND. | ND. | | | ND. | ND. | | | ND. | ND. | | | Very steady. | | | 1.0 AM | 8.35 85.36 | | | Pretty steady. | | | 9.0 | 9.14 85.15 | | | 0.45 PM | Not very steady. | --- **Notes:** - Moderate breezes, and mostly fair. The land bird aboard still. A.M. saw a ship, the Dudley, Capt. BARRINGTON, from Madras to the Nicobars and Pegu; the Captain came on board. At 10 saw another ship. Bar. 6 P.M. 29.9. N.B. Standing to SW. from 10 A.M. to 1 P.M. the dipping needle increased in dip, the distance not above 10 miles. - Winds from NE. with frequent squalls and rain. The land bird aboard still. 1 P.M. spoke the ship Floyer, from Madras to Malay Coast, Capt. RICH. Water luminous. Sea bird shaped like plover, grey with upper part of head black, and wings tipped with black. Same bird seems to have been about ship several days. Bar. 5 P.M. 29.9. 6. 29.9. 1 A.M. 29.9. 8. 30.0. 9. 30.0. 11. 30.0. - Fresh gales and squally throughout. The land bird aboard still. Sea very luminous. P.M. a small new came on board. Bar. 2 P.M. 29.9. 10. 30.0. 1 A.M. 29.9. 8. 30.0. - Winds most Easterly, with squalls and rain. Sent a boat on board a country snow with red colours; she was bound from Trankillo to Achern. Sight not very good. Bar. 4 P.M. 29.9. 6. 29.9. 12 A.M. 29.9. 8. 29.9. 11. 29.9. - Moderate breezes, and mostly cloudy. Bar. 2 P.M. 29.9. 4. 29.9. 6. 29.9. 12 A.M. 29.9. 8. 29.9. 11. 29.9. - Increasing breeze from Eastward, with squally weather and rain. Bar. 3 P.M. 29.9. 4. 29.9. 6. 29.9. 1 A.M. 29.9. 9. 30.0. 10. 30.0. | Date | Marine Barometer | Weather and Winds | Longitude | |------|------------------|-------------------|-----------| | Nov. 30 | 84½ | In.Dec. | NE by E. | | Dec. 1 | 78 | 30.0 | ENE. | | Dec. 2 | 82½ | 30.0 | NE by E. | | Dec. 3 | 83½ | 30.0 | NNE. | | Dec. 4 | 83 | 30.0 | NE by N. | | Dec. 5 | 84 | 30.0 | NNE. | | Dec. 6 | 83 | 30.0 | NE by N. | | Dec. 7 | 80½ | 30.0 | NE by E. | | Dec. 8 | 81½ | 31.0 | NE by E. | | D.L. | A.O. | T.K. | |------|------|------| | N | S | W | E | | A. | T. | | Date | Marine Barometer | Weather and Winds | Longitude | |------|------------------|-------------------|-----------| | Nov. 30 | 84½ | In.Dec. | NE by E. | | Dec. 1 | 78 | 30.0 | ENE. | | Dec. 2 | 82½ | 30.0 | NE by E. | | Dec. 3 | 83½ | 30.0 | NNE. | | Dec. 4 | 83 | 30.0 | NE by N. | | Dec. 5 | 84 | 30.0 | NNE. | | Dec. 6 | 83 | 30.0 | NE by N. | | Dec. 7 | 80½ | 30.0 | NE by E. | | Dec. 8 | 81½ | 31.0 | NE by E. | | D.L. | A.O. | T.K. | |------|------|------| | N | S | W | E | | A. | T. | | D.L. | A.O.T.K. | Longitude from Greenwich | Latitude | Cor. Long. | Magnetic | |------|----------|-------------------------|----------|------------|----------| | N | S | W.E. | A. | T.K. | D.C. | S.O.D. | Az. | Amp. | Face | E.W. | MD | | 11 | 5 | 90.15 | 87.19 | 7.13 | 10.55 | 84.55 | 4.4 | 4.2 | 4.2 | | 6 | 90.36 | 87.34 | | | | | 3.6 | 4.2 | 4.2 | | 9 | 91.20 | 88.13 | | | | | 2.2 | 2.6 | 2.4 | | 8 | 92.4 | 89.6 | 97 | 87.29 | *A43 | | 3.3 | 3.6 | 3.3 | | 4 | 92.16 | 89.21 | 116 | 87.25 | *A12 | | 5.4 | 5.6 | 5.5 | | 2 | 91.58 | 89.8 | | | | | 6.6 | 7.2 | 7.2 | | 9 | 91.16 | 