Meteorological Journal, Kept by the Assistant Secretary, at the Apartments of the Royal Society, by Order of the President and Council

METEOROLOGICAL JOURNAL, KEPT BY THE ASSISTANT SECRETARY, AT THE APARTMENTS OF THE ROYAL SOCIETY, BY ORDER OF THE PRESIDENT AND COUNCIL. OBSERVANDA. Height of the Cistern of the Barometer above the plinth at Waterloo Bridge...83 feet 2 inches. ______________________ above the mean level of the sea .........................97 feet. Height of the receiver of the Rain Gauge above the court of Somerset House ..79 feet. The External Thermometer is 2 feet higher than the Barometer Cistern. The Thermometers are graduated to Fahrenheit's scale. The Barometer is divided into inches and tenths. The Hours of Observation are of Mean Time, the day beginning at Midnight. The daily observations of the Barometer are not corrected. The monthly means are corrected for capillarity and temperature by the Table contained in Mr. Baily's paper in Phil. Trans. for 1837. ## METEOROLOGICAL JOURNAL FOR JANUARY AND FEBRUARY, 1838. | 9 o'clock, A.M. | 3 o'clock, P.M. | External Thermometers. | |----------------|-----------------|-----------------------| | Barometer uncorrected. | Att. Ther. | Barometer uncorrected. | Att. Ther. | Draw Point of Wet & Dry Bulb Thermometer | Fahrenheit | Self-registering | Lowest | Highest | | Flint Glass. | Crown Glass. | Flint Glass. | Crown Glass. | SSE | 9 A.M. | 3 P.M. | | M 1 29.978 29.972 48.3 29.924 29.918 49.2 43 02.3 45.7 48.3 48.3 50.2 | | T 29.888 29.882 47.6 29.794 29.786 48.5 42 01.8 45.8 46.7 43.0 48.7 | | W 29.642 29.636 47.2 29.692 29.686 47.8 43 02.1 44.3 47.3 43.2 48.8 | | T 29.976 29.970 44.8 30.006 30.000 45.7 39 01.8 40.2 46.6 39.4 48.3 | | F 30.270 30.262 44.0 30.264 30.256 43.3 38 01.2 37.4 36.7 35.8 47.4 | | S 30.292 30.284 40.8 30.242 30.236 41.0 34 01.4 35.3 37.7 33.7 38.7 | | U 30.304 30.298 40.3 30.306 30.300 40.4 34 02.2 36.7 36.2 35.0 40.4 | | M 30.398 30.392 34.9 30.336 30.330 34.5 8 03.0 36.1 31.5 28.8 37.3 | | T 9.3012 30.204 29.8 30.162 30.156 29.3 23 24.0 23.4 23.0 32.8 | | O W 30.050 30.044 28.8 29.972 29.966 29.7 23 25.3 26.5 22.2 25.6 | | T 11 29.960 29.954 27.3 30.002 29.996 28.4 21 22.4 28.0 19.8 23.2 | | F 12 30.324 30.316 28.7 30.334 30.326 28.6 20 23.3 26.9 19.7 24.0 | | S 13 30.314 30.306 26.9 30.234 30.228 27.6 21 21.8 25.2 20.8 27.7 | | O 14 29.988 29.984 27.2 29.916 29.912 28.0 20 24.4 25.2 22.0 26.2 | | M 15 29.824 29.820 23.6 29.778 29.772 24.3 12 15.7 24.8 14.9 26.3 | | T 16 29.850 29.846 25.8 29.922 29.916 27.2 20 27.0 29.3 11.4 26.3 | | W 17 30.216 30.208 27.0 30.204 30.198 28.5 21 29.0 30.7 24.2 32.0 | | T 18 30.016 30.008 26.9 29.910 29.904 26.3 19 23.3 24.2 23.4 31.5 | | F 19 29.786 29.780 25.3 29.786 29.780 25.2 11 21.0 20.5 21.2 25.6 | | S 20 29.934 29.928 21.2 29.910 29.904 21.7 14 12.8 21.2 11.5 21.0 | | O 21 29.892 29.886 22.4 29.758 29.752 25.0 16 24.5 31.8 