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 a Fixed Mark on Waterloo Bridge .............. =83 feet 2½ in. above the mean level of the Sea (presumed about) ...... =95 feet. The External Thermometer is 2 feet higher than the Barometer Cistern. Height of the Receiver of the Rain Gauge above the Court of Somerset House ............... =79 feet. The hours of observation are of Mean Time, the day beginning at Midnight. The Thermometers are graduated by Fahrenheit's Scale. The Barometer is divided into inches and decimals. | Date | Barom. A.M. | Attach. Therm. | Barom. P.M. | Attach. Therm. | Dew Point at 9 A.M. | External Thermometer | Rain, inches | Direction of Wind at 9 A.M. | Remarks | |------|-------------|----------------|-------------|----------------|-------------------|----------------------|-------------|----------------------------|---------| | W 1 | 29.850 | 46.7 | 29.906 | 48.0 | 33 | 39.7 | 43.3 | .027 | WNW | | T 2 | 30.251 | 44.9 | 30.366 | 45.5 | 32 | 38.2 | 40.7 | 36.8 | NNW | | F 3 | 30.081 | 44.4 | 29.915 | 46.5 | 40 | 44.1 | 49.3 | 35.3 | SW | | S 4 | 30.010 | 48.7 | 30.150 | 48.6 | 45 | 49.2 | 45.0 | 43.5 | WNW | | O 5 | 30.058 | 48.3 | 30.012 | 51.1 | 43 | 47.3 | 49.0 | 41.4 | WNW | | M 6 | 29.814 | 48.9 | 29.642 | 50.2 | 42 | 46.8 | 48.5 | 45.1 | WNW | | T 7 | 29.574 | 47.8 | 29.629 | 48.4 | 38 | 42.7 | 45.0 | 39.6 | WNW | | W 8 | 29.210 | 48.3 | 29.237 | 49.6 | 44 | 45.2 | 46.9 | 40.7 | WNW | | T 9 | 29.395 | 48.4 | 29.309 | 48.2 | 40 | 42.2 | 43.2 | 41.3 | WNW | | F 10 | 29.102 | 48.3 | 29.164 | 49.7 | 43 | 42.9 | 44.4 | 40.7 | WNW | | S 11 | 29.410 | 49.5 | 29.427 | 51.0 | 45 | 45.4 | 48.5 | 42.2 | WNW | | O 12 | 29.120 | 50.8 | 29.067 | 52.0 | 48 | 48.7 | 49.8 | 44.8 | WNW | | M 13 | 29.635 | 49.7 | 29.677 | 52.5 | 47 | 47.7 | 51.4 | 42.8 | WNW | | T 14 | 29.663 | 51.7 | 29.627 | 53.3 | 45 | 47.9 | 50.5 | 47.2 | WNW | | W 15 | 29.318 | 51.3 | 29.641 | 52.9 | 47 | 47.7 | 47.6 | 44.6 | WNW | | T 16 | 29.609 | 51.6 | 29.639 | 55.2 | 47 | 48.4 | 52.5 | 43.7 | WNW | | F 17 | 29.419 | 55.8 | 29.355 | 56.7 | 52 | 52.7 | 51.0 | 47.7 | WNW | | S 18 | 29.563 | 52.9 | 29.691 | 53.7 | 43 | 45.3 | 48.8 | 44.2 | WNW | | O 19 | 29.687 | 51.8 | 29.574 | 52.3 | 41 | 43.7 | 45.9 | 41.4 | WNW | | M 20 | 29.980 | 49.3 | 30.035 | 51.4 | 38 | 39.8 | 47.0 | 37.8 | WNW | | T 21 | 29.941 | 51.8 | 29.867 | 53.8 | 43 | 48.7 | 52.0 | 39.3 | WNW | | W 22 | 29.645 | 54.3 | 29.694 | 54.3 | 50 | 51.2 | 50.5 | 48.3 | WNW | | T 23 | 29.792 | 54.6 | 29.833 | 55.7 | 52 | 52.8 | 55.2 | 44.6 | WNW | | F 24 | 29.999 | 57.3 | 29.870 | 58.3 | 53 | 54.6 | 55.7 | 52.8 | WNW | | O 25 | 30.136 | 56.3 | 30.196 | 57.0 | 48 | 48.9 | 49.7 | 47.7 | WNW | | M 26 | 29.878 | 56.3 | 29.879 | 57.5 | 51 | 51.6 | 54.8 | 45.3 | WNW | | T 27 | 29.870 | 55.2 | 29.816 | 55.3 | 48 | 48.5 | 52.2 | 48.3 | WNW | | W 28 | 29.877 | 56.3 | 29.311 | 57.6 | 52 | 52.9 | 51.7 | 47.9 | WNW | | T 29 | 30.284 | 46.6 | 30.344 | 46.7 | 26 | 34.6 | 38.3 | 34.1 | WNW | | F 30 | 30.333 | 44.9 | 30.258 | 47.7 | 29 | 36.8 | 43.3 | 32.5 | WNW | | S 31 | 30.138 | 48.3 | 30.134 | 50.7 | 42 | 44.8 | 46.8 | 33.9 | WNW | **Means:** - Barom. A.M.: 29.761 - Barom. P.M.: 50.7 - Dew Point: 52.0 - Lowest: 43.6 - Highest: 49.0 - Mean: .345 **Remarks:** - A.M. Overcast—light haze, P.M. Fine—light clouds. - Lightly cloudy, P.M. Fine. - Very fine and cloudless—light haze. - Lightly cloudy—light haze. - A.M. Fine—cloudless, P.M. Lightly overcast. - Fine—light haze. - A.M. Strong haze, P.M. Lightly cloudy. - Strong haze. - A.M. Fog and light deposition, P.M. Lightly cloudy. - Lightly cloudy. - A.M. Very light rain—light fog, P.M. Fine—light clouds and haze. - A.M. Light continued rain, P.M. Fine—light clouds. - Fair—lightily cloudy—haze—Light frost from a.m. - Morning and evening haze, Noon, fine, Night, light rain. - A.M. Fog—light deposition, P.M. Lightly cloudy. - A.M. Fair—light clouds and haze, P.M. Fine and clear—light haze. - Fine and cloudless—haze—Haze frost, a.m. - Lightly cloudy and overcast—light haze. - A.M. Hazy, P.M. Fine—light clouds. - Fine—A.M. Cloudless—haze, P.M. Clear—light clouds. - Fine—A.M. Cloudless—haze, P.M. Light clouds. - Lightly cloudy and overcast. - Lightly cloudy and overcast—A.M. Light wind, P.M. Light wind. - Fine and cloudless—A.M. Haze, P.M. Clear. - A.M. Overcast—light wind and haze, P.M. Clear and cloudless. - Overcast. - Fog and light rain. *The Rain Gauge is, in every state of the weather, invariably examined every morning at 9 o'clock, and the result set down in the appropriate column; while, on the other hand, any sensible exhibition of rain is equally noticed under the Remarks on the Weather in the last column, independently of any reference to the indications of the Gauge. During the present month, the amount of rain appears to have been too small to become appreciable in the Rain Gauge employed.—J.H.