88.17 | 137 | 86.0 | *P28 | | 7.6 | 8.2 | 8.2 | | 12 | 89.26 | 86.10 | | | | | 8.6 | 9.2 | 9.2 | | 12 | 87.9 | 83.50 | 188 | 80.42 | *A36 | | 9.2 | 9.6 | 9.4 | *Note: The table contains data related to longitude from Greenwich, latitude, corrected longitude, magnetic variation, azimuth, amplitude, face, east-west direction, and magnetic declination. | Variation | South Dip | ML | |-----------|-----------|----| | Az. | Amp. | Face | E. | W. | MD. | C.D. | | 45° 55' | 4. | 4.4 | 4.2 | 3.3 | Very steady. | | 55° 15' | 3.6 | 4.2 | 4. | 3.1 | Pretty steady. | | 55° 58' | 2.2 | 2.6 | 2.4 | 1.5 | Not steady. | | 6° 49' | 3. | 3.6 | 3.3 | 2.4 | Not very steady. | | 7° 2 | 1.32* | 1.41* | 5.4 | 5.6 | 5.5 | 4.6 | Very steady. | | 6° 47' | *1.12 | *1.22 | 6.6 | 7.2 | 7. | 6.1 | Very steady. | | 6° 44' | 7.6 | 8.2 | 8. | 7.1 | Pretty steady. | | 6° 45' | 8.6 | 9.2 | 9. | 8.1 | Pretty steady. | | 6° 23' | 9.2 | 9.6 | 9.4 | 8.5 | Very steady. | Moderate breezes, and mostly hazy. Bar. 3 P.M. 29.9½. 5½ A.M. 30.0. Variable winds and weather, with much rain. A.M. a small land bird, probably same we lost some days ago. Bar. 1 P.M. 30.0. 3. 29.9½. 4. 29.9½. 6. 29.9½. 9½. 30.0. 12½ A.M. 29.9½. 7½. 30.0. 8. 30.0. 8½. 30.0. First part, squally with rain. Past 6 P.M. weather looked very black and threatening, but the barometer did not fall, and it came to nothing. Middle and latter, moderate A.M. the same land bird. Bar. 2 P.M. 29.9½. 2½. 29.8½. 4. 29.9. 6. 29.9. 9½. 30.0. 12½ A.M. 29.9½. 6. 29.9. 7½. 29.9½. 8½. 29.9½. 11½. 29.9½. Decreasing breeze, with pleasant weather. A.M. the same land bird. A small mew about ship. Bar. 2½ P.M. 29.9. 4. 29.9. 7. 29.9½. 12. 29.9½. 7 A.M. 29.9½. 7½. 29.9½. Mostly light airs. A.M. the same land bird. Bar. 2 P.M. 29.8½. 6. 29.8½. 10. 29.9½. 12. 29.9½. 7 A.M. 29.9. Light breezes. A.M. the same land bird. P.M. a land bird, it flew like an owl. Bar. 3 P.M. 29.9. 4. 29.9½. 7. 29.9½. 7 A.M. 29.9½. 11½. 29.9½. First part, moderate breezes. Middle and latter, squally. The same land bird on board. A land bird on board. Saw a snow standing to N'd: it hoisted English colours. Bar. 4 P.M. 29.9½. 7½. 30.0. 7½. in squally, 29.9½. 10. 30.0. 12½ A.M. 29.9½. 12½ before hard rain, 29.9½. 29.9½. 8½. 30.0. 9½. 30.0. Fresh gales, with pleasant weather. The same land bird on board. A mottled bird came on board. Bar. 3½ P.M. 29.9½. 4. 29.9½. 6. 29.9½. 10. 30.0. 8 A.M. 30.0. 11. 30.0. Fresh breeze throughout. A small land bird aboard. Bar. 2½ P.M. 29.9½. 4. 30.0. 6. 30.0. 1 A.M. 30.0. 30.0½. 9. 31.0½. * D d d 14 | Th. | Marine Barometer | Weather and Winds | D.L. | Longitude | |-----|-----------------|------------------|------|-----------| | | R. S. Th. D. | | | | | 1775| In.Dec. In.Dec. | | | | | cc. | 9 80 | | | | | | 30.1 79½ | | | | | | h. ENE. | | | | | | h. ENE. | | | | | | h. E. | | | | | | h. E. ENE. | | | | At anchor in Madras Road, in the Grenville's cuddy (cabin before the round-house) Ashore, in the fort of the Company's house near the church, Ditto, Ditto, By the latitude observed at noon, the 9th of December, and the bearings of Pulicat Flag staff, we were then from Fort St. George, Longitude of Fort St. George, by eclipse of Jupiter's first satellite, Longitude of 9th noon, by map, Longitude by mean of 52 observations, Difference, N.B. There being a very considerable difference in the position of Fort St. George, Lat. 13. 