13.8 25.0 | | M 22 29.680 29.676 27.7 29.700 29.696 31.0 24 39.8 42.8 24.7 40.3 | | T 23 29.706 29.700 33.3 29.662 29.658 34.9 31 01.6 34.4 36.4 32.7 43.3 | | W 24 29.752 29.748 30.9 29.738 29.734 29.6 23 26.7 25.7 26.4 37.4 | | T 25 29.554 29.548 27.6 29.460 29.454 28.6 21 26.7 27.9 24.8 27.0 | | F 26 29.362 29.356 29.0 29.332 29.326 30.0 24 28.6 29.5 26.4 29.2 | | S 27 29.284 29.278 30.2 29.280 29.276 30.8 23 29.8 29.8 28.4 30.4 | | O 28 29.454 29.450 31.7 29.452 29.448 32.0 24 28.7 31.0 28.5 31.0 | | M 29 29.464 29.458 33.0 29.510 29.502 35.2 29 01.5 37.8 43.8 28.8 38.4 | | T 30 29.640 29.634 37.2 29.648 29.640 37.2 32 00.8 35.8 34.2 35.8 44.3 | | W 31 29.784 29.778 37.3 29.856 29.850 37.2 31 01.3 35.2 35.3 33.8 36.8 | MEAN. 29.897 29.891 32.5 29.874 29.868 33.1 25.9 01.6 30.1 32.4 27.1 34.4 .072 Mean Barometer corrected………………… F. 29.977 ….. 29.944 I.C. 29.970 ….. 29.956 ## METEOROLOGICAL JOURNAL FOR MARCH AND APRIL, 1838. | Date | Time | Barometer (uncorrected) | Att. Ther. | External Thermometers | Remarks | |------|------|-------------------------|------------|-----------------------|---------| | | 9 o'clock A.M. | Flint Glass | Crown Glass | Att. Ther. | Flint Glass | Crown Glass | Diff. of Wet Bulb | Diff. of Dry Bulb | Self-registering | Rain in inches | Wind at 9 A.M. | | | 3 o'clock P.M. | Flint Glass | Crown Glass | Att. Ther. | Flint Glass | Crown Glass | Fahrenheit | Highest | Lowest | Rain off at | Direction of wind at 9 A.M. | | 1838 | 29.124 | 29.118 | 44.3 | 29.104 | 29.098 | 45.6 | 39 | 0.18 | 43.7 | 47.5 | 41.8 | 49.2 | .133 | S | | F | 29.094 | 29.090 | 45.0 | 29.122 | 29.116 | 45.3 | 40 | 0.15 | 41.7 | 44.6 | 40.9 | 48.0 | .088 | NE | | S | 29.246 | 29.242 | 44.9 | 29.222 | 29.218 | 45.7 | 39 | 0.20 | 42.0 | 44.3 | 41.4 | 45.0 | .062 | W | | O | 29.030 | 29.024 | 42.8 | 29.000 | 28.998 | 43.6 | 38 | 0.03 | 38.5 | 45.2 | 37.6 | 45.3 | .105 | NE | | M | 29.614 | 29.506 | 43.7 | 29.820 | 29.814 | 44.8 | 37 | 0.21 | 41.2 | 42.7 | 38.4 | 47.6 | .108 | WSW | | T | 29.796 | 29.792 | 46.0 | 29.826 | 29.820 | 47.3 | 40 | 0.28 | 46.6 | 50.8 | 40.7 | 47.0 | .161 | NW | | W | 29.912 | 29.906 | 44.8 | 29.876 | 29.870 | 46.4 | 37 | 0.21 | 41.9 | 49.4 | 37.0 | 51.3 | .180 | W | | T | 30.116 | 30.103 | 43.7 | 30.200 | 30.194 | 45.6 | 36 | 0.32 | 42.2 | 47.3 | 37.8 | 50.0 | .180 | NW | | F | 30.302 | 30.296 | 43.2 | 30.216 | 30.208 | 44.2 | 37 | 0.20 | 37.3 | 44.2 | 35.2 | 47.8 | .180 | NW | | S | 30.000 | 29.996 | 42.0 | 29.922 | 29.916 | 44.4 | 38 | 0.29 | 40.3 | 45.3 | 35.0 | 44.9 | .180 | SE | | O | 29.778 | 29.772 | 43.2 | 29.782 | 29.776 | 44.0 | 36 | 0.31 | 39.8 | 45.5 | 36.6 | 46.4 | .180 | E | | M | 30.120 | 30.114 | 41.8 | 30.162 | 30.154 | 43.3 | 35 | 0.22 | 38.8 | 46.4 | 35.9 | 46.0 | .180 | N | | T | 30.232 | 30.226 | 42.2 | 30.140 | 30.132 | 44.2 | 37 | 0.28 | 41.8 | 48.2 | 37.0 | 46.8 | .180 | S | | W | 30.062 | 30.054 | 46.3 | 