Astronomical Observations Made by Order of the Royal Society, at Prince of Wales's Fort, on the North-West Coast of Hudson's Bay. By William Wales and Joseph Dymond

LXV. Astronomical Observations made by Order of the Royal Society, at Prince of Wales's Fort, on the North-West Coast of Hudson's Bay. By William Wales and Joseph Dymond. Mem. The Thermometer marked A was hung within the southern, or lower Observatory; in such a Part as we judged would be least affected by the Fire; close to, and with its Ball exactly of the same Height with, the Quicksilver in the Basin of the Barometer: That marked B was hung without Doors, on the north Side of the Observatory. The Floor of the Observatory might be above 50 Feet above the Level of the Sea at Low-water Mark. | 1768 | Equal altitudes. Times by the clock. | Zenith Barometer. | Thermometers. | Phænomena and Circumstances. | |------|-------------------------------------|------------------|--------------|-------------------------------| | | Lowest Wire | Middle Wire | Upper Wire | Passed the Meridian. | Inches | A. | B. | Observer | | Septemb. | " h " | " h " | " h " | " h " | | | | | | 2 | 14 17 15 19 20 54 24 33 | 23 49 18 1/2 | 75 40 | 25,56 | 38 1/2 | 38 | W. | O's U. L. | | | 21 37 | 25 16 28 55 | | | | | | O's L. L. | | | 15 59 | 4 12 18 8 37 | | | | | | O's L. L. | | | 20 24 | 16 44 13 5 | | | | | | O's U. L. | | 3 | At noon wound up the clock. | | | | | | | D. | | | 19 14 5+19 18 36 22 10 23 54 7 | | | | | | | O's U. L. | | | 19 15 | 22 56 26 37 | | | | | | O's L. L. | | | 33 8 | 36 55 40 39 | | | | | | O's U. L. | | | 37 37 | 4 25 45 | | | | | | O's L. L. | | 4 | 20 9 36 | 4 10 19 6 32 | | | | | | O's U. L. | | | 14 3 | 24 16 20 37 | | | | | | O's L. L. | | | 32 19 | 25 | | | | | | O's U. L. | | | 36 56 | 19 40 44 | | | | | | O's L. L. | | | 41 26 | | | | | | | O's U. L. | | 5 | 4 33 | 12 | | | | | | O's L. L. | | | 15 47 19 19 30 23 11 | | | | | | | O's U. L. | | | 20 13 19 | 27 27 | | | | | | O's L. L. | | | 40 42 19 44 34 48 22 | | | | | | | O's U. L. | | | 45 16 | 49 7 52 54 | | | | | | O's L. L. | | | 0 47 20 | 4 44 8 41 | | | | | | O's U. L. | | | 5 27 | 9 28 13 25 | | | | | | O's L. L. | | 6 | 45 26 | 3 37 27 | | | | | | O's U. L. | | | 50 8 | 46 9 42 9 | | | | | | O's L. L. | | | 5 38 | 4 1 42 58 3 | | | | | | O's U. L. | | | 10 2 | 6 18 2 32 | | | | | | O's L. L. | | | 30 36 | 26 52 23 5 | | | | | | O's U. L. | | | 34 57 | 31 18 26 37 | | | | | | O's U. L. | O o o 2 1768 From the preceding observations, I have found that the clock is gaining $1' 18''$ per day on mean solar time, and in consequence of that is now about $10' 9''$ too fast; therefore at $20^h$ we stopped it, altered the pendulum to make it go slower, and set it to nearly mean time, W. W. | Equal altitudes. | Times by the clock. | Zenith distance | Barometer. | Thermometers. | Phænomena and Circumstances. | |------------------|---------------------|-----------------|------------|---------------|-------------------------------| | Lower Wire. | Middle Wire. | Upper Wire. | Passed the Meridian. | Inches. | A | B | Observer. | | September | | | | | | | 28 38 24 | 20 42 54 | 47 22 | 23 52 16½ | 71 40 | 29,96 | 43½ | W. | | | 43 46 | 48 20 | 42 55 | | 29,98 | 56 | W. | | 29 59 50 | 2 55 9 | 50 43 | 71 40 | | 29,98 | 56 | W. | | | 5 14 | 3 0 43 | 55 17 | | 29,82 | 36 | W. | | 3c 47 22 | 19 51 18 | 55 15 | 23 53 13½ | 78 0 | 29,82 | 36 | W. | | | 52 7 | 56 4 | 0 1 | | 76 0 | | W. | | | 8 6 | 20 12 18 | | | | | W. | | | 13 6 | 17 17 | 21 27 | | | | W. | | Oct. 1 | | | | | | | W. | | 3 | 40 24 | 23 53 46½ | 76 0 | | 29,72 | 49½ | W. | | | 3 49 21 | 45 25 | 78 0 | | 29,34 | 41 | D. | | | 4 54 9 | 50 14 | 79 0 | | 29,33 | 41½ | D. | | | 9 19 46 | 50 0 | 77 0 | | 29,18 | 50 | D. | | | 52 50 | 54 44 | 79 0 | | 29,18 | 50 | D. | | | 59 46 | 3 50 | 75 2 | | 29,18 | 50 | D. | | | 4 36 | 8 43 | 12 45 | | | | D. | | | At noon wound up the clock. | | | | | | | | | 41 57 | 3 37 52 | 33 49 | | 29,18 | 50 | D. | | | 6 48 | 42 44 | 38 43 | | 29,18 | 50 | D. | | | 55 42 | 51 47 | 79 0 | | 29,18 | 50 | D. | | | 4 20 | 4 0 26 | 56 33 | | | | D. | | | At noon wound up the clock. | | | | | | | | | 15 32 35 | 20 37 5 | 16 55 | | 29,86 | 28 | W. | | | 17 54 | 20 57 38 | 76 20 | | 29,87 | 29 | W. | | | 52 49 | 21 3 26 | 76 20 | | 29,87 | 29 | W. | | | 8 2 | 3 3 15 | 78 20 | | 29,90 | 41 | W. | | | 22 54 | 18 21 | 13 54 | | 29,90 | 41 | W. | | | 28 14 | 23 47 | 19 21 | | | | W. | | | At noon wound up the clock. | | | | | | | | | 37 54 | 20 42 28 | 46 59 | | 30,19 | 21 | D. | | | 13 24 | 47 57 | 52 30 | | 30,19 | 21 | D. | | | 17 3 | 3 16 58 | 12 20 | | 30,20 | 31 | D. | | | 27 2 | 17 57 | 79 0 | | 30,20 | 31 | D. | | | At noon wound up the clock. | | | | | | | | | 25 | 24' 11'' | and screwed down the ball of the pendulum $\frac{1}{2}$ of a turn, W. W. | | | | | | | 39 31 | 20 44 28 | 49 30 | | 29,78 | 15 | W. | | | 15 28 | 50 24 | 55 44 | | 29,78 | 15 | W. | | | 2 23 | 7 53 | 13 32 | | 29,77 | 15 | W. | | | 9 0 | 14 43 | 20 28 | | | | W. | W. = W. W. | Year | Equal altitudes. Times by the clock. | Zenith distance | Barometer. | Thermometers. | Phænomena and Circumstances. | |------|-------------------------------------|----------------|------------|---------------|-------------------------------| | | Lower Wire | Middle Wire | Upper Wire | Passed the Meridian | Inches | A | B | Observer. | | Oct. | " | " | " | " | " | " | " | " | | 26 | 19 48 | 2 14 6 | 78 | 29,64 | 19 | 15 | W. | O's L. L. | | 26 | 22: | 20 53 | 15 20:: | 29,63 | 18½ | 14½ | W. | O's U. L. very | | 43 | 15 | 2 38 | 9 33 0: | 29,63 | 3 | 4½ | W. | O's L. L. hazy | | 49 | 12 | 44 14 | 39 12 | 29,63 | 3 | 4½ | W. | O's U. L. | | Nov. | 6 | 57 45 | 8 1 15 | 4 42 | 13 | 19 27¼ | 71 | Aldebaran easterly | | 8 | 2 | 11 32 | 14 59 | 69 40 | 29,56 | -3 | -11 | W. | | 18 | 27 21 | 30 51 | 69 40 | 29,56 | -3 | -11 | W. | Aldebaran westerly | | 34 | 14 | 37 42 | 41 10 | 71 | 29,60 | +9 | -3 | D. | | 37 | 55 | 8 41 35 | 45 12 | 61 20 | 29,60 | +9 | -3 | D. | | 56 | 56 | 9 0 40 | 4 21 | 59 | 29,60 | +1 | -8 | D. | | 31 | 10 | 16 27 28 | 23 45 | 59 | 29,60 | +1 | -8 | D. | | 50 | 14 | 46 32 | 61 20 | 29,60 | +1 | -8 | D. | Aldebaran westerly | | 17 | 24 1 | 7 27 27 | 30 56 | 70 20 | 29,73 | -1 | -9 | D. | | 36 | 53 | 40 23: | 43 52 | 68 40 | 29,73 | -1 | -9 | D. | | 53 | 15 | 56 46 | 67 | 29,73 | -1 | -9 | D. | Aldebaran easterly | | 31 | 21 | 17 27 50 | 24 24 | 67 | 29,73 | -1 | -9 | D. | | 44 | 15: | 17 40 44 | 37 17 | 68 40 | 29,73 | -1 | -9 | D. | | 57 | 7 | 53 40: | 50 13 | 70 20 | 29,73 | -1 | -9 | D. | | 18 | 1 52: | 8 5 27 | 8 56 | 65 | 29,88 | -14 | D. | Aldebaran easterly, hazy | | 12 | 11 | 7 8 38 | 5 6 | 65 | 29,88 | -14 | D. | Aldebaran westerly | | 19 | 2 | 9 6 17 | 10 43 | 57 | 29,88 | -14 | D. | Aldebaran easterly | | 17 | 31 | 21 30 | 25 27 | 55 20 | 29,88 | -14 | D. | Ditto Ditto | At noon I went to wind up the clock, but found it had stopped at 6h 48m. I suppose it had been stopped by the cold last night, and therefore I kindled a fire to warm it before it was let a going. At about 6h 58m by the alarm set the regulator a going and wound it up. J. D. At 21h I found that the regulator had stopped at 20h 16' 3", notwithstanding the fire was very good and