8° N. 7th Oct. 1776, A.D. on board the Swallow sloop of war by a Hadley made by Bird. 13. 8° 1761, Rev. Mr. Hirst, many obs. made not long ago with an excellent quadrant (vide Ph. Tr. vol. LII. part I. p. 396). N.B. It does not clearly appear whether these obs. were made by Mr. Hirst or by some other person. 13. 8° Several observations by Mr. William Nicholson, master of the Elizabeth man of war, p. 48. Remarks and Observations made on a voyage to the East Indies. 13. 7° Major James Rennell, surveyor-general of Bengal. 13. 4° Major William Stevens, chief engineer of Fort St. George. 13. 4° Rev. Mr. William Smith, alt. of *°, some to Northward, some to Southward. By a survey which has been made of the country from Fort St. George to Alliaparca, Alliaparca is 17 statute miles, or from Pondicherry, by M. Dapriez, Alliaparca is Fort St. George Eastward of Pondicherry, To The East-Indies, in the Ship Grenville, Capt. BURNET ABERCROMBIE, kept by ALEXANDER | Longitude from Greenwich | Latitude | Cor. Long. | Variation | South Dip. | |--------------------------|----------|------------|-----------|------------| | D.L. A.O. T.K. | | | | | | N S W E | A. TK. | D. D. T.K. | S. O. D. | A. O. | | | | | | | | | | | | | | | | | | | | | | | | | Magnetical | Variation | South Dip. | |-----------|------------| | Az. | Amp. | | E. | W. | | MD. | | N.B. All the observations of the dip were made with the needle standing on the table in the ship's round-house towards the starboard side, except 2d, 3d, 6th, and 8th of October, and 10th and 28th of September, and 1st of October 1776. Longitude 9th noon by map. Longitude by Time-keeper. Error of Time-keeper since 18th Sept., in 83 days. I have annexed a view of them. Long. from Greenwich. Hon. Thomas Howe, eclipse of Jupiter's first satellite, 5th July 1755. A.D. mean of 52 observations, compared together by the Time-keeper, in this Journal. Rev. Mr. Hirst, Transit of Venus 1761. Rev. Mr. Smith, by Dr. Maskelyne's calculation, Em. 27th May 1777. Ditto, by Mr. Smith's calculation. Pondicherry, by M. Le Gentil 1769, is in 11° 55' 42" N. 79° 52' 30" E long. from Greenwich. Which places Fort St. George in ### Magnetic Observations | Variation | South Dip | |-----------|-----------| | Az. | Amp. | Face | MD | CD | | E | E | E | E | E | | ML | |----| | 6624 | N.B. All the observations of the dip were taken with the needle standing on the table in the Grenville's round-house towards the starboard side of the ship, except 2d, 3d, 6th, and 8th of October 1775; and 10th and 28th of September, and 3d of October 1776. --- ### Weather Log **9th December** - Pleasant gale. At 2½ P.M. had soundings, 2S fath. gravelly sand; and at day-light saw the land bearing SW by W. | Weather | Winds | Course | K.F. | Soundings | |---------|-------|--------|------|-----------| | 2 | E | WSW | SbESE | 1 | 12. gravelly sand. | | 3 | SSE | 2 | 16½ | 18. 