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. | Date | Time | Temperature (°F) | Barometer (inHg) | Remarks | |------|------|-----------------|------------------|---------| | 1841 | 9 AM | 29.962 | 29.954 | Overcast—deposition—brick wind throughout the day, as also evening. | | | 3 PM | 29.910 | 29.904 | Fine—light clouds—brick wind throughout the day. Ev. Overcast. | | | 9 AM | 30.096 | 30.083 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.108 | 30.100 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.304 | 29.300 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.168 | 29.164 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.002 | 28.998 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.050 | 29.042 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.308 | 29.300 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.322 | 29.314 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.528 | 29.520 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.568 | 29.560 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.696 | 29.688 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.704 | 29.696 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 28.884 | 29.878 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.872 | 29.864 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.706 | 29.698 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.594 | 29.586 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.300 | 29.292 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.284 | 29.276 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 28.864 | 28.858 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 28.844 | 28.836 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.366 | 29.358 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.350 | 29.342 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.370 | 29.364 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.350 | 29.342 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.578 | 29.570 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.664 | 29.656 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.622 | 29.616 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.610 | 29.602 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.736 | 29.728 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.714 | 29.706 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.812 | 29.804 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.786 | 29.778 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.050 | 30.044 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.036 | 30.028 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.084 | 30.076 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.070 | 30.062 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 29.796 | 29.790 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.860 | 29.854 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.350 | 30.342 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.274 | 30.266 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.000 | 29.992 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 29.988 | 29.980 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.050 | 30.044 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.048 | 30.040 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.322 | 30.314 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.256 | 30.248 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 9 AM | 30.282 | 30.274 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | | | 3 PM | 30.204 | 30.202 | (A.M.) Overcast—light wind and snow—very high wind throughout the night & P.M. Lt. clds. & wind. Ev. Fine & starlight—sharp frost. | * On Sunday, the 3rd of January, a few minutes before 7 A.M., the wind increased much, accompanied by a very heavy shower of hail, snow, and rain, with loud thunder, and very vivid lightning. The lightning had a very purplish appearance. The storm continued for the space of twelve to fourteen minutes, after which it became perfectly calm. At 7 A.M. the barometer was much depressed, having fallen nearly an inch from the previous afternoon. It stood thus on the 2nd, at 3 P.M., F. 30.109; C. 30.100; and on the 3rd, at 7 A.M., F. 29.324; C. 29.318; and it continued falling until the following day, when at 3 P.M. it began to rise.