by agreement with Mr. Wales, I let the fire go out, the stove being obliged to stand so near the side of the observatory that a little extraordinary fire would endanger the same, it having twice melted the lead at the back already; I also took off the weight off the regulator to ease it, and let it stand. J. D. | March | Lower Wire | Middle Wire | Upper Wire | Passed the Meridian | Zenith distance | Barometer | Thermometers | Observer | Phænomena and Circumstances | |-------|------------|-------------|------------|---------------------|----------------|-----------|--------------|---------|-----------------------------| | 1769 | | | | | | | | | | | | 39 1 | 7 43 50 | 8 39 10 | 7 37 3 | 53 0 | 29.76 | -22 -30 W. Regulus easterly | | | 3 33 | 7 58 44 | 3 58 | | 51 40 | | | | Regulus westerly | | | 44 | 12 31 25 | 26 37 | | 53 0 | 29.68 | -28 -34 W. | | | | | 6 13 | | | | | | | | | | | 4 B. These were made by the assistant Clock. | | | | | | | | | | | 21 | Set Mr. Ellicot's clock a going. | | | | | | | | | | 29 32 48 | 9 36 25 | 39 59 | 13 36 26 4 | 57 20 | 29.81 | +2 0 W. Arcturus easterly | | | 3 29 | 47 7 | 50 44 | | 55 0 | | | | Arcturus westerly | | | 29 22 | 17 25 43 1 | 22 7 | | 56 0 | | | | | | | 0 6 | 30 29 | 32 55 | | 57 20 | 29.80 | -10 -17 W. | | | | | 3c | 5 3 | 8 52 | 12 40 | 70 40 | 29.79 | +1 +8 W. | | | | | 9 37 | 13 28 | 17 16 | | 70 40 | 29.83 | +14 +15 W. | | | | | 6 50 | 4 2 59 | 59 11 | | 70 40 | 29.83 | +14 +15 W. | | | | | 11 25 | 7 35 | 3 40 | | 72 20 | 29.85 | -8 -5 D. | | | | | April 2 | 19 47 4 | 50 42 | | 72 20 | 30.00 | +5 +12 D. | | | | | 47 45 | 51 25 55 | 55 5 | | 72 20 | 30.00 | +5 +12 D. | | | | | 3 29 38 | 4 25 57 | 22 17 | | 72 20 | 30.00 | +5 +12 D. | | | | | 4 0 | 30 20 | 26 40 | | 72 20 | 30.12 | -6 -3 D. | | | | | 40 56 | 19 44 6 | 48 17 | | 72 0 | 30.12 | +12 +20 D. | | | | | 45 17 | 48 58 5 | 52 37 | | 72 0 | 30.12 | +12 +20 D. | | | | | 5 32 29 | 4 28 45 | 45 8 | | 72 0 | 30.08 | -1 +8 D. | | | | | 33 28 | 19 42 7 | 45 44 | | 72 0 | 30.08 | -1 +8 D. | | | | | 42 50 | 50 6 | | | 72 0 | 30.14 | +14 +11 D. | | | | | 6 15 16 | 4 31 36 | 28 0 | | 72 0 | 30.14 | +14 +11 D. | | | | | 39 36 | 35 57 | 32 21 | | 73 20 | 30.00 | +6 +12 W. | | | | | 8 20 28 | 19 24 2 | 27 35 | | 73 20 | 30.00 | +6 +12 W. | | | | | 24 43 | 28 17 | 31 49 | | 73 20 | 29.99 | +22 +27 W. | | | | | 5 53 58 | 4 50 23 | 46 51 | | 73 20 | 29.99 | +22 +27 W. | | | | | 58 13 | 54 39 | 51 7 2 | | 73 20 | 29.99 | +22 +27 W. | | | | | 16 26 16 | 19 29 51 | 33 24 | | 72 0 | 30.20 | -7 -6 W. | | | | | 30 32 | 34 8 | 37 4 1 | | 72 0 | 30.20 | -7 -6 W. | | | | | 11 48 41 | 4 45 5 | 41 31 | | 72 0 | 30.20 | -7 -6 W. | | | | | 52 56 2 | 49 22 | 45 49 | | 72 0 | 30.20 | -7 -6 W. | | | | | 12 13 47 | 19 17 21 | 20 3 | | 73 0 | 29.73 | +5 +12 W. | | | | | 18 3 | 21 35 | 25 5 | | 73 0 | 29.73 | +5 +12 W. | | | | | 13 1 44 | 4 58 10 | 54 41 | | 73 0 | 29.63 | +23 +17 W. | | | | | 5 57 | 5 2 24 | 18 55 | | 73 0 | 29.63 | +23 +17 W. | | | | | 15 | | | | | | | | | | | I find from a mean of 8 comparisons made in the course of this week, and that which immediately preceded the last, that the assistant clock gains on Mr. Ellicot's at the rate of 3', 03 3/4", 3", 2" i in 6 hours; but from a mean of 4 taken the week preceding the last, it gained only 2" 8 1/2; and from the 4 which were made this week, it gains 3" 25 in six hours. W. W. | | | 15 | 20 33 23 | 37 16 | | 62 48 | 29.91 | +1 +6 D. | | | | | 14 7 | 38 3 | 41 57 | | 62 48 | 29.91 | +1 +6 D. | | | | | 16 20 | 3 42 25 | 38 32 | | 62 48 | 29.87 | +13 +12 D. | | | | | 47 5 | 43 12 | | | 62 48 | 29.87 | +13 +12 D. | | | 1769 | Year | Equal altitudes. Times by the clock. | Zenith distance | Barometer | Thermometers | Phænomena and circumstances. | |------|-----------------------------------|----------------|-----------|--------------|----------------------------| | 1769 | Lower Wire Middle Wire Upper Wire Passed the Meridian | Inches | A | B | Observer | | April | 22 14 6 20 17 48 21 32 | 62 40 | 29,45 | +22 | +32 | W. | | | 18 33 22 17 26 2 | 62 40 | 29,45 | 36 | 41 | W. | | | 23 3 48 4 0 1 | 62 40 | 29,45 | 36 | 41 | W. | | | 8 14 4 4 31 | 71 20 | 29,60 | 26 | 28 | W. | | | 3 12 19 6 41 | 69 20 | 29,60 | 26 | 28 | W. | | | 7 21 10 53 14 22 | 69 20 | 29,60 | 26 | 28 | W. | | | 22 59 26 29 29 58 | 69 20 | 29,60 | 26 | 28 | W. | | | 24 59 35 4 56 3 | 69 20 | 29,60 | 26 | 28 | W. | | | 3 49 5 0 17 | 69 20 | 29,60 | 26 | 28 | W. | | | 15 14 11 43 8 13 | 69 20 | 29,60 | 26 | 28 | W. | | | 19 26 15 56 12 29 | 69 20 | 29,60 | 26 | 28 | W. | | | 1 0 21 9 15 | 69 20 | 29,60 | 26 | 28 | W. | | | 5 54 21 10 6 14 15 | 69 20 | 29,60 | 26 | 28 | W. | | | 16 48 3 12 37 8 30 | 69 20 | 29,60 | 26 | 28 | W. | | | 21 45 17 36 13 30 | 69 20 | 29,60 | 26 | 28 | W. | | | 25 12 19 28 43 32 13 | 69 20 | 29,60 | 26 | 28 | W. | | | 29 26 32 57 36 27 | 69 20 | 29,60 | 26 | 28 | W. | | | 3 26 53 39 4 50 8 | 69 20 | 29,60 | 26 | 28 | W. | | | 57 52 54 23 50 50 | 69 20 | 29,60 | 26 | 28 | W. | | | 33 46 21 38 21 42 54 | 69 20 | 29,60 | 26 | 28 | W. | | | 39 17 43 54 48 28 | 69 20 | 29,60 | 26 | 28 | W. | | | 24 27 43 50 2 39 11 34 36 | 69 20 | 29,60 | 26 | 28 | W. | | | 49 22 44 47 40 12 | 69 20 | 29,60 | 26 | 28 | W. | | | 21 10 19 24 41 28 10 | 69 20 | 29,60 | 26 | 28 | W. | | | 25 23 28 55 32 25 | 69 20 | 29,60 | 26 | 28 | W. | | | 28 58 5 4 54 32 51 3 | 69 20 | 29,60 | 26 | 28 | W. | | | 2 17 58 45 55 15 | 69 20 | 29,60 | 26 | 28 | W. | | | 2 May 3 5 26 20 9 5 12 42 | 69 20 | 29,60 | 26 | 28 | W. | | | 9 43 13 20 16 57 | 69 20 | 29,60 | 26 | 28 | W. | | | 4 15 43 19 59 4 16 21 12 43 | 69 20 | 29,60 | 26 | 28 | W. | | | 3 34 20 7 10 10 47 | 69 20 | 29,60 | 26 | 28 | W. | | | 7 48 11 26 15 2 | 69 20 | 29,60 | 26 | 28 | W. | | | 5 17 37 4 13 58 10 22 | 69 20 | 29,60 | 26 | 28 | W. | | | 21 52 18 14 14 39 | 69 20 | 29,60 | 26 | 28 | W. | | | 24 11 39 32 19 43 6 46 37 | 69 20 | 29,60 | 26 | 28 | W. | | | 43 47 47 20 50 51 | 69 20 | 29,60 | 26 | 28 | W. | | | 9 12 44 55 4 41 22 37 53 | 69 20 | 29,60 | 26 | 28 | W. | | | 49 10 45 37 42 6 | 69 20 | 29,60 | 26 | 28 | W. | | | 59 56 5 7 36 15 46 | 69 20 | 29,60 | 26 | 28 | W. | | | 17 43 27 5 37 45 | 69 20 | 29,60 | 26 | 28 | W. | | | 53 49 7 44 29 | 69 20 | 29,60 | 26 | 28 | W. | | | 11 29 8 3 55 55 48 | 69 20 | 29,60 | 26 | 28 | W. | | | 47 13 8 52 7 57 6 | 69 20 | 29,60 | 26 | 28 | W. | | | 2 9 9 7 31 12 59 | 69 20 | 29,60 | 26 | 28 | W. | | | 54 52 12 49 31 44 1:10 58 29,3 | 69 20 | 29,60 | 26 | 28 | W. | | | 9 44 11 3 4 49 159 50 | 69 20 | 29,60 | 26 | 28 | W. | 1769 | Year | Equal altitudes. Times by the clock. | Zenith distance | Barometer | Thermometers | Phænomena and Circumstances | |------|-------------------------------------|-----------------|-----------|--------------|----------------------------| | 1769 | Lower Wire | Middle Wire | Upper Wire | Passed the Meridian | Inches | A | B | Observer | | May | 2:49 48 | 3:05 36 | 5:57 24 | 52 20 | 29.66 | 32 | 45 | W. | | | 3:41 21 | 5:58 10 | 1:59 | 52 20 | 29.75 | 40 | 46 | W. | | | 3:37 29 | 3:33 40 | 0:17 38:3 | 52 20 | 29.75 | 40 | 46 | W. | | | 5:50 | 4:23 | 3:38 16 | 52 20 | 29.75 | 40 | 46 | W. | | | At 20h put the clock back. | | | | | | | | | | 1:02 25 | 2:01 14 | 5:17 43 | 54 20 | 29.82 | 27 | 39 | W. | | | 1:48 48 | 1:18 29 | 12:11 | 54 20 | 29.89 | 44 | 48 | W. | | | 3:33 56 | 0:15 | | 54 20 | 29.89 | 44 | 48 | W. | | | 3:38 18 | 3:43 39 | | 53 40 | 29.81 | 34 | 46 | W. | | | 1:59 | | | 53 40 | 29.70 | 47 | 59 | W. | | | 2:14 7 | 2:17 48 | 2:13 | 53 40 | 29.70 | 47 | 59 | W. | | | 3:31 | 2:22 | | 53 40 | 29.70 | 47 | 59 | W. | | | 3:31 35 | | | 53 40 | 29.70 | 47 | 59 | W. | | | 9:42 | | | 53 40 | 29.70 | 47 | 59 | W. | | | 1:33 39 | 9:23 | 5:30:23 | 57 50:3 | 63 | 0 | | D. | | | 2:39 | 6:12 | 9:3:2 | | 61 | 0 | | D. | | | 1:17 31 | 10:58 | | | 61 | 0 | | D. | | | 8:81 | 2:13 | | | 61 | 0 | | D. | | | 2:57 7 | 4:34 2:2 | | | 61 | 0 | | D. | | | 3:38 35 | 3:35 | | | 61 | 0 | | D. | | | 4:50 | 4:06 | | | 61 | 0 | | D. | | | 5:59 | 5:02 | | | 61 | 0 | | D. | | | 7:56 | 1:25 | 4:52 | | 61 | 0 | | D. | | | 5:31 | 5:31 | 8:59 | | 61 | 0 | | D. | | | 3:25 | 16:54 | 20:23 | | 61 | 0 | | D. | | | 7:32 | 21:3 | 24:31 | | 61 | 0 | | D. | | | 9:16 | 4:35 | 4:44 | | 61 | 0 | | D. | | | 4:21 | 39:51 | 36:25 | | 61 | 0 | | D. | | | 5:44 | 5:13 | 4:49 | | 61 | 0 | | D. | | | 5:51 | 5:51 | 5:49 | | 61 | 0 | | D. | | | 6:5 | 18:59 | 3:44:23 | | 61 | 0 | | D. | | | 11:11 | 19:3 | 3:39:27 | | 61 | 0 | | D. | | | 11:32 | 15:2 | 18:31 | | 61 | 0 | | D. | | | 15:40 | 19:10 | 22:37:2 | | 61 | 0 | | D. | | | 27:4 | 30:34 | 4:4 | | 59 | 0 | | D. | | | 11:12 | 34:43 | 3:12:2 | | 59 | 0 | | D. | | | 12:40 | 46:13 | 4:44 | | 57 | 0 | | D. | | | 46:51 | 50:25 | 5:56 | | 57 | 0 | | D. | | | 2:58 | 4:9 | 2:5 | | 57 | 0 | | D. | | | 13:38 | 10:8 | | | 57 | 0 | | D. | | | 28:41 | 25:10 | 21:38 | | 59 | 0 | | D. | | | 32:47 | 29:17 | 25:47:2 | | 59 | 0 | | D. | | | 14:11 | 40:41 | 37:14 | | 61 | 0 | | D. | | | 18:20 | 44:50 | 1:22 | | 63 | 0 | | D. | | | 59:39 | 56:11 | 52:38:2 | | 63 | 0 | | D. | | | 3:49 | 5:0 | 18:59 | | 63 | 0 | | D. | | | 59:51 | 9:3 | 20:5 | | 63 | 0 | | D. | 1769 | Year | Month | Lower Wire | Middle Wire | Upper Wire | Passed the Meridian | Zenith distance | Barometer Inches | Thermometers A | Thermometers B | Observer | Phænomena and Circumstances | |------|-------|------------|-------------|------------|-------------------|----------------|-----------------|---------------|---------------|----------|--------------------------------| | 1769 | June | 3 11 9 | 14 36 | 18 2 | | | | | | W. | ○'s U. L. | | | | 15 18 | 18 45 | 22 12 | | | | | | ○'s L. L. | easterly | | | | 26 37 | 19 30 | 7 | | | | | | ○'s U. L. | very | | | | 30 47 | 33 35 | | | | | | | ○'s L. L. | hazy | | | | 42 14 | 37 48 | | | | | | | ○'s U. L. | | | | | 46 29 | 45 47 | 49 18 | | | | | | ○'s L. L. | | | | | 50 2 | 53 32 | | | | | | | ○'s U. L. | | | | | 4 10 34 | 7 | 11 | | | | | | ○'s L. L. | westerly | | | | 4 26 14 | 22 45 | | | | | | | ○'s U. L. | very uncertain | | | | 33 56 | 30 28 | | | | | | | ○'s U. L. | because of cloud | | | | 45 17 | 41 49 | | | | | | | ○'s L. L. | | | | | 49 27 | 45 56 | 42 33 | | | | | | ○'s U. L. | | | | | 18 36 | 19 22 | 6 | | | | | | ○'s L. L. | | | | | 22 46 | 29 47 | | | | | | | ○'s U. L. | | | | | 34 8 | 37 36 | 41 7 | | | | | | ○'s L. L. | easterly | | | | 38 18 | 41 49 | 45 26 | | | | | | ○'s U. L. | | | | | 49 49 | 53 22 | 56 51 | | | | | | ○'s L. L. | | | | | 54 5 | 59 38 | 1 | | | | | | ○'s U. L. | | | | | 5 7 21 | 4 | 8 | | | | | | ○'s L. L. | westerly | | | | 23 5 | 16 2 | | | | | | | ○'s U. L. | very cloudy | | | | 27 18 | 23 45 | 30 17 | | | | | | ○'s L. L. | and uncertain | | | | 38 39 | 35 8 | 31 40 | | | | | | ○'s U. L. | | | | | 42 51 | 39 19 | | | | | | | ○'s L. L. | easterly | | | | 10 15 | 19 13 | 44 | | | | | | ○'s U. L. | | | | | 14 23 | 17 51 | 21 17 | | | | | | ○'s L. L. | | | | | 41 16 | 44 45 | 48 17 | | | | | | ○'s U. L. | | | | | 45 26 | 48 59 | 52 30 | | | | | | ○'s L. L. | westerly | | | | 11 21 | 4 17 | 38 | | | | | | ○'s U. L. | | | | | 25 22 | 21 49 | 18 19 | | | | | | ○'s L. L. | easterly | | | | 52 16 | 48 47 | 45 20 | | | | | | ○'s U. L. | | | | | 56 29 | 52 54 | | | | | | | ○'s L. L. | westerly | | | | 19 25 | 19 28 | 44 | | | | | | ○'s U. L. | | | | | 29 24 | 32 55 | 36 23 | | | | | | ○'s L. L. | easterly | | | | 40 47 | 44 18 | 47 47 | | | | | | ○'s U. L. | | | | | 44 59 | 48 30 | 50 02 | | | | | | ○'s L. L. | | | | | 29 56 | 4 26 | 22 54 | | | | | | ○'s U. L. | | | | | 34 7 | 30 36 | 27 7 | | | | | | ○'s L. L. | weasterly | | | | 45 27 | 41 57 | 38 28 | | | | | | ○'s U. L. | | | | | 49 37 | 46 7 | 42 38 | | | | | | ○'s L. L. | easterly | | | | 21 26 | 8 19 | 29 38 | 33 6 | | | | | ○'s U. L. | | | | | 30 70 | 33 50 | 37 19 | | | | | | ○'s L. L. | | | | | 41 43 | 45 14 | 48 43 | | | | | | ○'s U. L. | | | | | 45 55 | 49 26 | 52 55 | | | | | | ○'s L. L. | easterly | | | | 22 30 | 4 27 | 14 | | | | | | ○'s U. L. | | | | | 34 56 | 31 26 | 27 55 | | | | | | ○'s L. L. | weasterly | | | | 46 18 | 42 48 | 39 18 | | | | | | ○'s U. L. | | | | | 50 27 | 46 58 | 43 30 | | | | | | ○'s U. L. | | Vol. LIX. | Year | Equal altitudes. | Zenith distance | Barometers | Thermometers | Phænomena and Circumstances | |------|-----------------|----------------|------------|--------------|-----------------------------| | 1769 | Times by the clock. | Lower Wire | Middle Wire | Upper Wire | Passed the Meridian | Inches | A | B | Observer | | June | | h | " | h | " | o | " | | | | 24 | 22 | 11 18 | 19 14 47 | 22 2+1 | 61 20 | 29,68 | 46 | 49 | W. | | | | 15 27½ | 18 57 | 55 11 | 8 48,2 | 61 20 | 29,58 | 61 | 62 | W. | | | | 3 6 | 4 58 38 | 59 19 | 55 40 | 29,51 | 48 | 48 | W. | | | | 6 15 | 5 2 46 | 5 | 5 | 29,60 | 57 | 56 | W. | | | | 53 51 | 19 59 23 | 20 | 7 92 | 55 40 | 29,60 | 57 | 56 | W. | | | | 0 5 | 20 | 7 | 92 | 55 40 | 29,60 | 57 | 56 | W. | | 25 | 24 | 18 18 | 4 14 45 | 11 13 | 9 12,8 | 55 40 | 29,60 | 57 | 56 | W. | | | | 22 32 | 18 59 | 15 27 | 55 0 | 29,69 | 50 | 59 | D. | | | | 3 49½ | 20 7 | 10 56 | 55 0 | 29,69 | 50 | 59 | D. | | | | 8 1 | 11 34 | 15 9 | 55 0 | 29,69 | 50 | 59 | D. | | | | 28 | 13 49 | 4 10 14 | 6 41½ | 10 58,6 | 55 0 | 29,80 | 66 | 65 | D. | | | | 18 0½ | 14 29 | 10 56 | 55 0 | 29,80 | 66 | 65 | D. | | July | 23 | 59 | 19 27 28½ | 30 56 | 60 40 | 29,57 | 52 | 56 | W. | | | | 28 | 8 | 31 38 | 35 5 | 60 40 | 29,49 | 70 | 79 | W. | | | | 3 | 57 55 | 4 54 26 | 50 58 | 13 8,0 | 60 40 | 29,49 | 70 | 79 | W. | | | | 2 | 4 | 58 34 | 60 40 | 30,08 | 46 | 50 | W. | | | | 6 | 28 8½ | 19 31 39 | 35 8 | 60 40 | 30,08 | 46 | 50 | W. | | | | 32 | 18 | 35 48½ | 39 17 | 60 40 | 30,08 | 46 | 50 | W. | | | | 43 | 40 | 47 10½ | 50 39½ | 58 40 | 30,08 | 46 | 50 | W. | | | | 47 | 50½ | 51 21 | 45 50½ | 58 40 | 30,08 | 46 | 50 | W. | | | | 7 | 41 29 | 4 37 58 | 34 28 | 14 48,1 | 58 40 | 30,16 | 56 | 54 | W. | | | | 45 | 39 | 42 9 | 38 39 | 50 5 | 60 40 | 30,16 | 56 | 54 | W. | | | | 57 | 3 | 57 44 | 54 14 | 60 40 | 30,16 | 56 | 54 | W. | | | | 1 | 13 | 57 44 | 54 14 | 60 40 | 30,16 | 56 | 54 | W. | | | | 13 | 49 44 | 19 53 16 | 56 46 | 59 0 | 29,73 | 48 | 48 | D. | | | | 53 | 54 | 57 26 | 0 57 | 59 0 | 29,68 | 55 | 57 | D. | | | | 14 | 40 38 | 4 37 8 | 33 37 | 17 27,5 | 59 0 | 29,68 | 55 | 57 | D. | | | | 56 | 20½ | 19 59 53 | 3 24 | 58 20 | 29,60 | 49 | 48 | D. | | | | 0 | 31 | 20 4 4 | 7 35 | 58 20 | 29,60 | 49 | 48 | D. | | | | 15 | 34 40 | 4 31 8 | 27 36½ | 17 46,9 | 58 20 | 29,65 | 55 | 50 | D. | | | | 38 | 51 | 35 19½ | 31 49 | 58 20 | 29,65 | 55 | 50 | D. | | | | 27 | 55 57½ | 19 59 29 | 3 0 | 61 0 | 29,61 | 51 | 54 | D. | | | | 0 | 7 | 20 3 40½ | 7 12 | 61 0 | 29,61 | 51 | 54 | D. | | | | 28 | 41 56 | 4 38 24 | 34 53 | 21 18,9 | 61 0 | 29,67 | 67 | 70 | D. | | | | 46 | 6½ | 42 35 | 39 4 | 61 0 | 29,67 | 67 | 70 | D. | | Aug. | 1 | Put the clock back. | | | | | | | | | | | 3 | 52 4 | 19 55 40 | 59 15 | 61 0 | 29,65 | 45 | 50 | W. | | | | 56 | 21½ | 59 58½ | 3 34 | 61 0 | 29,64 | 60 | 56½ | W. | | | | 4 | 14 11 | 4 10 34½ | 6 59 | 5 35,4 | 61 0 | 29,64 | 60 | 56½ | W. | | | | 18 | 29 | 14 53 | 11 18 | 67 0 | 29,50 | 49 | 51 | D. | | | | 7 | 12 42½ | 19 16 13 | 19 42½ | 67 0 | 29,50 | 49 | 51 | D. | | | | 16 | 51½ | 20 22½ | 67 0 | 29,44 | 56 | 61 | D. | | | | 8 | 54 34 | 4 51 2½ | 67 0 | 29,44 | 56 | 61 | D. | | | | 58 | 44 | 55 14 | 51 44 | 66 20 | 29,98 | 46 | 49 | W. | | | | 15 | 34 37½ | 19 38 12 | 41 44½ | 66 20 | 29,98 | 46 | 49 | W. | | | | 38 | 55 | 42 29 | 66 20 | 29,98 | 46 | 49 | W. | 1769 ### Equal altitudes. | Times by the clock | Zenith distance | Barometer | Thermometers | Phænomena and Circumstances | |--------------------|----------------|-----------|--------------|-----------------------------| | **August** | | | | | | Lower Wire | Middle Wire | Upper Wire| Passed the Meridian | Inches | A | B | Observer | | 16 | 33 37 | 4 30 2 | 26 29 1/2 | 6 39 9 | 66 20 | 30,01 | 54 57 | W. O's L. L. | | | | | | | | | | westerly | | | 37 54 | 34 20 | 30 47 | | | | D. O's U. L. | | | 10 39 | 14 25 | 16 11 | | | | D. O's L. L. | | | 1 39 | 6 7 1/2 | 4 2 21 1/2 | | | | D. O's U. L. | | | | | | | | | | westerly | ### Apparent Times. | Zenith distances | Barometer | Thermometers | Phænomena and Circumstances | |------------------|-----------|--------------|-----------------------------| | September | | | | | 15 | 55 52 33 | 59 2 12 20 | 55 51 49 | 29,61 | 46 42 1/2 | W. O's U. L. on merid. | | 20 | 58 20 58 | 62 0 30 9 | 58 20 32 | 30,06 | 47 41 | D. O's L. L. ditto. | | 21 | 58 12 30 | 62 0 11 6 | 58 12 15 | 30,09 | 45 1/2 49 | D. O's U. L. ditto. | | 22 | 59 7 44 | 63 0 9 16 | 59 7 26 | 29,93 | 57 60 | D. O's L. L. ditto. | | 27 | 60 3 24 | 64 2 21 | 60 32 10 | 29,77 | 47 48 | W. O's U. L. ditto. | | 29 | 50 30 36 | 53 3 15 | 50 29 56 | 29,99 | 52 49 | W. α aquilæ on the merid. | | | 9 46 57 | 10 1 24 | | 29,97 | 43 38 1/2 | W. α persæ do.pl.qu.E. | | | 35 19 36 | 37 2 22 | | 29,78 | 42 1/2 38 | W. D's U. L. on merid. | | | 61 42 40 | 65 3 10 | | 29,98 | 47 47 1/2 | W. O's U. L. on merid. | | | 62 15 0 | 66 1 19 | | 29,79 | 46 45 1/2 | W. O's L. L. on merid. | | | 62 38 15 | 66 3 9 | | 29,19 | 46 39 | D. α cygni ditto. | | | 14 19 21 | 15 1 3 | | 29,82 | 32 28 1/2 | W. α aquilæ ditto. (v.g.) | | | 14 19 25 | 15 1 3 | | 29,82 | 32 28 1/2 | W. α cygni ditto. (v.g.) | | | 13 2 44 | 13 3 22 | | 29,84 | 28 27 | W. capella do.pl.qu.W. | | | 67 35 25 | 72 0 12 | | 29,90 | 37 34 | W. O's U. L. on the | | | 50 30 49 | 53 3 16 | | 29,90 | 38 32 | W. O's L. L. on merid. | | | 9 45 52 | 10 1 21 | | 29,86 | 31 28 | W. α aquilæ ditto. | | | 13 3 12 | 13 3 23 | | 29,83 | 31 27 | W. α persæ do.pl.qu.W. | | | 68 19 22 | 72 3 16 | | 30,20 | 25 18 1/2 | D. capell.do.ver.hazy | | | 20 12 18 | 21 2 7 | | 30,18 | 27 21 | D. α lyrae ditto. | | | 50 30 52 | 53 3 16 | | 30,18 | 27 21 | D. α aquilæ ditto. | | | 14 19 30 | 15 1 4 | | 30,17 | 26 20 1/2 | D. α cygni ditto. | | | 68 9 20 | 72 2 25 | | 30,22 | 29 23 1/2 | D. O's U. L. ditto. | | | 20 12 20 | 21 2 7 | | 30,18 | 29 26 1/2 | D. α lyrae ditto. | | | 14 19 36 | 15 1 4 | | 30,14 | 28 23 1/2 | D. α cygni ditto. | | | 9 46 48 | 10 1 23 | | 30,05 | 25 21 | D. α persæ do.pl.qu.E. | | | 13 3 34 | 13 3 23 | | 30,01 | 27 24 | D. capella ditto. ditto. | | | 50 30 24 | 53 3 15 | | 29,87 | 19 11 1/2 | W. α aquila on meridian | | | 14 18 51 | 15 1 3 | | 29,87 | 17 1/2 10 1/2 | W. α cygni ditto. | | | 9 45 54 | 10 1 21 | | 30,07 | 14 9 1/2 | W. α persæ do.pl.qu.E.haz. | --- **Note:** The table contains detailed observations of celestial events and atmospheric conditions recorded in the years 1768 and 1769. It includes data such as times, zenith distances, barometric readings, thermometers' readings, and various phenomena observed at specific locations. | Year | Apparent Times | Zenith distances | Barometer | Thermometers | Phænomena and Circumstances | |------|----------------|------------------|-----------|--------------|----------------------------| | 1768 | November | | | | | | | | 90 Arch | 96 Arch | Inches | A B Observer | | | | ub. | reduced | | | | | | | G. S. V. | " | | | | | | | 90 29 11 53 3 12 | 6 50 28 37 | 29,65 + 6 -3 W. | α aquilæ on meridian | | | | 14 18 40 15 1 2 3 | 14 18 38 | 29,65 + 5 -3½ W. | α cygni ditto. | | | | 50 29 38 53 3 14 12 | 50 29 23 | 29,89 0 -3½ W. | α aquilæ ditto. | | | | 14 18 48 15 1 2 0 | 14 18 41 | 29,58 + 4 -5 D. | α cygni ditto. | | | | | | | | | | | | ** Many of the preceding observations can be of no use in determining the latitude of the place; but I thought it might be useful to insert them, as they serve to shew what a very great alteration happened in the position of the line of collimation of the quadrant, about this time. W. W. | | | | | | | | | | | | 9 45 40 10 1 20 15 | 9 45 6 | 29,62 + 7 -2 D. | α perf. on m. pla. qu. E. | | | | 13 2 53 13 3 21 20 | 13 2 20 | 29,63 + 5 -2 D. | capella ditto ditto. | | | | | | | | | | | | 29,87 -6½ -12½ D. | D's L. L. east merid. | | | | | | | | | | | | 29,87 -8 -13 D. | D's L. L. on merid. | | | | | | | | | | | | 29,88 -8 -14 D. | D's L. L. west merid. | | | | | | | | | | | | 9 46 32 10 1 23 20 | 9 46 20 | 29,88 -2 -13½ D. | α perf. on mer. pl. | | | | 13 3 32 13 3 23 24 | 13 3 9 | 29,89 -1 -14 D. | capella of qu. W. | | | | | | | | | | | | 29,90 0 -14 D. | α orionis on merid. | | | | | | | | | | | | 29,85 -10 -15 D. | α perf. do. pl. qu. E. | | | | | | | | | | | | 29,35 -8 -18 D. | α perf. on merid. pl. | | | | | | | | | | | | 29,37 -10 -18½ D. | capella of quad. E. | | | | | | | | | | | | 29,51 -5 -9 D. | α perf. on merid. pl. | | | | | | | | | | | | 29,63 -4 -12 D. | capella of quad. W. | | | | | | | | | | | | 29,55 -5 -16 D. | α urf. maj. on m. bel. p. | | | | | | | | | | | | 29,53 -6 -16 D. | polaris do. above pole | | | | | | | | | | | | 29,52 -6 -16 D. | α urf. maj. do. bel. pole | | | | | | | | | | | | 29,56 -1 -8 D. | α urf. maj. do. do. | | | | | | | | | | | | 29,56 -2 -10 D. | polaris do. above pole | | | | | | | | | | | | 29,56 -2½ -10½ D. | α urf. maj. do. bel. pole | | | | | | | | | | | | 29,53 -3 -12 D. | α perf. do. pl. qu. E. | | | | | | | | | | | | 29,54 -11½ -25 W. | α urf. maj. do. bel. pole | | | | | | | | | | | | 29,54 -9 -25 W. | α perf. do. pl. qu. W. | | | | | | | | | | | | 30,10 -10 -21½ W. | γ urf. maj. do. bel. pol. | | | | | | | | | | | | 30,21 -3 -15½ W. | do. do. do. | | | | | | | | | | | | 30,21 -3 -16 W. | ζ urf. maj. do. do. | | | | | | | | | | | | 29,54 -10 -25 W. | α perf. do. pl. qu. E. | | | | | | | | | | | | 29,54 -24 -25 D. | α urf. maj. do. bel. pol. | | | | | | | | | | | | 29,94 -23½ -25 D. | polaris do. above pole | | | | | | | | | | | | 29,95 -23½ -25 D. | α urf. maj. do. bel. pole | | | | | | | | | | | | 29,89 -15 -21 W. | γ urf. maj. do. do. | | | | | | | | | | | | 