17½ | ditto. | | 4 | SSE | 2 | 25½ | 26. ditto. | | 5 | SSE | 2 | 25½ | 26. blue mud. | | 6 | SSE | 2 | 25½ | 26. ditto. | | 7 | SSE | 2 | 26. 27. ditto. | | 8 | SSE | 2 | 27. 26. 25. | | 9 | SSE | 3 | 25. 24½. | | 10 | SSE | 2 | 23. 21. 20. 19. 18. | | 11 | SSE | 2 | 18. 17½. 17½. 17. | | 12 | SSE | 4 | 18. to 25. | At 6h. 30. Armegon Hill, W 13° N 10 or 12 miles off shore. Southernmost part in Pulicat Ridge in sight, SW. The extreme in haze. At 9h. 40. A Hill or Grove, W 11° S. - R 18½ Sandy Point of Armegon. - 35½ White Building. - 43½ Ext. in sight to the Northward. - L 4½ Highest Peak of Pulicat Ridge. - 14½ Kettle Bottom, ditto. - 22½ Ext. in sight to the Southward. At noon, *Pulicat* Flag-staff, S 52° W. - R 33. 6 Kettle Bottom, Pulicat Ridge. - 46½ Highest Peak, ditto. - 50. o Sandy Point. - L 5. o Point to Southward of Pulicat. - 19½ Tuft near South ext. in sight. --- **10th December** | Weather | Winds | Course | K.F. | Soundings | |---------|-------|--------|------|-----------| | 1 | S | 4½ | 27. 23. | | 2 | S by W | 4½ | 12. 13. | At 5h. 30'. Anchored in Madras Road in 10½ fath. - Fort St. George Flag staff, S 31° W, about 4 miles off shore. - R 14½ Obelisk and Punch-house in one. - 18½ Armenian Church. - 49½ White-house on the Sea-beach. - L 18½ Nabob's White Building. - 25. 9 St. Thomas's Mount. - 28½ Triplicane Pagoda. - 29. 6 Peak of 4 Sierras. --- To the Cape - 6732 - 8479 - 15211 ERRATA and ADDENDA in the GRENVILLE In the explanation of weather dr. denotes drizzling rain, and a comma (,) after all the weathers, so separated by comma, are connected: thus, sq, r, th, L. imply lightning: sq. r. th, L. imply squally, rain, thunder and lightning, to have all but not at the same time. In the explanation of the 5th column, for N denoting that the observation reads observation. | Date | D.L. | A.O. | T.K. | Long. from Gr. | Latitude | |------|------|------|------|----------------|----------| | May 2d | - | - | - | - | | | 4th | - | - | - | - | | | 8th | - | - | - | - | | | 9th | - | - | - | - | | | 10th, add 4' to Lat. A till 15th inclusive, and | - | - | - | - | | | 14th | - | - | - | - | | | 15th | - | - | - | - | | | 18th, in column D. T.K. for W read E | - | - | - | - | | | 22d | - | - | - | - | | | 27th, subtract 10' from Lat. A till 20th of June inclusive, and | - | - | - | - | | | June 1st, subtract 10' from Long. A to 25th of June inclusive, and | - | - | - | - | | | 5th | - | - | - | - | | | 9th | - | - | - | - | | | 21st, subtract 11' from Lat. A till 1st July inclusive, and | - | - | - | - | | | 26th | - | - | - | - | | | 27th | - | - | - | - | | | 28th | - | - | - | - | | | 29th, add 13' to Long. A till 2d August inclusive, and | - | - | - | - | | | July 2d | - | - | - | - | | | 3d | - | - | - | - | | | 4th, add 21' to Lat. A. till 19 August inclusive, and | - | - | - | - | | | 24th, add 2' to Long. T.K. till 28th July inclusive, and | - | - | - | - | | | 28th | - | - | - | - | | denotes drizzling rain, and a comma (,) after any weather marked, implies that comma, are