30.006 | 30.000 | 49.2 | 43 | 0.30 | 50.6 | 58.0 | 41.8 | 51.4 | .180 | SW | | T | 29.948 | 29.944 | 49.3 | 29.976 | 29.970 | 49.7 | 43 | 0.31 | 46.5 | 47.3 | 44.6 | 58.3 | .180 | NW | | F | 29.900 | 29.896 | 48.2 | 29.692 | 29.686 | 49.6 | 39 | 0.30 | 41.8 | 48.6 | 37.2 | 48.4 | .180 | NW | | S | 29.480 | 29.476 | 47.0 | 29.436 | 29.430 | 46.8 | 36 | 0.48 | 41.3 | 45.8 | 36.3 | 50.0 | .180 | NW | | O | 29.618 | 29.612 | 46.2 | 29.618 | 29.614 | 45.0 | 36 | 0.40 | 41.0 | 45.0 | 36.2 | 47.0 | .180 | W | | M | 29.610 | 29.602 | 44.0 | 29.618 | 29.612 | 45.4 | 38 | 0.28 | 41.2 | 46.4 | 39.8 | 46.0 | .180 | SW | | T | 29.222 | 29.216 | 47.8 | 29.256 | 29.250 | 49.3 | 42 | 0.37 | 50.2 | 49.4 | 41.0 | 51.7 | .180 | SSW | | W | 29.394 | 29.390 | 50.4 | 29.338 | 29.334 | 46.7 | 38 | 0.53 | 43.7 | 48.3 | 36.0 | 53.3 | .055 | NW | | T | 29.522 | 29.516 | 45.0 | 29.564 | 29.560 | 45.3 | 37 | 0.32 | 40.0 | 40.4 | 35.8 | 49.3 | .180 | NW | | F | 29.580 | 29.576 | 44.9 | 29.518 | 29.512 | 43.2 | 31 | 0.35 | 36.3 | 38.8 | 31.0 | 41.8 | .180 | NW | | S | 29.566 | 29.560 | 43.3 | 29.522 | 29.516 | 44.2 | 35 | 0.38 | 41.0 | 45.3 | 35.4 | 42.6 | .180 | NW | | O | 29.820 | 29.814 | 49.0 | 29.932 | 29.928 | 45.5 | 37 | 0.51 | 44.8 | 49.3 | 36.4 | 47.2 | .036 | WSW | | M | 30.130 | 30.124 | 42.9 | 30.122 | 30.116 | 45.8 | 35 | 0.40 | 42.7 | 51.3 | 35.2 | 50.8 | .036 | NW | | T | 30.312 | 30.304 | 45.0 | 30.310 | 30.302 | 46.2 | 38 | 0.35 | 43.9 | 53.8 | 38.4 | 51.4 | .036 | NE | | W | 30.524 | 30.518 | 48.8 | 30.508 | 30.500 | 48.3 | 40 | 0.44 | 43.8 | 52.0 | 40.0 | 54.4 | .036 | N | | T | 30.530 | 30.524 | 46.0 | 30.506 | 30.500 | 48.3 | 40 | 0.18 | 40.3 | 56.8 | 38.7 | 52.5 | .036 | NE | | F | 30.488 | 30.480 | 50.5 | 30.370 | 30.364 | 51.7 | 46 | 0.49 | 51.8 | 55.8 | 40.2 | 57.0 | .036 | NNW | | S | 30.180 | 30.172 | 49.8 | 30.134 | 30.128 | 50.7 | 43 | 0.31 | 45.8 | 43.8 | 41.8 | 56.4 | .036 | NNW | | MEAN | 29.815 | 29.809 | 46.2 | 29.801 | 29.795 | 46.3 | 38.2 | 0.29 | 42.7 | 47.6 | 38.1 | 49.2 | .929 | Sum. | ### REMARKS: - **(Lightly overcast, with light wind throughout the day. Evening, Light rain.)** - **A.M. Overcast—deposition—light wind. P.M. Overcast—light rain.** - **Overcast—light wind throughout the day, also the evening.** - **Overcast—light rain with high wind the whole of the day.** - **Overcast—light wind throughout the day. Evening, Light rain.** - **(A.M. Fine—light clouds—brick wind. P.M. Cloudy—brick wind. Evening, Fine and clear.)** - **Lightly overcast, with light wind throughout the day.** - **(A.M. Cloudy—light brick wind. P.M. Fine—light clouds and wind. Evening, Fine and clear.)** - **Fine—light clouds and wind throughout the day.** - **(Fine—light clouds and wind throughout the day. Evening, Overcast.)** - **(Fine—light clouds—high wind, with occasional hail and rain during the day.)** - **(A.M. Fine—light clouds and wind. P.M. Cloudy—light wind. Evening, Fine and clear.)