29,89 -15 -21 W. | polaris do. above pole | 1769 | Year | Apparent Times | Zenith Distances | Barometer | Thermometers | Phenomena and Circumstances | |------|----------------|------------------|-----------|--------------|----------------------------| | 1769 | | | | | | | | | 90 Arch | 96 Arch | Su. | 96 Arch | | | | G. S. V. | reduced | | | | January | | | | | | | 1 | | 70 41 475 1 19 11 | 70 40 59 29,94 | -25 -29 | W. urf. maj. on mer. bel. the pole | | D | | 70 41 975 1 19 12 | 70 40 50 30,16 | -25 -27 | W. polaris, ditto, ditto | | 17 | | 42 45 20 45 2 13 | 0 42 45 5 29,46 | -34 -39 | W. urf. maj. ditto, ditto | | 18 | | 29 16 16 31 0 28 | 12 29 15 49 29,45 | -34 -38 | W. aldebaran on the meridian | | | | 70 41 30 75 1 19 14 | 70 40 56 29,44 | -34 -39 | W. polaris on merid. above the pole | | | | 42 45 20 45 2 14 | 0 42 45 12 29,36 | -34 -36 | W. urf. maj. ditto below the pole | | | | 65 2 27 69 1 15 | 1 40 29,45 | -34 -36 | W. urf. maj. ditto, ditto | | | | 2 39 44 2 3 12 | 2 39 46 29,55 | -33 -36 | W. aldebaran on the meridian | | | | 8 20 20 8 3 19 16 | 8 20 16 29,55 | -33 -36 | W. ditto, ditto above the pole | | h | | 70 41 28 75 1 19 15 | 70 40 55 29,74 | -31 -36 | W. ditto, ditto below the pole | | h | | 75 24 10 80 1 22 | 2 75 23 42 30,13 | -37 -40 | W. capella, ditto, ditto | | 29 | | 70 41 38 75 1 19 | 8 70 41 2 30,08 | -30 -34 | W. urf. maj. ditto, ditto | | | | 9 46 7 10 1 21 | 3 9 45 44 30,07 | -30 -35 | W. persi, ditto above the pole | | | | 13 3 7 13 3 22 | 0 13 3 30,05 | -31 -36 | W. capella, ditto, ditto | | | | 2 39 52 2 3 12 | 14 2 39 44 30,00 | -35 -40 | W. urf. maj. ditto, ditto | | | | 8 19 4 8 3 16 | 10 8 19 30,00 | -35 -40 | W. urf. maj. ditto, ditto | | | | 72 7 52 76 3 24 | 24 72 7 30 29,99 | -36 -41 | W. persi, ditto below the pole | | | | 75 23 56 80 1 22 | 10 75 23 28 29,98 | -36 -41 | W. capella, ditto | | D | | 70 41 28 75 1 19 15 | 70 40 55 29,97 | -28 -31 | W. urf. maj. ditto, ditto (hazy) | | | | 13 3 8 13 3 22 | 10 70 56 29,96 | -29 -30 | W. capella, ditto above the pole | | | | 9 46 16 10 1 22 | 20 9 45 54 30,17 | -24 -31 | W. persi, ditto, ditto | | | | 13 3 10 13 3 22 | 12 13 2 54 30,16 | -26 -31 | W. capella, ditto, ditto | | | | 13 3 16 13 3 23 | 20 13 3 13 29,79 | -16 -20 | D. capella, ditto, ditto | | Feb. | | 51 26 36 54 3 16 | 24 51 26 19 29,79 | -16 -20 | D. orionis on the meridian | | | | 42 45 30 45 2 13 | 12 42 44 53 30,03 | -13 -12 | D. aldebaran, ditto | | | | 13 3 30 13 3 23 | 10 13 3 30,93 | -13 -13 | D. capella, ditto above the pole | | | | 51 26 32 54 3 16 | 24 51 26 19 30,02 | -13 -13 | D. orionis on the meridian | | | | 53 7 16 35 1 10 | 20 33 6 52 29,83 | -13 -9 | D. polaris, ditto below | | | | 42 45 38 45 2 13 | 10 42 44 55 29,60 | +7 +12 | D. aldebaran on the meridian | | | | 13 3 28 13 3 23 | 24 13 3 19 29,59 | +9 +12 | D. capella, ditto above the pole | | | | 33 7 36 35 1 10 | 10 33 7 30,32 | -16 -21 | D. polaris below | | | | 75 24 17 80 1 23 | 23 75 23 50 30,33 | -21 -26 | D. capella below the pole | | | | 75 24 22 80 1 23 | 18 75 23 52 29,93 | -26 -27 | W. ditto, ditto | | | | 9 46 26 10 1 22 | 10 9 46 4 29,98 | -17 -21 | W. persi on merid. above the pole | | | | 13 3 28 13 3 22 | 6 13 3 29,96 | -18 -21 | W. capella, ditto, ditto | | | | 42 45 52 45 2 14 | 0 42 45 32 29,74 | -19 -29 | D. aldebaran on the meridian | | | | 51 26 20 54 3 15 | 22 51 25 55 29,74 | -21 -30 | D. orionis, ditto | | | | 13 3 28 13 3 23 | 24 13 3 29,83 | -20 -28 | D. capella, ditto | | | | 51 26 24 54 3 15 | 20 51 25 57 29,84 | -20 -28 | D. orionis, ditto | | | | 33 7 17 35 1 10 | 10 33 6 56 29,93 | -29 -37 | D. polaris, ditto below the pole | | | | 51 26 45 45 3 14 | 14 51 25 36 29,90 | -25 -31 | D. orionis on the meridian | | | | 42 45 24 45 2 13 | 3 42 45 2 30,02 | -28 -31 | W. aldebaran on the meridian | | | | 42 45 22 45 2 13 | 0 42 45 5 29,86 | -18 -15 | W. ditto, ditto (v.g.) | | | | 53 7 20 55 1 10 | 22 33 6 50 29,70 | -31 -36 | D. polaris on the meridian below | | | | 75 24 34 80 1 24 | 22 75 24 14 29,69 | -36 -41 | D. capella, ditto, ditto | 1769 | Year | Appar. Time | Zenith distances | Barometer | Thermometers | Phænomena and Circumstances | |------|-------------|------------------|-----------|--------------|----------------------------| | 1769 | May | | | | | | | | 50 Arch | 96 Arch | Subt. | | | | | | | 96 Arch | | | | | | | reduced | | | | | | Inches | A | B | | | | | | Observer | | | May | | | | | | | 2 | 12 5 57 22 | 50 57 0 | G. S. V. | | | | | 6 0 31 54 0| | | | | | | 4 10 51 0 | | | | | | | 6 59 49 0 | | | | | | | 21 53 50 44| 32 54 0 15 4 | 50 44 1\(\frac{1}{2}\) | 30,14 +27 +24 W. | D's U. L. east of the merid. | | | 36 51 49 0 | | | | | | | 39 15 51 0 | | | | | | | 42 56 54 0 | | | | | | | 46 12 57 0 | | | | | | | 51 54 51 3 | | | | | | | 38 25 32 40| 3 29 0 | 38 24 56 | 30,14 +21 +15 W. | arcturus on the meridian | | | 37 59 44 40| 2 3 9 | 37 59 18 | 29,74 +41 +42 W. | O's U. L. ditto | | | 38 9 29 40| 2 26 20 | 38 9 13 | 29,87 +36 +43 W. | O's L. L. ditto (hazy) | | | 38 25 24 40| 3 29 6 | 38 24 50 | 29,44 48 44 W. | arcturus on the meridian | | | 64 29 0 68| 3 4 18 | 04 28 39 | 29,68 54 58 D. | D's U. L. ditto | | | 61 51 50 65| 3 29 0 | 61 51 11 | | | | | 62 53 17 67| 0 10 16 | 62 52 53 | | | | | 12 6 9 0 70| 20 0 | | | | | | 14 14 10 0 | | | | | | | 19 51 0 | | | | | | | 26 3 69 50 | | | | | | | 33 15 69 40| 73 3 19 13 | 69 16 34 | 29,78 42 40 D. | D's U. L. east of the merid. | | | 11 10 69 17| 5 | | | | | | 46 51 69 40| 0 | | | | | | 54 16 69 50| 0 | | | | | | 3 0 44 70 0| 0 | | | | | | 35 3 31 37| 1 19 22 | 35 3 18 | 29,76 57 64 W. | O's U. L. on the merid. | | | 35 35 6 37| 3 26 12 | 35 34 40 | | | | | 35 36 12 37| 3 28 6 | 35 35 39 | 29,79 54 56 W. | O's L. L. on the merid. | | | 35 4 20 37| 1 20 16 | 35 3 50 | | | | | 6 19 22 6 2| 31 20 | 18 53 | 29,57 52 49 W. | \(\beta\) draconis on the meridian | | | 7 16 20 7 3| 1 18 | 7 16 5 | 29,57 51 48 W. | \(\gamma\) plane of the quadrant east | | | 7 15 36 7 3| 0 13 | 7 15 43 | 29,68 56 52 W. | \(\gamma\) drac. do. pl. of quadr. west | | | 6 18 56 6 2| 30 11 | 6 18 38 | 30,14 50 44 W. | \(\beta\) draconis ditto, plane of the quadrant east (foggy) | | | 7 16 22 7 3| 1 4 | 7 16 19 | 30,13 49 43 W. | \(\gamma\) drac. do. pl. of quadr. west | | | 7 15 43 7 3| 0 14 | 7 15 42 | 29,44 57 53 W. | \(\beta\) draconis, plane of the quadrant west | | | 6 18 46 6 2| 30 18 | 6 18 31 | 29,64 54 50 W. | \(\gamma\) quadrant west | | | 7 15 36 7 3| 0 18 | 7 15 38 | 29,64 53 48 W. | \(\beta\) draconis on the meridian | | | 6 19 27 6 3| 0 25 | 6 19 16 | 29,66 56 52 W. | \(\gamma\) plane of the quad. east | | | 7 16 18 7 3| 1 10 | 7 16 13 | 29,66 56 51 W. | \(\beta\) draconis on the meridian | | | 6 18 30 6 2| 29 2 | 6 18 24 | 29,63 54 50 W. | \(\gamma\) plane of the quad. west | | | 7 15 40 7 3| 0 12 | 7 15 44 | 29,63 54 49 W. | \(\gamma\) drac. do. pl. of quadr. east | | | 7 16 23 7 3| 1 8 | 7 16 15 | 29,69 62 58 D. | \(\gamma\) drac. on mer. pl. of quad. west | | | 7 15 30 7 3| 0 20 | 7 15 30 | 29,67 55 47 W. | \(\gamma\) drac. do. pl. of quadr. east | | | 40 55 30 43| 2 19 8 | 40 55 5\(\frac{1}{2}\) | 29,73 57 59 W. | O's U. L. on merid. clouds | | | 41 27 28 44| 0 28 10 | 41 27 8 | 29,62 55 47 