connected: thus, sq, r, th, L. imply squally with rain, thunder and squally, rain, thunder and lightning, to have all been in the period of six hours, column, for N denoting that the observation read N denoting that the latitude by | D.L. | A.O. | T.K. | Long. from Gr. | Latitude | Read | |------|------|------|---------------|----------|------| | N | S | W | E | | | | 9 | 31 | 39 | 11 | 20 | 25 | | 18 | 20 | 16.51| 14.1 | 10.2 | 10.6 | | 11.10| 12.18| 3.45 | 15.32 | 16.41 | 14.15| | 18 | 19 | 10.16| 10.20 | 11.24 | 12.31| | 9 | 28.12| 2.13 | 0.22S | 1.6 | 2.34 | | | | | | | | * D d d 15 | For | D.L. | D.L. | Long. from Gr. | Latitude | |-----------|------|------|----------------|----------| | | A. | A.O. | T.K. | A. | O. | | | S | W | E | | | | July 29th, add 6' to Long. T.K. till 10th August inclusive, and Aug. 3d, add 11' to Long. A. to 9th August inclusive, and 10th, subtract 11' from Long. A. till 18 August inclusive; } and subtract 6' from Long. T.K. till 12th August inclusive, } 13th, subtract 4' from Long. T.K. till 18th August inclusive, and 14th, | - | - | - | 27.56 | - | 31.33 | | 19th, | - | - | - | - | - | - | | Sept. 20th, subtract 10' from Long. A. till 8th Dec. inclusive, and 27th, subtract 20' from Lat. A. till 16th Oct. inclusive, and Oct. 17th, subtract 59' from Lat. A. till 22d inclusive. | - | - | - | 21.26 | - | - | | 23d, | - | - | - | - | - | - | | 24th, | - | - | - | - | - | - | | Nov. 5th, | - | - | - | - | - | - | | 9th, | - | - | - | - | - | - | | 11th, | - | - | - | - | - | - | | 18th, | - | - | - | - | - | - | | 19th, | - | - | - | - | - | - | | 20th, | - | - | - | - | - | - | | 21st, | - | - | - | - | - | - | | 22d, | - | - | - | - | - | - | | Dec. 9th, | - | - | - | - | - | - | | 10th, | - | - | - | - | - | - | Note: The table contains instructions for adjusting longitudes and latitudes based on specific dates and times. ### ADDENDA in the Grenville's Journal. | For | D.L. | D.L. | Long. from Gr. | Latitude | Read | |-----|------|------|----------------|----------|------| | | A.O. | T.K. | | | | | | S | W | E | | | | | A. | T.K. | | | | | | A. | O. | | | | - inclusive, and - inclusive, and - inclusive; } and - inclusive, } - inclusive, and - inclusive, and - inclusive, and - inclusive, and - inclusive, and - inclusive, and | | 3 | 27.56 | 31.33 | 3 | 28.2 | 31.3 | |-----|------|-------|-------|------|------|------| | | 13.56| | | 14.7 | 2.19 | 7.22 | | | 2.25 | | | | | | | | 7.26 | | | | | | | | 16 | | | | | | | | 19.9 | | | | | | | | 21.26| | | | | | | | 36.40| | | | | | | | 34.57| | | | | | | | 29.55| | | | | | | | 29.4 | | | | | | | | 21.16| | | | | | | | 36.20| | | | | | | | 33.58| | | | | | | | 29.17| | | | | | | | 28.23| | | | | | | | 1.32 | N | 0.28 | 0.28 | 0.14 | 0.28 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - and | | 86.18| | | | | | |-----|------|-------|-------|------|------|------| | | 86.14| | | | | | | | 86.8 | | | | | | | | 86.2 | | | | | | N. B. The ship having an iron tiller, and much iron about the after part, it was found, the observations taken were not consistent or meriting confidence. From