—J. D. R. ## METEOROLOGICAL JOURNAL FOR MARCH AND APRIL, 1841. | Date | Time | Barometer | Att. Ther. | External Thermometers | Remarks | |------|------|-----------|------------|-----------------------|---------| | | 9 o'clock A.M. | Barometer uncorrected | Att. Ther. | Flint Glass | Crown Glass | Flint Glass | Crown Glass | Dew Point at 9 A.M. | Diff. of Wet and Dry | Fahrenheit | Self-registering | Rain in inches | Highest | Lowest | Mean Barometer corrected | | | 3 o'clock P.M. | Barometer uncorrected | Att. Ther. | Flint Glass | Crown Glass | Flint Glass | Crown Glass | Dew Point at 9 A.M. | Diff. of Wet and Dry | Fahrenheit | Self-registering | Rain in inches | Highest | Lowest | Mean Barometer corrected | | | 9 A.M. | 3 M.P. | 9 A.M. | 3 M.P. | | 1841 | M | 29.614 | 29.606 | 41.9 | 29.644 | 29.636 | 42.6 | 36 | 02.3 | 39.3 | 41.7 | 36.9 | 42.6 | SE | Cloudy—light wind throughout the day. Ev. Overcast—light rain. | | T | 29.688 | 29.680 | 41.9 | 29.542 | 29.536 | 43.6 | 37 | 02.5 | 37.4 | 42.4 | 35.0 | 43.2 | .025 | SW | Overcast—light rain—brick wind throughout the day. Ev. The same. | | W | 29.324 | 29.318 | 43.7 | 29.428 | 29.422 | 44.8 | 39 | 02.2 | 42.4 | 47.3 | 37.3 | 46.7 | .283 | NW | Fine—light clouds and wind. P.M. Cloudy, with occasional slight rain. Evening, Overcast. | | T | 29.912 | 29.904 | 42.3 | 29.874 | 29.868 | 43.8 | 36 | 02.7 | 36.8 | 44.7 | 35.2 | 48.3 | S | Fine—light clouds and wind throughout the day. Evening, Overcast. | | F | 29.876 | 29.870 | 44.9 | 29.616 | 29.610 | 46.6 | 40 | 02.4 | 42.0 | 45.3 | 36.2 | 45.4 | .083 | S | Fine—light clouds and wind. P.M. Overcast—light rain—brick wind. | | S | 29.764 | 29.758 | 45.7 | 29.900 | 29.896 | 47.0 | 41 | 03.4 | 43.2 | 50.4 | 40.5 | 50.3 | .158 | W | Fine—light clouds and wind throughout the day. Ev. Cloudy. | | M | 30.080 | 30.072 | 48.7 | 30.140 | 30.136 | 50.2 | 43 | 03.0 | 51.7 | 57.8 | 42.6 | 52.5 | SS | Fine—It. clouds & wind throughout the day. Ev. Fine & moonlight. | | M | 30.414 | 30.406 | 50.0 | 30.406 | 30.400 | 52.7 | 45 | 01.9 | 50.5 | 58.8 | 49.6 | 59.2 | SW | A.M. Light fog, with very slight rain. P.M. Fine—light clouds. | | T | 30.444 | 30.438 | 51.0 | 30.418 | 30.410 | 52.4 | 46 | 01.7 | 44.5 | 55.6 | 43.4 | 50.3 | SSW | A.M. Light fog. P.M. Fine—light clouds. Ev. Fine & moonlight. | | W | 30.496 | 30.484 | 50.6 | 30.454 | 30.448 | 52.8 | 45 | 02.5 | 46.7 | 57.6 | 43.3 | 56.5 | S | A.M. Light fog. P.M. Cloudy—light wind. Ev. Fine & moonlight. | | T | 30.512 | 30.504 | 49.4 | 30.450 | 30.442 | 51.3 | 44 | 02.5 | 45.2 | 58.3 | 40.0 | 58.7 | S | A.M. Light fog. P.M. Fine & cloudless. Ev. Fine & moonlight. | | F | 30.400 | 30.394 | 51.2 | 30.346 | 30.338 | 52.9 | 46 | 02.2 | 46.6 | 59.7 | 42.2 | 59.3 | E | A.M. Light fog. P.M. Fine & cloudless. Ev. Fine & starlight. | | S | 30.398 | 30.392 | 51.9 | 30.390 | 30.382 | 53.0 | 47 | 02.5 | 46.6 | 55.3 | 44.6 | 61.0 | E | A.M. Overcast—light fog. P.M. Fine—It. clouds. Ev. Fine & starlight. | | M | 30.388 | 30.380 | 47.7 | 30.296 | 30.290 | 50.0 | 45 | 01.3 | 40.2 | 52.4 | 37.7 | 56.7 | NE | A.M. Overcast—It. P.M. Fine—It. clouds. Ev. Fine & starlight. | | M | 30.176 | 30.170 | 48.5 | 30.098 | 30.092 | 52.0 | 40 | 02.0 | 42.8 | 59.7 | 39.6 | 53.7 | NE | A.M. Light fog. P.M. Fine & cloudless. Ev. Fine & starlight. | | M | 29.942 | 29.936 | 50.6 | 29.818 | 29.810 | 52.7 | 47 | 03.9 | 49.7 | 60.2 | 41.6 | 60.6 | NE | A.M. Fine—It. fog. P.M. Fine & cloudless. Ev. Fine & starlight. | | W | 29.630 | 29.624 | 52.2 | 29.604 | 29.598 | 54.0 | 49 | 02.9 | 51.3 | 54.7 | 49.2 | 61.7 | N | A.M. Fine—It. fog. P.M. Fine & cloudless. Ev. Fine & starlight. | | T | 29.444 | 29.438 | 51.6 | 29.512 | 29.506 | 53.8 | 48 | 03.5 | 51.7 | 53.0 | 46.8 | 56.7 | N | A.M. Overcast—high wind—slight rain early. P.M. Cloudy—high wind—slight rain. Ev. Fine & starlight. | | F | 29.628 | 29.622 | 51.0 | 29.636 | 29.630 | 52.5 | 48 | 04.1 | 49.7 | 51.7 | 44.2 | 56.0 | SSE | A.M. Clouds—high wind, same throughout the night. P.M. Fine—It. clds. Ev. Fine & starlight. | | S | 30.650 | 29.644 | 53.0 | 29.640 | 29.632 | 51.7 | 46 | 04.6 | 50.3 | 47.7 | 44.3 | 54.0 | .022 | E | A.M. Fine—light clouds and wind. P.M. Cloudy—brick wind. | | C | 29.672 | 29.666 | 53.2 | 29.628 | 29.622 | 52.5 | 46 | 03.5 | 49.5 | 52.5 | 43.6 | 56.4 | .133 | E | A.M. Fine—light clouds and wind. P.M. Cloudy—brick wind. | | M | 29.378 | 29.372 | 52.2 | 29.456 | 29.448 | 45.5 | 50 | 02.0 | 51.9 | 55.5 | 48.7 | 54.3 | .036 | S | A.M. Overcast—very heavy rain throughout the night. P.M. Fine—It. clds.