W. | \(\gamma\) drac. do. pl. of quadr. east | 1769 | Year | Apparent Times | Zenith distances | Barometer | Thermometers | Phenomena and Circumstances | |------|----------------|------------------|-----------|--------------|-----------------------------| | 1769 | | | | | | | August | | | | | | | h | | | | | | | 5 | | | | | | | 2 | | | | | | | 4 | | | | | | | 6 | | | | | | | 8 | | | | | | | 10 | | | | | | | 12 | | | | | | | 14 | | | | | | | 16 | | | | | | | 18 | | | | | | | 20 | | | | | | | 22 | | | | | | | Year | Time per clock | Apparent Time | Occultations of Fixed Stars by the Moon, &c. Observed | |------|----------------|---------------|-----------------------------------------------------| | 1768 | | | | | September | | | | | 21 | | | | | 23 | | | | | 25 | | | | | 27 | | | | | 29 | | | | | Mar. 15 | | | | | 11 | | | | | 13 | | | | | 15 | | | | | 17 | | | | | 19 | | | | | Apr. 9 | | | | | 10 | | | | | 12 | | | | | 14 | | | | | Aug. 11 | | | | | 9 | | | | | 11 | | | | The * No 43 of Ophiuchi in Mr. Flamsteed's catalogue immersed behind the dark limb of the D (very faint) J. D. B in the same constellation and catalogue immersed J. D. Ditto per W. W. N. B. The immersion happened towards the northern limb of the D so very near the interlection of light and darkness, as to render the observation doubtful to 2 or 3". The following Table for the Micrometer I received from the late Mr. Short, along with the Instrument. Wm. Wales. | Inches | Decim. of an in. | Vernier | Vernier | |--------|-----------------|---------|---------| | | | ' " | " | | 1 | 6 50,2 | 0,05 | 0 20,5 | 1 0,8 | 20 16,4 | | 2 | 13 40,4 | 10 | 0 41,0 | 2 1,6 | 21 17,2 | | 3 | 20 30,6 | 15 | 1 1,5 | 3 2,5 | 22 18,1 | | 4 | 27 20,9 | 20 | 1 22,0 | 4 3,3 | 23 18,9 | | 5 | 34 11,1 | 25 | 1 42,6 | 5 4,1 | 24 19,7 | | | | | | | | | | | | | | | | Times per clock | Apparent Times | Parts of the micrometer reduced | Observations on the Transit of Venus | |-----------------|----------------|---------------------------------|-------------------------------------| | June | | | | | h 30 56 49 | 0 57 0,6 | | Exterior contact at the ingress | | 56 56 | 0 57 7,6 | | Ditto | | 1 15 10 | 1 15 21,3 | | Interior ditto | | 15 14 | 1 15 25,3 | | Ditto | | 57 21 | 57 31 1/2 | 0,40 | Dift. of Θ's farthest limb from the Θ's nearest | | 58 36 | 58 46 1/2 | 0,10 | Θ's diameter off the scale | | 2 1 16 | 2 1 26 2/3 | 4,60 | Θ's diameter | | 2 | | | Cloudy a short time | | 4 11 | 4 21 1/2 | 4,25 | Dift. of Venus's farthest limb from the Θ's farthest | | 5 5 | 6 8 1/2 | 0,10 | Θ's diameter on the scale | | 7 33 | 7 43 1/2 | 0,50 | Dift. of Θ's farthest limb from the Θ's nearest | | 9 9 | 9 19 1/2 | 0,10 | Θ's diameter on the scale | | 10 26 | 10 30 1/4 | 0,15 | Ditto off the scale | | 12 | | | Cloudy | 1769 | Times per clock | Apparent times | Parts of the micrometer | Micro-meter reduced | |-----------------|----------------|-------------------------|--------------------| | June | h' " | h' " | | | 39 | 39 | 10 | | | 44 43 | 44 52 | 0.70 | | | 51 40 | 51 49 | 0.10 | | | 53 26 | 53 35 | 0.15 | | | 3 4 58 | 3 5 72 | 0.80 | | | 6 13 | 6 22 | 0.10 | | | 17 47 | 17 56 | 4.60 | | | 19 40 | 19 49 | 0.85 | | | 22 20 | 22 29 | 0.85 | | | 23 38 | 23 47 | 0.10 | | | 24 35 | 24 44 | 0.10 | | | 42 47 | 42 55 | 0.10 | | | 46 40 | 46 48 | 0.90 | | | 48 0 | | | | | 48 49 | 48 57 | 0.90 | | | 51 33 | 51 41 | 0.90 | | | 55 24 | 55 32 | 0.90 | | | 56 19 | 56 27 | 0.90 | | | 59 2 | 59 10 | 0.90 | | | 4 0 50 | 4 0 58 | 0.90 | | | 2 51 | 2 59 | 0.90 | | | 5 23 | 5 31 | 0.90 | | | 7 12 | 7 20 | 0.90 | | | 11 5 | 11 13 | 0.90 | | | 14 37 | 14 45 | 0.90 | | | 17 50 | 17 58 | 0.90 | | | 19 50 | 19 58 | 0.10 | | | 21 30 | 21 38 | 0.10 | | | 23 27 | 23 35 | 4.60 | | | 25 42 | 25 50 | 4.60 | | | 27 12 | 27 20 | 4.60 | | | 28 42 | 28 50 | 4.60 | | | 30 56 | 31 4 | 0.90 | | | 35 39 | 35 47 | 0.90 | | | 44 25 | 44 32 | 0.85 | | | 46 14 | 46 21 | 0.85 | | | 50 16 | 50 23 | 0.85 | | | 57 20 | 57 27 | 0.80 | | | 5 32 55 | 5 32 2 | 0.70 | | | 34 52 | 34 59 | 0.65 | | | 41 52 | 41 51 | 0.15 | | | 42 52 | 42 36 | 0.10 | | **Observations on the Transit of Venus.** - **O's horizontal diameter** - Dist. of Φ's farthest limb from the O's nearest Φ's diameter on the scale of the micrometer - Ditto off - Dist. of Φ's farthest limb from the O's nearest Φ's diameter on the scale Cloudy - **O's inclined diameter** - Dist. of Φ's farthest limb from the O's nearest Φ's diameter on the scale - Ditto off - Ditto ditto N. B. Several of the above observations are a little uncertain, being taken in great haste, in the intervals between flying clouds. W. W. Dist. of Φ's farthest limb from the Sun's nearest A small cloud Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Ditto Φ's diameter on the scale Ditto off W. W. **O's inclined diameters** Dist. of Φ's farthest limb from the Sun's nearest Ditto Ditto Ditto Ditto Ditto Ditto Φ's diameter on the scale Ditto off J. D. Vol. LIX. ### Observations on the Transit of Venus continued. | Times per clock | Apparent times | Parts of the micrometer | Micro-meter reduced | Observations | |-----------------|----------------|-------------------------|---------------------|--------------| | June | | | | | | h 35 43 37 | 5 43 43 | 0 15 2 | 0 59 8 | Φ's diameter on the scale | | 45 45 | 45 51 | 0 10 2 | 1 1 5 | Ditto off | | | | 0 15 2 | 0 59 8 | Ditto on | | 53— | 53 61 | 4 60 13 2 | 3 1 34 8 | Θ's horizontal diameter | | 55— | 53 61 | 4 60 14 | 3 1 35 2 | Φ's diameter on the scale | | 59 59 | 59 21 | 2 15 4 | 1 1 5 | Ditto off | | 6 0 41 | 6 0 47 | 0 10 18 | 0 59 1 | Ditto ditto | | 1 49 | 1 53 | 0 10 2 | 1 1 5 | Ditto ditto | | 3 30 | 3 30 | 0 50 18 | 3 36 6 | Diff. of Φ's farthest limb from the Θ's nearest | | 4 40 | 4 40 | 0 50 14 2 | 3 33 7 | Ditto | | 6 55 | 7 15 | 0 50 11 | 3 30 8 | Ditto | | 8 15 | 8 21 | 0 50 9 | 3 29 2 | Ditto | | 15 6 | 15 12 | 0 45 15 | 3 13 6 | Ditto | | 17 6 | 17 12 | 0 45 8 | 3 7 9 | Ditto | | 19 6 | 19 12 | 0 45 1 | 3 2 1 | Ditto | | 21 5 | 21 11 | 0 40 21 | 2 58 0 | Ditto | | 25 27 | 25 33 | 0 40 6 | 2 45 7 | Ditto | | 26 59 | 27 1 | 0 40 2 | 2 42 4 | Ditto | | 28 19 | 28 25 | 0 40 0 | 2 40 8 | Ditto | | 7 0 40 | 7 0 45 | 0 45 1 | | The thread of light broke at the internal contact | | 0 43 | 7 0 48 | Ditto | | W. W. | | 18 56 | 7 19 | The external contact | very hazy, and the limbs badly defined | | 19 15 | 7 19 | Ditto | J. D. | ### Remarks 1. All the measurements of Venus's diameter; and also all those of the Sun, which are not said to be horizontal, were taken with the micrometer, in the same direction that the last preceding distance of the limbs of Venus and the Sun was measured with. 2. We were obliged to alter the rack-work of the micrometer before we began to measure any distances of the limbs, &c. in order to make it take in the diameter of Venus, off the scale. 3. The heavens at the beginning, and for a considerable time both before and after, were frequently obscured by clouds: but in the intervals, the air was very clear, and the Sun's limbs extremely well defined. 4. Soon after Venus was half immersed, a bright crescent, or rim of light, encompassed all that part of her circumference which was off the Sun; thereby rendering her whole periphery visible. This continued very bright until within a few minutes of the internal contact, and then vanished away gradually. 