Anjingo they were all taken on the binnacle, which seems fit place in the ship. | Year | Month | Day | Lat. | Long. | Variation | South Dip | Face | MD. | C.D. | |------|-------|-----|------|-------|-----------|-----------|------|-----|------| | 1776 | Oct. 14 | Ashore at Trincomalee on Ceylon. | N 8°32' | E 81°30' | W 3°6' | W 3°6' | E 3°6' | W 4°5' | | | | | At anchor 10 fath. sand and shells, Anjingo Road. | S 8°41' | W 76°54' | 1°12* | 1°13* | 3°4 | 3°4 | 3°4 | 4°3 | Very steady. | | | Nov. 1 | Off Kalpeny. | N 9°57' | W 73°35' | 1°25* | 1°7 | 1°7 | 2°6 | Not very steady. | | | | | Off Seleupar. | N 9°59' | W 72°30' | 1°5 | 1°5 | 1°5 | 2°4 | Pretty steady. | | | | | Lacadive Hill | N 9°38' | W 71°18' | 2°7 | 2°7 | 2°7 | 3°6 | Ditto. | | | | | | N 9°49' | W 70°26' | 1°30* | 3°2 | 3°2 | 4°1 | Ditto. | | | | | | N 9°53' | W 69°11' | 2°12* | 1°54* | 3° | 3° | 3° | 3°7 | Ditto. | | | | | | N 9°55' | W 67°35' | 3° | 3° | 3° | 3°7 | Not very steady. | | | | | | N 10°43' | W 65°30' | 4° | 4° | 4° | 2°3 | Ditto. | | | | | | N 11°57' | W 63°22' | 4°23* | ND | ND | ND | Not steady when near land. | | | | | | N 12°45' | W 60°34' | 5°15* | 3° | 3° | 2°1 | Very unsteady. | | | | | | N 12°59' | W 57°21' | 6° | 6° | 4° | 3°1 | Pretty steady. | | | | | | N 13°29' | W 55°12' | 7°30* | 5° | 5° | 4°1 | Ditto. | | | | | | N 13°16' | W 52°55' | 7°57* | 8°15* | 5°4 | 5°4 | 4°5 | Ditto. | | | | | | N 13°28' | W 50°58' | 9°20* | 8°58* | 5°6 | 6°6 | 5°3 | Very steady. | | | | | | N 13°51' | W 49°37' | 9°35* | 9°32* | 7°2 | 8°6 | 7°1 | Quite steady. | | | | | | N 13°37' | W 48°33' | 9°1* | 9°30* | 8° | 9° | 7°5 | Ditto. | | Magnetic Dip | South Dip | Lat. | Long. | |-------------|-----------|------|-------| | | Face MD.C.D. | | | | Amp. | E. W. | | | | 3° W' | 3.6 3.6 | | | | 1.13° | 3.4 3.4 | 4.3 | Very steady. | | 1.6 | 1.6 1.6 | 2.5 | Pretty steady. | | 0.53° | 2.1 2.1 | 3. | Ditto. | | 1.7 | 1.7 1.7 | 2.6 | Not very steady. | | 1.5 | 1.5 1.5 | 2.4 | Pretty steady. | | 2.7 | 2.7 2.7 | 3.6 | Ditto. | | 3.2 | 3.2 3.2 | 4.1 | Ditto. | | 1.54° | 3. 3. | 3.7 | Ditto. | | 3. | 3. 3. | 3.7 | Not very steady. | | 4.3° | 1.4 1.4 | 2.3 | Ditto. | | ND. ND. ND. | ND. ND. ND.| 0.3 | Not steady, but taken when most at rest. | | 3. | 3. 3. | 2.1 | Very unsteady. | | 6.6° | 4. 4. | 3.1 | Pretty steady. | | 7.54° | 5. 5. | 4.1 | Ditto. | | 8.15° | 5.4 5.4 | 4.5 | Ditto. | | 8.58° | 5.6 6.6 | 5.3 | Very steady. | | 9.0° | 6.2 7.1 | | Quite steady. | | 9.32° | 7.2 8.6 | 7.5 | Ditto. | | 9.39° | 8. 9. | 7.5 | Ditto. | | Date | Event Description | Lat. | Long. | |------------|--------------------------------------------|------|-------| | Nov. 16 | In sight of Coast of Arabia. | 12.54| 47° | | 17 | Cape Aden in sight. | 12.41| 45° | | 18 | At anchor at Mocha. | 12.38| 44° | | 20 | Ditto. | 13.22| 44° | | 21 | Aboard at the Company's factory. | 13.20| 44° | | 22 | In sight of Gebel Zeker. | 14.24| 43° | | 23 | In sight of Gebel Tar. | 15.29| 43° | | 24 | Ditto. | 16.2 | 42° | | 25 | | 16.24| 42° | | 26 | | 17.5 | 41° | | 27 | | 18.14| 41° | | 28 | | 19.36| 40° | | 29 | Off Judda. | 20.59| 