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 | Barometer uncorrected | Att. Ther. | Dry Bulb Temp. | Wet Bulb Temp. | External Thermometers | Rain in inches at 9 A.M. | Direction of the Wind at 9 A.M. | |------|----------------------|------------|----------------|----------------|----------------------|-------------------------|--------------------------------| | S | 30.230 | 30.222 | 41.0 | 30.208 | 30.200 | 41.6 | SE | | O | 30.192 | 30.184 | 39.2 | 30.120 | 30.112 | 39.3 | Light clouds and wind throughout the day. Evening, Fine & starlight. | | M | 30.022 | 30.016 | 38.0 | 30.002 | 29.994 | 37.7 | Overcast—light rain. | | T | 29.944 | 29.936 | 34.3 | 29.982 | 29.974 | 35.3 | Fine—cloudy & wind throughout the day. Ev. Fine & starlight. | | W | 30.050 | 30.044 | 35.0 | 30.048 | 30.042 | 36.3 | Fine—clouds & wind—sharp frost throughout the day. Ev. Early part, snow—after part, starlight—sharp frost. | | T | 30.180 | 30.176 | 36.3 | 30.224 | 30.216 | 37.8 | Ev. Early part, snow—after part, starlight—sharp frost. | | F | 30.490 | 30.482 | 35.5 | 30.468 | 30.460 | 35.9 | Ev. Early part, snow—after part, starlight—sharp frost. | | S | 30.496 | 30.488 | 34.8 | 30.416 | 30.408 | 34.6 | Ev. Early part, snow—after part, starlight—sharp frost. | | O | 30.238 | 30.230 | 32.6 | 30.112 | 30.104 | 32.6 | Ev. Early part, snow—after part, starlight—sharp frost. | | M | 30.128 | 30.120 | 32.6 | 30.068 | 30.060 | 33.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 30.002 | 29.994 | 34.0 | 30.014 | 30.006 | 35.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | W | 30.066 | 30.058 | 35.0 | 30.044 | 30.036 | 36.7 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 29.872 | 29.868 | 36.0 | 29.812 | 29.804 | 36.6 | Ev. Early part, snow—after part, starlight—sharp frost. | | F | 29.514 | 29.508 | 36.3 | 29.598 | 29.590 | 38.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | S | 29.948 | 29.942 | 37.3 | 29.976 | 29.968 | 38.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | O | 29.782 | 29.774 | 37.5 | 29.770 | 29.766 | 39.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | M | 30.072 | 30.064 | 37.8 | 30.156 | 30.148 | 40.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 30.380 | 30.372 | 37.3 | 30.416 | 30.408 | 37.4 | Ev. Early part, snow—after part, starlight—sharp frost. | | W | 30.480 | 30.472 | 37.8 | 30.398 | 30.390 | 38.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 30.174 | 30.166 | 36.3 | 30.094 | 30.086 | 37.4 | Ev. Early part, snow—after part, starlight—sharp frost. | | F | 30.044 | 30.036 | 38.0 | 30.040 | 30.032 | 38.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | S | 29.880 | 29.872 | 37.5 | 29.622 | 29.614 | 37.8 | Ev. Early part, snow—after part, starlight—sharp frost. | | O | 29.240 | 29.234 | 37.3 | 29.362 | 29.356 | 38.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | M | 29.846 | 29.840 | 33.8 | 29.828 | 29.820 | 33.9 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 29.348 | 29.342 | 34.6 | 29.560 | 29.552 | 37.2 | Ev. Early part, snow—after part, starlight—sharp frost. | | W | 29.446 | 29.440 | 36.7 | 29.112 | 29.104 | 39.3 | Ev. Early part, snow—after part, starlight—sharp frost. | | T | 29.678 | 29.670 | 39.6 | 29.786 | 29.778 | 40.8 | Ev. Early part, snow—after part, starlight—sharp frost. | | F | 29.850 | 29.846 | 40.0 | 29.886 | 29.878 | 40.8 | Ev. Early part, snow—after part, starlight—sharp frost. | | S | 29.990 | 29.982 | 39.0 | 30.036 | 30.024 | 40.0 | Ev. Early part, snow—after part, starlight—sharp frost. | | O | 30.262 | 30.254 | 39.8 | 30.260 | 30.254 | 41.5 | Ev. Early part, snow—after part, starlight—sharp frost. | | M | 30.134 | 30.126 | 40.0 | 30.040 | 30.032 | 41.8 | Ev. Early part, snow—after part, starlight—sharp frost. | | MEAN.