* ## Meteorological Journal for March and April, 1834 ### 9 o'clock A.M. | Date | Barom. | Attach. Ther. | Barom. | Attach. Ther. | |------|--------|---------------|--------|---------------| | S | 30.468 | 51.7 | 30.414 | 54.2 | | 2 | 30.310 | 53.3 | 30.305 | 56.4 | | M | 30.406 | 51.3 | 30.337 | 54.1 | | T | 30.160 | 53.3 | 30.063 | 55.7 | | W | 29.780 | 54.7 | 29.748 | 56.2 | | F | 29.994 | 52.8 | 30.041 | 55.2 | | 7 | 30.209 | 53.6 | 30.229 | 56.3 | | S | 30.328 | 53.9 | 30.303 | 57.4 | | G | 30.484 | 54.6 | 30.464 | 57.3 | | M | 30.369 | 53.3 | 30.330 | 56.4 | | T | 30.477 | 53.2 | 30.414 | 54.9 | | W | 30.536 | 51.8 | 30.482 | 54.9 | | T | 30.426 | 52.4 | 30.380 | 53.2 | | F | 30.386 | 48.7 | 30.380 | 51.6 | | S | 30.542 | 48.7 | 30.507 | 51.3 | | G | 30.547 | 46.7 | 30.475 | 49.5 | | M | 30.485 | 47.6 | 30.483 | 48.4 | | T | 30.562 | 45.3 | 30.542 | 47.4 | | W | 30.561 | 42.2 | 30.509 | 46.5 | | T | 30.476 | 44.2 | 30.434 | 46.8 | | F | 30.427 | 43.8 | 30.360 | 46.0 | | S | 30.202 | 46.3 | 30.095 | 50.0 | | G | 30.019 | 47.9 | 29.830 | 51.7 | | M | 29.786 | 50.2 | 29.808 | 51.3 | | T | 29.882 | 46.6 | 29.940 | 47.7 | | W | 30.188 | 43.7 | 30.162 | 46.7 | | T | 30.116 | 46.8 | 30.043 | 50.3 | | F | 29.776 | 50.7 | 29.571 | 52.3 | | S | 29.683 | 50.3 | 29.679 | 52.8 | | G | 29.923 | 48.8 | 29.898 | 52.3 | | M | 29.874 | 47.7 | 29.943 | 50.8 | ### Means... | Barom. | Attach. Ther. | |--------|---------------| | 30.238 | 49.6 | | | | | | | ### External Thermometer | Date | 9 A.M. | 3 P.M. | |------|--------|--------| | S | 50.0 | 54.6 | | 2 | 50.3 | 55.3 | | M | 46.2 | 52.7 | | T | 49.3 | 50.0 | | W | 53.3 | 55.0 | | F | 45.2 | 52.7 | | 7 | 49.4 | 55.2 | | S | 50.4 | 57.6 | | G | 50.7 | 56.5 | | M | 47.8 | 56.4 | | T | 47.4 | 53.2 | | W | 45.2 | 54.6 | | T | 46.7 | 47.7 | | F | 41.8 | 50.3 | | S | 44.5 | 50.0 | | G | 40.8 | 49.5 | | M | 44.0 | 46.0 | | T | 40.3 | 43.6 | | W | 41.7 | 45.5 | | T | 40.6 | 43.7 | | F | 43.7 | 53.1 | | S | 43.7 | 53.4 | | G | 38.7 | 48.0 | | M | 39.2 | 44.8 | | T | 39.4 | 45.0 | | W | 48.8 | 49.4 | | T | 46.5 | 50.6 | | F | 43.4 | 53.3 | | S | 42.7 | 48.7 | | G | 42.7 | 48.7 | | M | 46.3 | 50.8 | ### Mean... | Barom. | Attach. Ther. | |--------|---------------| | | | ### Direction of the Wind at 9 A.M. | Date | Barom. | Attach. Ther. | |------|--------|---------------| | S | 51.7 | 54.2 | | 2 | 53.3 | 56.4 | | M | 54.1 | 55.7 | | T | 55.2 | 56.3 | | W | 54.9 | 56.2 | | F | 54.9 | 56.3 | | 7 | 54.6 | 56.0 | | S | 54.3 | 56.9 | | G | 54.5 | 56.9 | | M | 53.3 | 54.7 | | T | 53.2 | 54.7 | | W | 52.7 | 54.6 | | T | 52.7 | 54.7 | | F | 51.6 | 52.7 | | S | 51.3 | 52.3 | | G | 51.3 | 52.3 | | M | 51.3 | 52.3 | | T | 51.3 | 52.3 | ### Mean... | Barom. | Attach. Ther. | |--------|---------------| | | | ### Remarks - **Deposition—light clouds and fog.