39° | | Dec. 1 | In sight of Coast of Abyssinia. | 21.56| 37° | | 2 | | 22.44| 38° | | 3 | | 22.46| 38° | | 4 | | 22.54| 37° | | 6 | At anchor on Coast of Arabia. | 24.16| 38° | | 7 | Off Coast of Arabia. | 24.17| 38° | | Lat. | Long. | Variation | North Dip | |------|-------|-----------|-----------| | | | Az. | Amp. | Face | MD. | C.D. | | | | | | E. | W. | | | 12.54| 47.4 | 9.31*| 9.39*| 6.2 | 7.2 | 6.6 | 5.7 | Pretty steady. | | 12.41| 45.25 | *10.38| *10.35| 6.2 | 7.2 | 6.6 | 5.7 | Ditto. | | 12.38| [44.5] | *11.25| *11.30| 7.2 | 8.2 | 7.6 | 6.7 | Ditto. | | 13.22| 44.10 | 11.35*| 11.22*| 8.6 | 9.6 | 9.2 | 8.3 | Ditto. | | 13.22| 44.10 | 11.2* | 8.4 | 9.4 | 9. | 8.1 | Not steady, much wind. | | 13.20| 44.11 | 9.2 | 9.6 | 9.4 | 8.5 | | | | 14.24| 43.35 | 11.11*| 12.4 | 12.4 | 11.5| Pretty steady. | | 15.29| 43.12 | 13.10*| 13.14 | 14.2 | 14.2| 13.3| Very steady. | | 16.2 | 42.49 | 14.3* | 13.53*| 15.6 | 15.6| 14.7| Ditto. | | 16.24 | 42.22 | 14.2* | 13.31 | 16.6 | 16.6| 15.7| Ditto. | | 17.5 | 41.54 | 13.44*| 13.50*| 19.1 | 19.1| 18.2| Ditto. | | 18.14 | 41.0 | 13.54*| 13.58*| 20.6 | 21. | 20. | Pretty steady. | | 19.36 | 40.30 | 13.12*| 13.19*| 24.2 | 24.6| 23.5| Ditto. | | 20.59 | 39.56 | 12.52*| 12.59*| 26.7 | 26.7| 26. | Ditto. | | 21.43 | 39.3 | 12.49*| 29.6 | 29.6 | 29.6| 28.7| Very unsteady, much wind and pitching. | | 21.53 | 37.57 | | about 32. | | | | Very unsteady. | | 22.44 | 38.24 | 32.6 | 32.6 | 32.6 | 32. | | Not very steady. | | 22.46 | 38.11 | 32. | 32. | 32. | 31.2| Pretty steady. | | 22.54 | 37.44 | 32.4 | 32.4 | 32.4 | 31.6| Not very steady. | | 24.16 | 38.29 | 34.6 | 34.6 | 34.6 | 34. | Pretty steady. | | 24.17 | 38.21 | 14.52*| 15.0*| | | | | * Dd 10 ### Register of the Dip in His Majesty's Sloop #### Magnetical | Date | Lat. | Long. | Variation | South Dip | Face | MD. | C.D. | |------|------|-------|-----------|-----------|------|-----|------| | Dec. 8 | Ashore on a small island on coast of Arabia. | 24°17' | 38°30' | E | E | 35° | 35° | 35° | 34°2 | Much wind. | | | At anchor at Barady. | 24°16' | 38°30' | 14°1°* | 35° | 35° | 35° | 35° | 34°2 | Pretty steady. | | | | | 13°50°* | 35° | 35° | 35° | 35° | 34°3 | Very steady. | | | | | 13°50°* | 35° | 35° | 35° | 35° | 34°2 | Not very steady; deal of wind. | | | | | 35°2 | 35°2 | 35°2 | 34°4 | Very steady. | | | | | 35° | 35° | 35° | 34°2 | Not steady, swell. | | | | | 35° | 36° | 35°4 | 34°6 | Much motion, wind. | | | | | 11°48°* | 11°41° | 36°2 | 36°2 | 35°4 | Pretty steady. | | | | | 11°30°* | 11°40° | 38° | 38° | 37°2 | Not very steady. | | | | | 38°4 | 38°4 | 38°4 | 37°6 | Pretty steady. | | | | | 12°15°* | 12°5° | 38°6 | 39° | 38°7 | Extremely steady. | | | | | 12°10°* | 39°7 | 40°7 | 40°3 | 39°5 | Very steady. | | | In sight of Ras Mahomet. | 26°55' | 35°38' | 12°58°* | 12°46° | abt | 42° | Very unsteady, n. | | | At anchor off Tor. | 28°16' | | | | | | Ditto, a little swell. | #### Astronomical | Date | Long. from Greenwich | D. & T.K. | O.S. | E. D. | |------|----------------------|-----------|------|-------| | Nov. 1 | W | .22 | 73°31'30" | 6°33' | Kalpeny bearing N. | | Nov. 