| 29.999 | 29.992 | 36.8 | 29.983 | 29.975 | 37.7 | Ev. Early part, snow—after part, starlight—sharp frost. | **REMARKS** - (Light clouds and wind throughout the day. Evening, Fine & starlight—sharp frost.) - (Light fog and wind—sharp frost throughout the day. Evening, Overcast—light rain.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Fine & starlight—sharp frost.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) - (Fine—clouds & wind—sharp frost throughout the day. Ev. Overcast—light wind—cloudy.) --- **MEAN Barometer corrected** - 9 A.M.: 29.991 - 3 P.M.: 29.991 --- **Barometer corrected** - 9 A.M.: 29.991 - 3 P.M.: 29.991 ## Meteorological Journal for March and April, 1842 | Time | Barometer Uncorrected | Att. Ther. | Barometer Uncorrected | Att. Ther. | Dew Point at 9 A.M., Fath. | Diff. of Wet and Dry Thermometers | External Thermometers | |---------------|-----------------------|------------|-----------------------|------------|---------------------------|-----------------------------------|----------------------| | | Flint Glass | Crown Glass| Flint Glass | Crown Glass| | | | | 9 o'clock A.M.| | | | | | | | | T1 | 29.230 | 29.230 | 48.0 | 29.380 | 29.372 | 50.7 | 46 | | W2 | 29.770 | 29.762 | 45.4 | 29.640 | 29.636 | 48.5 | 40 | | T3 | 29.916 | 29.908 | 50.2 | 29.906 | 29.898 | 52.2 | 47 | | F4 | 30.008 | 30.000 | 50.6 | 29.966 | 29.958 | 51.7 | 45 | | S5 | 30.042 | 30.036 | 48.3 | 30.082 | 30.074 | 50.3 | 42 | | O6 | 30.010 | 30.002 | 47.4 | 29.888 | 29.882 | 48.2 | 41 | | M7 | 29.750 | 29.742 | 45.7 | 29.642 | 29.636 | 48.8 | 40 | | T8 | 29.528 | 29.520 | 50.6 | 29.504 | 29.498 | 51.7 | 46 | | W9 | 29.660 | 29.652 | 49.5 | 29.650 | 29.644 | 49.8 | 42 | | T10 | 29.574 | 29.568 | 46.5 | 29.830 | 29.824 | 47.9 | 40 | | F11 | 30.040 | 30.032 | 46.2 | 29.900 | 29.894 | 48.5 | 40 | | O12 | 30.094 | 30.086 | 48.8 | 30.050 | 30.042 | 51.0 | 42 | | O13 | 29.940 | 29.934 | 50.2 | 30.086 | 30.082 | 51.0 | 44 | | M14 | 30.276 | 30.268 | 48.3 | 30.308 | 30.300 | 50.4 | 43 | | T15 | 30.398 | 30.392 | 50.0 | 30.384 | 30.376 | 51.5 | 46 | | W16 | 30.360 | 30.352 | 52.0 | 30.264 | 30.256 | 52.8 | 49 | | T17 | 30.188 | 30.182 | 54.2 | 30.074 | 30.066 | 54.2 | 48 | | F18 | 29.792 | 29.786 | 54.3 | 29.714 | 29.706 | 54.0 | 48 | | S19 | 29.558 | 29.552 | 52.3 | 29.420 | 29.414 | 50.3 | 40 | | O20 | 29.298 | 29.292 | 47.9 | 29.464 | 29.456 | 49.0 | 42 | | M21 | 29.890 | 29.884 | 47.8 | 30.018 | 30.010 | 47.7 | 39 | | T22 | 30.158 | 30.150 | 47.0 | 30.032 | 30.026 | 47.8 | 36 | | W23 | 30.118 | 30.114 | 49.6 | 30.130 | 30.122 | 45.0 | 35 | | T24 | 30.240 | 30.232 | 41.6 | 30.206 | 30.198 | 43.4 | 35 | | F25 | 30.128 | 30.120 | 44.8 | 29.976 | 29.968 | 47.8 | 39 | | S26 | 29.636 | 29.630 | 51.5 | 29.592 | 29.584 | 48.3 | 40 | | O27 | 29.774 | 29.766 | 47.6 | 29.782 | 29.776 | 48.0 | 