** - **Overcast—light wind throughout the day. Evening, Fine and clear.** - **(A.M. Fine—light clouds—brick wind. P.M. Overcast—light snow, as also the evening.)** - **(A.M. Fine—light clouds and wind. P.M. Overcast—brick wind. Evening, Light rain.)** - **Fine—light clouds and wind throughout the day.** - **Overcast—light brick wind throughout the day.** - **(A.M. Overcast—light fog and wind. P.M. Fine—light clouds and wind. Evening, Fine and clear.)** - **(A.M. Thick fog. P.M. Fine—light clouds and wind. Evening, Fine and clear.)** - **(A.M. Overcast—light wind. P.M. Fine—light clouds and haze. Evening, Fine and slight.)** - **(A.M. Thick haze. P.M. Overcast. Evening, Cloudy.)** --- **Mean Barometer corrected ………………** - **F. 29.772 .. 29.758** - **C. 29.765 .. 29.751** --- **Mean Barometer corrected ………………** - **F. 29.739 .. 29.718** - **C. 29.732 .. 29.711** ## Meteorological Journal for May and June, 1838 | Time | Barometer Uncorrected | Att. Ther. | Barometer Uncorrected | Att. Ther. | External Thermometers | Rain in Inches | REMARKS | |--------|-----------------------|------------|-----------------------|------------|----------------------|---------------|----------| | 9 o'clock A.M. | Flint Glass | Crown Glass | Flint Glass | Crown Glass | Dew Point (°F) | Wet Ball | Dry Ball | Self-registering | Highest | Lowest | Direction of the Wind | Remarks | | 1 | 29.632 | 29.626 | 48.4 | 29.598 | 29.592 | 50.3 | 42 | 04.0 | 48.8 | 53.6 | 45.3 | 53.0 | .047 | SSE | Overcast—light wind throughout the day, with occasional rain. | | W | 29.840 | 29.834 | 65.6 | 29.800 | 29.796 | 57.4 | 48 | 06.4 | 59.3 | 63.7 | 48.3 | 61.3 | .111 | S | | | T | 29.870 | 29.864 | 56.0 | 29.838 | 29.832 | 58.4 | 50 | 05.1 | 56.7 | 61.2 | 51.7 | 64.6 | | | | F | 30.014 | 30.006 | 62.9 | 29.964 | 29.956 | 60.4 | 52 | 06.4 | 58.4 | 65.4 | 48.8 | 63.0 | | | | S | 30.136 | 30.132 | 61.8 | 30.126 | 30.122 | 66.9 | 50 | 08.0 | 58.9 | 60.7 | 49.4 | 65.6 | | | | O | 30.308 | 30.296 | 54.4 | 29.638 | 29.636 | 57.0 | 47 | 03.6 | 47.6 | 61.0 | 45.8 | 64.4 | .105 | NE | | | M | 30.328 | 30.324 | 65.4 | 30.272 | 30.264 | 52.2 | 42 | 07.0 | 54.4 | 72.8 | 42.3 | 61.4 | | | | T | 30.328 | 30.322 | 64.2 | 30.262 | 30.254 | 61.7 | 51 | 08.9 | 64.2 | 73.4 | 50.3 | 73.2 | | | | W | 30.200 | 30.198 | 75.0 | 30.122 | 30.116 | 62.4 | 50 | 10.7 | 59.9 | 68.3 | 48.8 | 73.3 | | | | T10 | 30.346 | 30.340 | 63.6 | 30.370 | 30.362 | 57.3 | 42 | 09.0 | 51.3 | 52.7 | 43.8 | 70.3 | | | | F11 | 30.394 | 30.390 | 65.6 | 30.294 | 30.288 | 55.8 | 38 | 07.9 | 49.4 | 57.0 | 38.3 | 55.3 | | | | S12 | 30.148 | 30.144 | 62.4 | 30.002 | 29.994 | 56.6 | 41 | 08.9 | 53.4 | 63.8 | 41.7 | 58.4 | | | | O13 | 29.686 | 29.678 | 54.9 | 29.638 | 29.634 | 57.0 | 44 | 04.5 | 49.7 | 49.6 | 46.2 | 63.6 | | | | M14 | 29.668 | 29.660 | 56.4 | 29.654 | 29.646 | 54.3 | 38 | 05.2 | 46.8 | 49.4 | 40.4 | 56.2 | | | | T15 | 29.764 | 29.758 | 62.8 | 29.732 | 29.728 | 52.8 | 35 | 06.6 | 45.2 | 50.8 | 36.2 | 53.6 | | | | W16 | 29.858 | 29.850 | 61.2 | 29.818 | 29.810 | 52.3 | 32 | 06.7 | 47.4 | 51.7 | 36.8 | 54.7 | | | | T17 | 29.812 | 29.804 | 50.3 | 29.770 | 29.764 | 51.4 | 37 | 05.7 | 47.3 | 55.0 | 38.9 | 52.8 | | | | F18 | 29.866 | 29.860 | 64.3 | 29.866 | 29.878 | 53.6 | 38 | 09.4 | 49.3 | 54.3 | 39.0 | 55.4 | | | | S19 | 29.826 | 29.818 | 53.0 | 29.814 | 29.806 | 53.3 | 40 | 06.6 | 50.0 | 57.7 | 40.9 | 55.2 | | | | O20 | 29.592 | 29.586 | 53.2 | 29.536 | 29.532 | 54.8 | 45 | 05.1 | 52.5 | 56.0 | 49.6 | 58.6 | | | | M21 | 29.540 | 29.532 | 61.7 | 29.576 | 29.570 | 58.3 | 46 | 07.1 | 56.7 | 60.4 | 50.2 | 60.0 | .038 | NW | | | T22 | 29.530 | 29.522 | 57.5 | 29.592 | 29.586 | 57.8 | 50 | 05.4 | 54.5 | 55.3 | 53.0 | 60.7 | | | | W23 | 29.796 | 29.788 | 58.8 | 29.810 | 29.802 | 56.9 | 45 | 08.0 | 55.0 | 56.7 | 46.8 | 59.3 | .033 | NW | | | T24 | 29.900 | 29.896 | 55.0 | 29.918 | 29.912 | 56.9 | 46 | 04.2 | 51.7 | 56.8 | 48.3 | 57.4 | .041 | NW | | | F25 | 30.012 | 30.004 | 55.7 | 29.982 | 29.976 | 57.3 | 47 | 02.7 | 49.7 | 61.2 | 46.8 | 57.7 | | | | S26 | 30.076 | 30.068 | 53.3 | 30.084 | 30.078 | 55.8 | 47 | 04.3 | 50.8 | 55.3 | 46.2 | 61.2 | | | | O27 | 29.978 | 29.970 | 58.8 | 29.864 | 29.860 | 55.5 | 44 | 06.1 | 51.4 | 56.5 | 42.6 | 59.8 | | | | M28 | 29.560 | 29.554 | 54.2 | 29.574 | 29.568 | 56.9 | 50 | 03.7 | 53.4 | 59.0 | 48.2 | 56.7 | .077 | ENE | | | T29 | 29.628 | 29.624 | 67.7 | 29.670 | 29.664 | 61.2 | 52 | 07.7 | 60.2 | 64.8 | 51.6 | 69.7 | .166 | SSE | | | W30 | 29.808 | 29.800 | 62.2 | 29.838 | 29.832 | 61.8 | 51 | 06.5 | 59.3 | 66.4 | 52.8 | 70.4 | .013 | S | | | T31 | 29.924 | 29.920 | 67.8 | 29.928 | 29.920 | 63.8 | 53 | 07.5 | 62.2 | 68.2 | 52.2 | 67.0 | | | | MEAN | 29.915 | 29.909 | 59.8 | 29.890 | 29.884 | 57.0 | 44.9 | 09.2 | 53.4 | 59.3 | 45.8 | 61.3 | .571 | | | **Mean Barometer corrected** - **9 A.M.:** 29.835 - **3 P.M.:** 29.818 - **C:** 29.827 --- **REMARKS:** - **A.M. Fine-light clouds** - **P.M. Overcast—heavy rain** - **Evening** - **Cloudy** - **Light cloud** - **Brisk wind** - **Light wind** - **Thunder storm** - **Lightning and heavy rain** --- **Barometer Corrections:** - **A.M.:** Fine-light clouds - **P.M.:** Overcast—brisk wind - **Evening:** Light wind - **Cloudy:** Light wind - **Light cloud:** Brisk wind - **Brisk wind:** Light wind - **Light wind:** Thunder storm --- **Temperature Corrections:** - **A.M.:** Fine-light clouds - **P.M.:** Overcast—brisk wind - **Evening:** Light wind - **Cloudy:** Light wind - **Light cloud:** Brisk wind - **Brisk wind:** Light wind - **Light wind:** Thunder storm --- **Wind Corrections:** - **A.M.:** Fine-light clouds - **P.M.:** Overcast—brisk wind - **Evening:** Light wind - **Cloudy:** Light wind - **Light cloud:** Brisk wind - **Brisk wind:** Light wind - **Light wind:** Thunder storm