19 | E | 44°8'18" | 5°14' | A | | Nov. 20 | E | 44°16' | 5°8'2 | | | Nov. 21 | E | 44°6' | *A | 3°15' | | Nov. 24 | E | 42°28' | *A | 5°13' | | Nov. 29 | E | 38°47' | *A | 5°33' | | Dec. 2 | E | 37°49' | 7°20' | | | Dec. 3 | E | 37°34' | 5°15' | | ### Magnetic Observations | Variation | South Dip | Face | MD.C.D. | |-----------|-----------|------|---------| | Az. | Amp. | E. | W. | | 14° 1* | 35° | 35° | 35° | | 13° 50* | 35° | 35° | 35° | | 13° 50* | 35° | 35° | 35° | | 35° | 35° | 35° | 35° | | 35° | 35° | 35° | 35° | | 35° | 36° | 35° | 35° | | 36° | 36° | 36° | 36° | | 38° | 38° | 38° | 38° | | 38° | 38° | 38° | 38° | | 38° | 38° | 38° | 38° | | 39° | 39° | 39° | 39° | | 39° | 39° | 39° | 39° | | 40° | 40° | 40° | 40° | | 42° | 42° | 42° | 42° | | 42° | 42° | 42° | 42° | | 42° | 42° | 42° | 42° | - Much wind. - Pretty steady. - Very steady. - Not very steady, good deal of wind. - Very steady. - Not steady, swell from Sd. - Much motion, with wind. - Pretty steady. - Not very steady. - Pretty steady. - Extremely steady. - Very steady. - Very unsteady, much wind. - Pretty steady. - Ditto, a little swell. ### Astronomical Observations in The Swallow | Long. from Greenwich | D. D. T.K. | O.S. | E. D. | |---------------------|------------|------|-------| | Nov. 19 | 44. 8.18 | O | 5 14 | | Nov. 20 | 44.16 | O | 5 8 | | Nov. 21 | 44. 6 | *A | 3 15 | | Nov. 24 | 42.28 | *A | 5 13 | | Nov. 29 | 1. 9 | *A | 5 33 | | Dec. 2 | .35 | O | 7 20 | | Dec. 3 | .38 | O | 5 15 | - At anchor in Mocha Road. - Observed an immersion of 1st fat. of Jupiter with my glass, a good deal of wind and ship not very still. - Per watch — 11. 0.30 - Watch slower than apparent time 1.52.19 - Eclipse per naut. alm. — 12.52.49 - 9.56.48 - 2.56. 1 = 44.0.15 | Lat. | Long. | Variation | South Dip | Face | MD. | C.D. | |------|-------|-----------|-----------|------|-----|------| | | | Az. | Amp. | E. | W. | | | At anchor at 5 fath. on Coast of Africa | 29.12 | °E | 'E° | 43.6 | 44. | 43.7 | 43.2 | Fresh wind and good deal of motion. | | | 29.35 | 12.50° | 46. | 46. | 46. | 45.3 | Ditto. | | Off Suez. | 29.51 | 32.12 | 45.2 | 45.6 | 45.4 | 44.7 | Perfectly steady. | | At anchor off Suez. | N. Lat. obs. | 29.58 | 32.15 | 45.6 | 45.6 | 45.6 | 45.1 | | Ditto. | 29.58 | 29.58 | 45.2 | 45.2 | 45.2 | 44.5 | Very steady. | | Ditto. | Changed the poles, unmarked end dips, | 43.6 | 43.3 | 43.4 | 44. | | Rechanged the poles, marked end dips, | 44.4 | 44.4 | 44.4 | 44. | | At anchor off Suez. | 29.58 | 29.58 | 44.5 | 44.5 | 44.5 | 44. | Perfectly steady. | | Ditto. | 29.58 | 45.5 | 45.7 | 45.6 | 45.1 | Ditto. | | Suez | 29.58 | 30.2 | 32.16 | The Swallow. Long. from Greenwich. | Dec. 6 | 1777 | Jan. 4 | 5 | 6 | |--------|------|-------|---|---| | °E | 37°50' | 32°12' | 32°11' | 32°42' | 31°47' | 32°21' | | T.K. | O.S. | E. | D. | O.S. | E. | D. | | 29 | 3 | 3 | 3 | 10 | 10 | 8 | 14 | 24 | | Off Suez. | At anchor in Suez Road. | Observation of 1st sat. of Jupiter with my telescope, wind and ship not very still, - 11.030 - Mean apparent time 1.52.19 Alt. 12.52.49 Declination 9.56.48 2.56.1 = 44.0.15