40 | | M28 | 29.792 | 29.792 | 47.0 | 29.754 | 29.746 | 51.0 | 43 | | T29 | 29.912 | 29.904 | 52.3 | 29.960 | 29.952 | 53.3 | 46 | | W30 | 29.896 | 29.888 | 53.0 | 29.836 | 29.828 | 54.7 | 48 | | T31 | 29.780 | 29.774 | 51.6 | 29.592 | 29.586 | 53.2 | 47 | ### Mean Values | Time | Mean Barometer Corrected | |---------------|--------------------------| | 9 A.M. | 29.893 | | 3 P.M. | 29.886 | ### Remarks - A.M. Overcast—slight rain—light wind. P.M. Fine—light clouds. - Fine and starlight—light clouds. - Overcast—light rain—light wind throughout the day. - Evening, same. - A.M. Cloudy—brisk wind. P.M. Fine—light clouds. Ev. Cloudy. - Cloudy—light wind throughout the day. Evening, Overcast—very slight rain. - Fine—light clouds throughout the day. Evening, Fine and starlight. - Fine—nearly cloudless throughout the day. Evening, Fine and starlight. - Cloudy—light wind throughout the day. Evening, Overcast—very slight rain. - A.M. Cloudy—brisk wind—light wind throughout the day. P.M. Overcast—light rain. - Fine—light clouds. Evening, Overcast—light rain. - A.M. Light showers—brisk wind. Evening, Fine and starlight. - Evening, Overcast—light rain—high wind. - A.M. Cloudy—brisk wind—light wind throughout the day. P.M. Overcast—light rain. - Fine—light clouds. Evening, Overcast—light rain. - A.M. Light showers—brisk wind. Evening, Fine and starlight. - Evening, Overcast—light rain throughout the day. - A.M. Cloudy—brisk wind—light wind throughout the day. Evening, Overcast—very slight rain. - Fine—light clouds and wind throughout the day. Evening, Fine and starlight. - Fine—light clouds and wind throughout the day. Evening, Fine and starlight. - A.M. Fine—broken clouds—light wind—very high wind, and light rain early. P.M. Cloudy—brisk wind. Evening, Fine and starlight. - Overcast—light rain with occasional slight rain throughout the day. - Evening, Overcast—light rain early. - Overcast—light wind throughout the day—very slight rain early. - Ev. Fine and starlight. - Overcast—light wind throughout the day. Evening, Overcast—very slight rain. - Cloudy—light wind throughout the day. Ev. Overcast—light rain. - Fine—light clouds and wind throughout the day—high wind throughout the day—light rain. - Evening, Overcast—light rain. - A.M. Fine—light showers. Evening, Fine and starlight. - A.M. Fine—light showers—brisk wind. Evening, Fine and starlight. - Evening, Very slight rain. - A.M. Overcast—light wind. P.M. Cloudy—light wind. Ev. The same. - Cloudy—light wind throughout the day. Evening, Overcast. - A.M. Overcast—light showers—P.M. Fine—light clouds, with occasional shower—overcast. Evening, Overcast—very slight rain. - A.M. Overcast—rain—brisk wind. P.M. Overcast—very slight rain. Evening, Overcast—light rain and wind. --- **APRIL** | Time | Mean Barometer Corrected | |---------------|--------------------------| | 9 A.M. | 30.068 | | 3 P.M. | 30.061 | ### Remarks - A.M. Cloudy—light wind. P.M. Fine—cloudless. - Fine and starlight. - A.M. Cloudy—brisk wind. P.M. Fine—cloudless. Ev. Cloudy. - Fine—light clouds and wind throughout the day. Ev. Fine and moonlight. - A.M. Fine—light clouds and wind. P.M. Fine—cloudless. Ev. Fine and starlight. - Overcast—brisk wind throughout the day. Evening, Overcast—very slight rain. - Overcast—light wind throughout the