5. We took for the instant of the first internal contact, the time when the least visible thread of light appeared behind the subsequent limb of Venus: but before that time, Venus's limb seemed within that of the Sun, and his limb appeared behind hers in two very obtuse points, seeming as if they would run together in a broad stream, like two drops of oil; but which nevertheless did not happen, but joined in a very fine thread, at some distance from the exterior limb of Venus. This appearance was much more considerable at the edges than at the ingrefts; owing, as we apprehend, to the bad state of the air at that time. We took for the instant of internal contact, at the edges, the time when the thread of light disappeared before the preceding limb of the planet, from which time W. W. took notice that he had told about 24" when the limbs of the Sun and Venus were apparently in contact: a circumstance which he did not venture to attend to at the ingrefts. 6. We saw nothing like the appearance of an atmosphere round Venus (unless the above-mentioned phenomena may be thought to proceed from thence) either at the beginning, end, or during the time of the transit: nor could we see any thing of a satellite; though we looked for it several times. 7. It may not be improper to add, that the haziness, complained of at the edges, was not owing to any accidental bad quality of the air at that time; it is continually so here to 10° or 12° above the horizon, and often even to 16° or 18°, in what may be called the clearest state of the heavens. Observations for determining the Magnetic Variations at Prince-of-Wales's Fort on the North-west Coast of Hudson's Bay, by W. W. The variation compass, which I received from Mr. Robertson, by order of the Royal Society, was, when I received it, a very good one, as appeared to me from several trials which I made of it in London, before it was put on board the ship; but when we arrived in Hudson's Bay, and were ready to make use of it, we had the mortification to find that the needle thereof had, by some cause or other, entirely lost its magnetic virtue. As the cold was, by the time that we made this discovery, much more intense than it probably was at the time that Mr. Ellis complains of a similar circumstance happening to him in those parts, I was naturally led to try whether I could not benefit by his experience, and accordingly removed the compass into the room where we lived; which was kept very warm by a large fire, and by the house stove; and there it remained ever after, but without the least effect. In order to remedy this misfortune as much as lay in my power, I applied to Captain Richards, as soon as he arrived in the river this year; and desired he would send me his azimuth compass on shore, with which request he very kindly complied the next day; but the cloudy weather prevented me from making any observations before the 22d of August. The compass is of the common form, and I judged that it would be best to make the observations about noon, when the Sun's azimuths change the fastest, and to note the times by the clock; which I did in the following manner: | Times by the clock | Magnetic azimuth | Variation west | |--------------------|-----------------|---------------| | August 1769 | | | | 21 23 40 29 | 1 23 W | 10 6 | | 44 48 | 2 0 W | 9 17 | | 49 53 | 3 20 W | 9 2 | | 52 53 | 4 30 W | 9 6 | | 6 40 | | | | 23 18 | 15 15 W | 9 43 | | 25 22 | 16 17 W | 10 3 | | 27 8 | 16 39 W | 9 50 | | 23 28 59 | 2 38 E | 9 49 | | 31 15 | 1 50 E | 9 52 | | 34 5 | 0 47 E | 9 59½ | | 42 20 | 2 0 W | 10 3½ | | 44 10 | 2 38 W | 10 42 | | 45 40 | 3 12 W | 10 7½ | | 49 45 | 4 21 W | 9 57 | | 52 44 | 5 20 W | 9 51 | | 54 4 | 5 40 W | 9 50 | | 6 38,6 | | | | 12 43 | 11 25 W | 9 24 | | 25 13 | 15 28 W | 9 18 | | 26 26 | 16 7 W | 9 33 | | 28 8 | 16 30 W | 9 22 | | 34 38 | 18 40 W | 9 24 | | 36 16 | 19 22 W | 9 33½ | The mean is 9 41½ These observations were made by Captain Richards; the compass having been removed, and the card re-adjusted after the first. The Sun transited the meridian By myself; the compass having been moved, and the card re-adjusted. The compass placed as it was yesterday before noon The compass removed, &c. Ditto The Sun transited the meridian The compass removed, &c. The compass again removed, and the card re-adjusted Ditto Such are the best observations of this kind, which I am able to lay before this honourable and learned Society. It gives me much concern to find that they differ so widely from one another; more especially as I am certain that I made them with all the care and circumspection that I was capable of, and with an instrument which seemed to me good of its kind. But I flatter myself it will be considered, that, in making observations with this instrument, there are two unavoidable sources of error, viz. in adjusting the card to the line on the side of the compass-box, and in making the shadow of the thread to fall on the line of the index: I may likewise add a third error, which may be committed in reading of the vernier, as it only subdivides to every 5', and if all these should happen to fall the same way, their sum, I presume, may be confideable (when an instrument of so small a radius is used), in the hands of the most skilful observer. The Latitude of Prince of Wales's Fort on the North-west coast of Hudson's Bay, deduced from Observations of circumpolar Stars. | Date of the Observation | Latitude deduced | |------------------------|------------------| | Above the pole | Below the pole | | | 90° Arch | 96° Arch | | Jan. 20 | 18° 47' 29" | 18° 47' 53" | | Jan. 29 | 18° 47' 27" | 18° 47' 51" | | | 18° 47' 33" | 18° 47' 52" | | | 18° 47' 29" | 18° 47' 50" | The means of these are 18° 47' 30" | 18° 47' 51" | Date of the Observation | Latitude deduced | |------------------------|------------------| | Above the pole | Below the pole | | | 90° Arch | 96° Arch | | Jan. 29 | 18° 47' 23" | 18° 47' 36" | | Jan. 30 | 18° 47' 23" | 18° 47' 31" | | Jan. 31 | 18° 47' 24" | 18° 47' 30" | | Febr. 5 | 18° 47' 28" | 18° 47' 39" | | Febr. 8 | 18° 47' 34" | 18° 47' 48" | | Jan. 29 | 18° 47' 31" | 18° 47' 37" | | Jan. 30 | 18° 47' 30" | 18° 47' 44" | | Jan. 31 | 18° 47' 31" | 18° 47' 38" | | Febr. 5 | 18° 47' 34" | 18° 47' 46" | | Febr. 8 | 18° 47' 41" | 18° 47' 51" | | Jan. 29 | 18° 47' 22" | 18° 47' 35" | | Jan. 30 | 18° 47' 23" | 18° 47' 30" | | Jan. 31 | 18° 47' 24" | 18° 47' 29" | | Febr. 5 | 18° 47' 28" | 18° 47' 38" | | Febr. 8 | 18° 47' 33" | 18° 47' 43" | | Jan. 29 | 18° 47' 32" | 18° 47' 36" | | Jan. 30 | 18° 47' 21" | 18° 47' 35" | Means of these are 18° 47' 32" | 18° 47' 48" ### By Capella continued | Date of the Observation | Latitude deduced | |------------------------|------------------| | Above the pole | Below the pole | | | 90 Arch | 96 Arch | | Jan. | Febr. | | | 31 | 13 | | | | 58° 47' 22" | 58° 47' 29" | | | 58° 47' 25" | 58° 47' 36" | | | 58° 47' 32" | 58° 47' 43" | | | 58° 47' 30" | 58° 47' 36" | | | 58° 47' 31" | 58° 47' 32" | | | 58° 47' 31" | 58° 47' 36" | | Means of these are | 58° 47' 29" | 58° 47' 37" | ### By α Persei | Date of the Observation | Latitude deduced | |------------------------|------------------| | Above the pole | Below the pole | | | 90 Arch | 96 Arch | | Jan. | Febr. | | | 20 | 29 | | | | 58° 47' 23" | 58° 47' 28" | | | 58° 47' 28" | 58° 47' 33" | | | 58° 47' 33" | 58° 47' 38" | | Means of these are | 58° 47' 28" | 58° 47' 33" | **Note:** These four stars passed the meridian to the southward of the zenith, when above the pole; which circumstance rendered them vastly convenient for determining the latitude of the place, as the error of the line of collimation of the quadrant is thereby entirely excluded, provided it did not alter in the interval between the observations. ### The Latitude of Prince of Wales's Fort deduced from Observations of the Sun, and of such stars as passed south of the zenith. #### By the Sun | Date | Declination | Latitude deduced | |------------|-------------|------------------| | | | 90 Arch | 96 Arch | | Sept. | | | | 20 | 0° 42' 9" | 58° 48' 19" | 58° 47' 57" | | 21 | 0° 18' 44" | 58° 48' 20" | 58° 48' 14" | | Oct. | | | | 22 | 0° 4' 40" | 58° 48' 15" | 58° 48' 2" | | 30 | 3° 11' 59" | 58° 48' 15" | 58° 48' 3" | | 14 | 8° 32' 49" | 58° 48' 18" | 58° 48' 12" | | 17 | 9° 39' 4" | 58° 48' 32" | 58° 48' 7" | | June | | | | 23 | 23° 28' 5" | 58° 47' 38" | 58° 47' 26" | | 22 | 23° 27' 40" | 58° 48' 10" | 58° 47' 46" | | August | | | | 21 | 17° 36' 18" | 58° 48' 12" | 58° 48' 6" | | 5 | 16° 48' 8" | 58° 48' 16" | 58° 48' 7" | | 22 | 11° 33' 11" | 58° 48' 14" | 58° 47' 27" | | The means of these are | 58° 48' 15" | 58° 48' 0" | #### By Capella | Date | Declination | Latitude deduced | |------------|-------------|------------------| | | | 90 Arch | 96 Arch | | Oct. | | | | 13 | 45° 44' 10" | 58° 47' 34" | 58° 47' 33" | | 14 | 58° 48' 32" | 58° 47' 46" | | 17 | 58° 47' 48" | 58° 47' 39" | | The means of these are | 58° 47' 48" | 58° 47' 39" | #### By α Persei | Date | Declination | Latitude deduced | |------------|-------------|------------------| | | | 90 Arch | 96 Arch | | Sept. | | | | 29 | 29° 49' 1" | 58° 47' 47" | 58° 47' 53" | | Oct. | | | | 14 | 14° 49' 1" | 58° 47' 47" | 58° 47' 39" | | 17 | 58° 47' 44" | 58° 47' 21" | | The means of these are | 58° 47' 46" | 58° 47' 38" | 1768 | By α Lyrae | Latitude deduced | |------------|------------------| | Declination | 90 Arch | 96 Arch | | 1768 | 0° 1' " | 0° 1' " | | Oct. | 16° 38' 34" | 58° 47' 21" | | | 17 | 58° 47' 24" | | The means of these are | 58° 47' 22" | 58° 47' 33" | | By Capella | Latitude deduced | |------------|------------------| | Declination | 90 Arch | 96 Arch | | 1768 | 0° 1' " | 0° 1' " | | Nov. | 16° 45' 44" | 58° 47' 54" | | | 18 | 58° 47' 43" | | | 28 | 58° 47' 26" | | | 29 | 58° 47' 38" | | The means of these are | 58° 47' 40" | 58° 47' 23" | | By α Aquilae | |---------------| | Sept. | 8° 16' 22" | | Oct. | 13 | | | 14 | | | 16 | | The means of these are | 58° 48' 0" | 58° 47' 33" | | By β Draconis | |---------------| | June | 24° 52' 28" | | July | 20 | | | 21 | | | 22 | | The means of these are | 58° 48' 6" | 58° 47' 50" | | By γ Draconis | |---------------| | June | 24° 51' 31" | | July | 2 | | | 7 | | | 18 | | | 20 | | | 21 | | | 22 | | | 28 | | | 30 | | August | 4 | | The means of these are | 58° 47' 44" | 58° 47' 41" | The Latitude of Prince of Wales's Fort deduced from Observations of Stars on the Northern Meridian. | By α Ursa Majoris | Latitude deduced | |-------------------|------------------| | Polar dist. | 90 Arch | 96 Arch | | 1768 | 0° 1' " | 0° 1' " | | Decem. | 2° 27' 0" | 58° 47' 14" | | | 3 | 58° 47' 3" | | | 6 | 58° 46' 57" | | | 15 | 58° 47' 8" | | The means of these are | 58° 47' 5" | 58° 47' 16" | | By γ Ursa Majoris | Latitude deduced | |-------------------|------------------| | Polar dist. | 90 Arch | 96 Arch | | 1768 | 0° 1' " | 0° 1' " | | Decem. | 1° 53' 5" | 58° 46' 50" | | | 3 | 58° 46' 58" | | | 6 | 58° 46' 59" | | The means of these are | 58° 46' 53" | 58° 47' 12" | 1769 | By γ Ursae Majoris | Latitude deduced | |-------------------|-----------------| | 1769 Polar dist. | 90 Arch | | | 96 Arch | | January | | | 159 31 35 | 58 47 10 | | | 58 47 2 | | The means of these are | 58 47 6 | The means of all the comparisons of γ Ursae Majoris Ditto of γ Ursae Majoris (considered as circumpolar) Ditto of Capella Ditto of α Persei Ditto of the Pole star The means of all the circumpolar stars are The means of α Ursae Majoris Ditto of γ Ditto of η The means of all the stars taken on the northern meridian are And the means of the above two are The means of all the solar observations are Ditto of Capella taken on the southern meridian alone Ditto of α Persei Ditto of α Lyrae Ditto of α Aquilae Ditto of α Cygni Ditto of Capella after the line of Collimation altered Ditto of α Persei Ditto of β Draconis, the line of collimation having again altered Ditto of γ The means of all the observations taken southward of the zenith are The means of the circumpolar and northern stars And, by taking the mean of both, the latitude is North The error of the line of collimation of the quadrant was 23",6 for the 90 arch, and 19",7 for the 96 arch, to be subtracted from all zenith distances, from the beginning of September, 1768, to the latter end of October; from about which time, till towards the latter end of December, it appears to have been 29",4' for the 92° arch, and 36",7 for the 96 arch, to be added to all zenith distances taken in that interval. About the latter end of December it altered again, but I had no opportunity of determining its quantity, and seemed to be pretty constant all the month of January, 1769; but, about the beginning or middle of February, it began again to alter, and continued uncertain until the middle or latter end of June, when it became constant again, and seemed to me to be, by the observations of β and γ Draconis, 21",6 and 15",5 to be subtracted from the 90 and 96 arches, respectively. W. W. A TABLE of the EQUATIONS to Equal Altitudes. Lat. 58° 47'1. Half the Interval between the Observations. | The O's | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | h | |---------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | Latitude | II 20 | III 30 | IV 40 | I 50 | II 10 | III 10 | IV 10 | V 10 | VI 10 | VII 10 | The instruments used in making the preceding observations were: 1. A clock, made by Mr. Ellicot, with an apparatus for correcting the effects of heat and cold; the same which Messieurs Mason and Dixon had to the Cape of Good Hope in the year 1761. 2. An astronomical quadrant, made by Mr. Bird, of one foot radius. 3. Two reflecting telescopes, of two feet focus, made by Mr. Short; and a divided object-glass micrometer, made by the same gentleman, of 501.45 inches focal length. We used the micrometer with a magnifying power of 60; the contacts of Venus with the Sun's limb were observed with a magnifying power of 120, and all the other observations with one of 90. Both the thermometers, used in the preceding observations, were according to Fahrenheit's scale; and the characters + and —, which are annexed to their altitudes, denote that they stood so many degrees above or below the cypher respectively: where neither of those characters appears, the number is to be understood above the cypher. LXVI. Extra