** - **SSW—Lightly cloudy and overcast.** - **SE—Overcast—light fog.** - **SSW—A.M. Fine and clear. P.M. Lightly cloudy.** - **SSW—Lowering—light brick wind.—At night, high wind.** - **WSW—Fine—A.M. Cloudless—light breeze. P.M. Light clouds.** - **WSW—Fine—light clouds.** - **WSW—Fine and clear—night clouds.** - **W—Fine—A.M. Lightly overcast. P.M. Clear—light clouds.** - **Haze—Light wind.** - **ESE—Hazy—A.M. Lightly cloudy. P.M. Strong deposition.** - **ESE—A.M. Light rain—fog. P.M. Haze.** - **N—A.M. Cloudless—light haze. P.M. Cloudy—light wind.** - **N—Light wind—A.M. Cloudy. P.M. Fine—light clouds.** - **N—Fine—A.M. Cloudless. P.M. Light clouds and wind.** - **NNE—Light haze.—A.M. Cloudy. P.M. Hazy—light wind.** - **ESE—A.M. Overcast and Hazy. P.M. Fine—light clouds.** - **E—Fog—A.M. Lightly cloudy—light wind. P.M. Nearly cloudy—less wind.** - **NNE—Lightly overcast—A.M. Haze. P.M. Light wind.** - **NW—Overcast—haze.** - **WSW—Fine—lightly cloudy.—Evening, light rain.** - **W—Lightly cloudy—light unsteady wind.** - **NNE—Fine (but calm at 3 p.m.)—A.M. Fine—cloudy. P.M. Lightly overcast.** - **NW—Fine—A.M. Cloudless. P.M. Light clouds. Evening, clear.** - **N—Fine and cloudy—light haze.** - **W—Cloudy and overcast.—Evening, light rain.** - **SSW—Overcast—light showers and unsteady wind.** - **W—Fine and nearly cloudless—light breeze.—Clear, p.m.** - **W—Fine—light haze.—light showers at intervals. A.M. Cloudless.** - **W—P.M. Cloudy.** - **W—Fine—light clouds and breeze.** ### Mean of Barometer, corrected for Capillary and reduced to 32° Fahr. | 9 A.M. | 3 P.M. | |--------|--------| | 30.186 | 30.139 | ### Mean... | Barom. | Attach. Ther. | |--------|---------------| | | | ### Mean of Barometer, corrected for Capillary and reduced to 32° Fahr. | 9 A.M. | 3 P.M. | |--------|--------| | 30.120 | 30.077 | ### Means... | Barom. | Attach. Ther. | |--------|---------------| | 30.238 | 49.6 | | | | ### Mean... | Barom. | Attach. Ther. | |--------|---------------| | | | | Date | Time | Barometer | Temperature | Dew Point | External Thermometer | Rain in inches | Wind Direction | |------|------|-----------|-------------|----------|----------------------|---------------|---------------| | 1834 | 9 A.M. | 29.677 | 58.9 | 29.744 | 62.2 | 55 | 55.4 | 60.3 | 50.9 | 61.2 | S | | | 3 P.M. | 29.924 | 62.2 | 29.875 | 62.8 | 52 | 58.1 | 62.2 | 46.7 | 63.7 | .019 | | | 9 A.M. | 29.989 | 61.7 | 29.994 | 64.9 | 52 | 59.7 | 66.5 | 51.3 | 68.4 | SW | | | 3 P.M. | 29.990 | 63.8 | 29.973 | 66.3 | 53 | 64.9 | 71.8 | 50.3 | 73.4 | S | | | 9 A.M. | 29.962 | 64.8 | 30.010 | 65.9 | 58 | 64.2 | 64.2 | 61.7 | 67.0 | .017 | | | 3 P.M. | 30.330 | 66.9 | 30.352 | 67.7 | 53 | 61.6 | 69.8 | 49.4 | 70.3 | .080 | | | 9 A.M. | 30.469 | 68.4 | 30.420 | 69.5 | 53 | 63.2 | 73.2 | 51.5 | 75.0 | WSW | | | 3 P.M. | 30.340 | 65.6 | 30.204 | 68.9 | 56 | 60.3 | 62.8 | 54.8 | 74.7 | WSW | | | 9 A.M. | 29.894 | 68.2 | 29.810 | 70.6 | 52 | 65.6 | 72.7 | 57.5 | 73.3 | WSW | | | 3 P.M. | 29.983 | 68.2 | 29.958 | 68.5 | 46 | 60.6 | 65.6 | 51.8 | 67.7 | SSE | | | 9 A.M. | 29.860 | 67.2 | 29.760 | 68.4 | 48 | 61.9 | 70.4 | 50.0 | 72.3 | SSE | | | 3 P.M. | 29.741 | 64.7 | 29.744 | 68.4 | 53 | 61.1 | 66.8 | 57.8 | 67.8 | .083 | | | 9 A.M. | 29.617 | 63.8 | 29.602 | 65.7 | 54 | 59.8 | 58.5 | 54.6 | 62.7 | .036 | | | 3 P.M. | 29.783 | 64.4 | 29.819 | 65.8 | 51 | 58.8 | 62.8 | 50.5 | 64.6 | .011 | | | 9 A.M. | 29.858 | 63.5 | 29.893 | 66.2 | 53 | 61.8 | 67.9 | 54.8 | 69.8 | ESE | | | 3 P.M. | 29.950 | 66.6 | 29.869 | 67.5 | 55 | 60.2 | 68.2 | 53.5 | 70.8 | ESE | | | 9 A.M. | 29.533 | 68.4 | 29.431 | 66.5 | 53 | 65.4 | 57.3 | 54.7 | 67.3 | SW | | | 3 P.M. | 29.454 | 67.3 | 29.499 | 65.4 | 43 | 58.8 | 59.8 | 44.7 | 62.8 | .103 | | | 9 A.M. | 29.808 | 66.4 | 29.889 | 64.9 | 44 | 60.4 | 63.4 | 46.9 | 65.8 | WSW | | | 3 P.M. | 30.329 | 66.2 | 30.350 | 64.7 | 46 | 60.0 | 68.2 | 46.0 | 69.2 | .081 | | | 9 A.M. | 30.524 | 67.7 | 29.980 | 66.2 | 48 | 62.2 | 67.0 | 50.5 | 68.7 | NNE | | | 3 P.M. | 30.461 | 66.2 | 30.372 | 64.4 | 49 | 59.6 | 63.8 | 47.3 | 64.3 | NNE | | | 9 A.M. | 30.305 | 64.7 | 30.285 | 65.4 | 53 | 63.8 | 68.2 | 49.2 | 68.2 | ENE | | | 3 P.M. | 30.388 | 67.3 | 30.378 | 67.9 | 53 | 63.7 | 70.8 | 48.3 | 70.8 | ENE | | | 9 A.M. | 30.468 | 62.4 | 30.392 | 63.2 | 42 | 58.1 | 62.0 | 49.7 | 62.0 | NNEvar. | | | 3 P.M. | 30.334 | 58.8 | 30.313 | 61.5 | 39 | 54.9 | 61.7 | 44.8 | 62.7 | NNEvar. | | | 9 A.M. | 30.301 | 62.6 | 30.239 | 62.5 | 44 | 57.9 | 66.6 | 44.4 | 66.7 | NNEvar. | | | 3 P.M. | 30.228 | 65.3 | 30.176 | 63.2 | 43 | 58.4 | 63.4 | 47.7 | 63.7 | NNEvar. | | | 9 A.M. | 30.155 | 64.6 | 30.085 | 63.0 | 40 | 56.3 | 67.0 | 43.0 | 68.5 | NNEvar. | | | 3 P.M. | 30.134 | 66.7 | 30.156 | 66.3 | 49 | 60.2 | 64.5 | 53.4 | 66.9 | NNEvar. | | | 9 A.M. | 30.278 | 67.2 | 30.239 | 65.4 | 45 | 60.2 | 66.3 | 47.3 | 68.3 | NNEvar. | **Means:** 30.067 65.2 30.026 65.8 49.6 60.6 65.9 50.5 67.7 **Sum:** .430 **Mean of Barometer, corrected for Capil. 9 A.M. 3 P.M. larity and reduced to 32° Fahr. ...... 29.967 29.924