day. Evening, Overcast. - Fine and starlight. - A.M. Fine—light clouds and wind. P.M. Fine—cloudless. Ev. Cloudy. - Fine—light clouds and wind throughout the day. Ev. Fine and moonlight. - A.M. Fine—light clouds and wind. P.M. Fine—cloudless. Ev. Cloudy. - Fine—light clouds and wind throughout the day. Ev. Fine and moonlight. - A.M. Fine—light clouds and wind. P.M. Fine—cloudless. Ev. Cloudy. - Fine—light clouds and wind throughout the day. Ev. Fine and moonlight. - Fine—nearly cloudless throughout the day. Ev. Fine and starlight. ## METEOROLOGICAL JOURNAL FOR MAY AND JUNE, 1842. ### 9 o'clock A.M. | Barometer uncorrected | Att. Ther. | Barometer uncorrected | Att. Ther. | |-----------------------|------------|-----------------------|------------| | Flint Glass | Crown Glass| Flint Glass | Crown Glass| ### 3 o'clock P.M. | Barometer uncorrected | Att. Ther. | Barometer uncorrected | Att. Ther. | |-----------------------|------------|-----------------------|------------| | Flint Glass | Crown Glass| Flint Glass | Crown Glass| ### External Thermometers | Diff. Point | Diff. of Wet & Dry | Fahrenheit | Self-registering | |-------------|--------------------|------------|------------------| | 9 A.M. | 3 P.M. | Lowest | Highest | ### REMARKS - Fine—light clouds—brisk wind throughout the day. Evening, Fine and starlight. - Fine and cloudless—brisk wind throughout the day. Evening, Fine and starlight. - A.M. Fine—cloudless—wind. P.M. Cloudy—light wind. Evening, Overcast—light rain. - A.M. Cloudy—wind. P.M. Fine—light clouds & wind. Evening, Fine and starlight. - Fine—light wind throughout the day. Evening, Fine and starlight. - Dark heavy clouds, with showers throughout the day. Evening, Overcast. - A.M. Overcast—light rain—high wind. P.M. Cloudy—brisk wind. - Evening, Overcast. - Fine—light wind, with showers throughout the day. Evening, Fine and starlight. - Thunder and lightning, with rain. - Fine—light clouds throughout the day. Evening, Fine and starlight. - Fine—light clouds and wind throughout the day. Evening, Cloudy, Overcast—light rain and wind throughout the day. Evening, Overcast. - A.M. Cloudy—light wind. P.M. Fine and cloudless. Evening, Fine and starlight. - Overcast—light wind throughout the day. Evening, Overcast. - A.M. Cloudy—light wind. P.M. Fine—light clouds and wind. Evening, Overcast. - Cloudy—light wind throughout the day. Evening, Fine and starlight. - Fine—light wind throughout the day. Evening, Fine and starlight. - Fine and starlight. - A.M. Cloudy—light wind. P.M. Overcast—slight rain. Evening, Overcast. - Cloudy—light wind throughout the day. Evening, The same. - A.M. Cloudy—high wind, with slight showers. P.M. Dark heavy clouds, Evening, Overcast—light showers. - A.M. Cloudy—wind. P.M. Fine—light clouds and wind. Evening, Cloudy. - A.M. Overcast—light rain. P.M. Fine—light clouds. Evening, Fine and moonlight. - Fine—light wind throughout the day. Evening, Fine and starlight. - Fine and cloudless—light wind—rain in the night. Evening, Fine and moonlight. - Fine—light clouds and wind throughout the day. Evening, Overcast. - Fine—light clouds and wind throughout the day. Evening, Fine and starlight. ### Mean Barometer corrected - 9 A.M.: 29.968 - 3 P.M.: 29.942 - C: 29.956 ### MEAN: - 9 A.M.: 29.958 - 3 P.M.: 29.951 - C: 29.930