—hail. Ev. Fine & starlight, 6 p.m., hail & rain—rainbow. | | T | 29.878 | 29.870 | 54.3 | 30.030 | 30.022 | 53.9 | 48 | 03.5 | 49.3 | 56.5 | 43.2 | 56.6 | .025 | SSW | A.M. Fine—light clouds and wind. P.M. Fine—light clouds and wind. Ev. Fine & starlight. | | W | 30.270 | 30.262 | 52.0 | 29.258 | 29.250 | 53.6 | 46 | 03.5 | 51.4 | 54.3 | 46.6 | 58.3 | SSE | Cloudy—light wind throughout the day. Evening, Fine & starlight. | | T | 30.160 | 30.152 | 54.2 | 30.044 | 30.036 | 53.9 | 45 | 03.5 | 51.8 | 57.3 | 44.3 | 55.7 | SSE | Cloudy—It. clouds & haze throughout the day. Ev. Fine and starlight. | | F | 29.728 | 29.722 | 55.0 | 29.596 | 29.590 | 56.4 | 49 | 04.8 | 55.5 | 62.3 | 47.0 | 59.0 | SSE | Cloudy—light wind throughout the day. Ev. Early part cloudy—slight rain; afterward fine & starlight. | | S | 29.778 | 29.772 | 55.6 | 29.792 | 29.784 | 55.2 | 48 | 02.6 | 51.5 | 54.6 | 45.0 | 64.2 | .036 | SSE | A.M. Fine—It. clds. P.M. Fine—It. clds., with occasional showers. Ev. Fine & starlight. | | M | 29.970 | 29.966 | 57.9 | 29.930 | 29.924 | 54.9 | 44 | 02.7 | 45.0 | 54.5 | 41.2 | 59.7 | .105 | SSE | A.M. Fine—It. clouds and wind. P.M. Overcast, as also the evening. | | M | 29.938 | 29.932 | 52.3 | 29.874 | 29.866 | 55.0 | 48 | 03.0 | 51.2 | 54.3 | 44.8 | 56.6 | W | Cloudy—It. wind throughout the day. Evening, Overcast—It. rain. | | T | 29.912 | 29.904 | 55.9 | 29.950 | 29.944 | 54.4 | 48 | 03.3 | 48.2 | 53.8 | 43.0 | 57.0 | .072 | W | A.M. High wind, and rain early, after which fine—light clouds. P.M. Cloudy—high wind. Ev. Overcast—light rain. | | W | 29.678 | 29.672 | 57.7 | 29.594 | 29.588 | 53.7 | 46 | 04.1 | 49.0 | 52.7 | 44.7 | 55.0 | .069 | W | A.M. Fine—light clouds and wind. P.M. Cloudy—light wind. Ev. Overcast—light rain. | | MEAN | 29.940 | 29.933 | 50.6 | 29.915 | 29.908 | 51.3 | 45 | 02.9 | 47.1 | 53.6 | 42.7 | 55.4 | 1.047 | | --- **REMARKS** - **Cloudy—light wind throughout the day. Ev. Overcast—light rain.** - **Overcast—light rain—brick wind throughout the day. Ev. The same.** - **Fine—light clouds and wind throughout the day. Ev. Fine and starlight.** - **A.M. Fine—light clouds and wind. P.M. Overcast—brick wind.** - **Evening, Light rain.** - **Lightly overcast—light showers and wind. P.M. Fine—light clouds and wind throughout the day. Ev. Overcast—It. rain.** - **Cloudy—light wind throughout the day. Evening, Overcast—It. rain.** - **Fine—light clouds, with occasional light showers throughout the day. Ev. Fine and starlight.** - **Cloudy—light wind throughout the day. Ev. Fine & starlight.** - **Lightly overcast—light wind, with occasional showers throughout the day. Ev. Fine & starlight.** - **The day, 23 p.m., rainbow. Ev. Fine and starlight.** - **Fine—light clouds and wind throughout the day. Evening, Overcast—very slight rain.** - **A.M. Fine—light clouds and wind, with occasional showers. P.M. Overcast—brick wind. Ev. Fine & starlight.** - **Thick haze—light wind throughout the day. Ev. Fine and starlight.** - **A.M. Lightly overcast—light wind. P.M. Fine—light clouds and wind. Ev. Evening, Overcast—light wind.** - **A.M. Light fog—brick wind throughout the day—rain early. Ev. Evening, Fine and starlight—light clouds.** - **A.M. Clouds—brick wind. Ev. Evening, Overcast—light wind—very light wind during the night. P.M. Fine—light clouds. Ev. Evening, Fine and starlight.** - **Cloudy—light wind throughout the day, as also the evening.** - **Fine—It. clouds & wind throughout the day. Ev. Fine and starlight.** - **Fine—It. clouds and wind throughout the day—rain early. Ev. Evening, Fine and starlight—light clouds.** - **A.M. Clouds—brick wind. Ev. Evening, Overcast—light wind—very light wind during the night. P.M. Fine—light clouds. Ev. Evening, Fine and starlight.** - **Cloudy—light wind throughout the day. Ev. Fine & starlight.** --- **Mean Barometer corrected** - **F. 29.869 .. 29.859** - **C. 29.879 .. 29.850** ## Meteorological Journal for May and June, 1841 ### External Thermometers | Time | Temperature (°F) | |---------------|------------------| | 9 A.M. | | | 3 P.M. | | ### Remarks - Fine—cloudy throughout the day. Evening, Fine and starlight. - Fine—light clouds throughout the day. Evening, Fine and starlight. - Fine—cloudless, light breeze throughout the day. Evening, Fine and starlight. ### Mean Barometer Corrected - 9 A.M.: 29.831 - 3 P.M.: 29.908 - C: 29.875