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 JULY AND AUGUST, 1841. ### 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. | Fahrenheit | Self-registering | |------------|------------------| | A.M. | P.M. | ### REMARKS. - Lightly overcast—light breeze, with occasional slight rain throughout the day. - Evening, The like. - Overcast—light wind throughout the day. - Ev. Overcast—light rain. - A.M. Overt—brisk breeze, P.M.—it, clear. - Ev. Fine & moonlight. - A.M. Fine—cloudy & breezy rain, P.M. Cloudy—slight rain. - Evening, Fine and moonlight. - Lightly overcast—light wind throughout the day. - Ev. Overcast. - A.M. Cloudy—light clouds & breezy rain, P.M. Fine & starlight. - Evening, Fine and moonlight. - A.M. Fine—clouds & breeze, P.M. Lightly overcast—light rain. - Ev. Evening, Fine & starlight. - A.M. Fine—clouds & breeze, P.M. Lightly overcast—light rain. - Ev. Evening, Fine & starlight. - A.M. Fine—clouds & breeze, P.M. Overcast—light rain, P.M. Cloudy—very slight rain. - Ev. Evening, Fine & starlight. - A.M. Fine—clouds & breeze, P.M. Cloudy—very slight rain. - Ev. Evening, Fine & starlight. - A.M. Fine—clouds & breeze, P.M. Fine—light clouds & wind. - Ev. The like, with light rain and wind. - A.M. Fine—clouds & breeze, P.M. Fine—light clouds & wind. - Ev. The like, with light rain and wind. ### MEAN. | Barometer corrected | 29.883 | |--------------------|--------| | 29.876 | | | 29.869 | | | 29.862 | | | 29.854 | | | 29.848 | | | 29.842 | | | 29.836 | | | 29.830 | | ### MEAN. | Barometer corrected | 29.932 | |--------------------|--------| | 29.927 | | | 29.920 | | | 29.914 | | | 29.908 | | | 29.902 | | | 29.896 | | | 29.890 | | | 29.884 | | ### Observations for August were not taken by the Assistant Secretary, on account of absence. ## METEOROLOGICAL JOURNAL FOR SEPTEMBER AND OCTOBER, 1841. | Date | Time | Barometer uncorrected | Att. Ther. | Barometer uncorrected | Att. Ther. | External Thermometers | REMARKS | |------|------|-----------------------|------------|-----------------------|------------|----------------------|---------| | | 9 o'clock A.M. | | | | | | | | | 3 o'clock P.M. | | | | | | | | | 9 A.M. | | | | | | | | | 3 P.M. | | | | | | | | | 9 A.M. | | | | | | | | | 3 P.M. | | | | | | | ### Mean Barometer corrected - **9 A.M.:** 29.511 - **3 P.M.:** 29.503 --- ### Additional Notes: - **Mean:** 29.572 - **Sum:** 4.142 --- ### Remarks: - **NW:** A.M. Fine—light haze. P.M. Fine—light clouds. Ev. Fine & moonlight. - **E:** Fine—light clouds throughout the day. Ev. Fine and moonlight. - **SSE:** A.M. Fine—light clouds and wind. P.M. Overcast—heavy rain. - **W var.:** Evening. Heavy rain, with thunder and lightning. - **S:** P.M. Continuous rain. Evening. Fine and moonlight. - **S:** Evening. Fine and moonlight. - **S:** A.M. Cloudy—light fog. P.M. Fine—light clouds and breeze. Ev. Fine & moonlight. - **S:** A.M. Cloudy—light breeze—fog early. P.M. Overcast—light rain. - **S:** Evening. Cloudy. - **S:** Fine—cloudy—light breeze throughout the day. Evening. Fine and moonlight. - **WSW:** A.M. Light rain—high wind. Ev. Fine and clouds. - **W:** Evening. Fine and starlight. - **W:** A.M. Cloudy—light rain—early. P.M. Fine—light clouds. - **W:** Evening. Fine and starlight. - **E:** Fine—cloudy—light breeze throughout the day. Ev. Fine & starlight. - **Ditto:** Ditto. - **ENE:** Fine—light clouds & breeze throughout the day. Ev. Fine & starlight. - **S:** Fine—cloudy & breeze throughout the day. Ev. Cloudy—light rain. - **S:** A.M. Cloudy—light rain—overcast. P.M. Fine—light clouds & breeze. Ev. Overcast. - **ENE:** A.M. Overcast—light breeze. P.M. Fine—light clouds & breeze. - **SE:** A.M. Cldy.—brisk wind. P.M. Fine—light clouds. Ev. Fine & starlight. - **S:** A.M. Overcast—light steady rain—cloudy early. P.M. Fine—light clouds & breeze. Ev. Overcast. - **S:** A.M. Lightly overcast—rain during the night. P.M. Fine—light clouds & breeze. Ev. Fine & starlight. - **S:** A.M. Cldy.—light showers & wind. P.M. Showery. Ev. Fine & starlight. - **S:** Fine—light clouds & breeze, with showers. P.M. Fine—light clouds & breeze. Ev. Overcast. - **SW:** Fine—light clouds & breeze throughout the day. Ev. Overcast—high wind. - **SW:** Overcast—light rain—high wind throughout the day—the very high wind throughout the day. Ev. Overcast—high wind. - **S:** A.M. Cldy.—very h. wind, with showers, also very high throughout the day. Ev. Overcast—high wind. - **S:** A.M. Overcast—light steady rain—high wind. P.M. Dark heavy clouds—high wind. Evening. Cloudy. --- ### Additional Observations: - **OCTOBER:** - **1:** 29.516 - **17:** 29.516 - **18:** 29.704 - **19:** 29.628 - **20:** 29.926 - **21:** 29.896 - **22:** 30.170 - **23:** 29.456 - **24:** 28.944 - **25:** 29.098 - **26:** 29.352 - **27:** 29.460 - **28:** 29.642 - **29:** 29.784 - **30:** 29.838 --- ### Summary: - **Mean:** 29.572 - **Sum:** 4.142 ## Meteorological Journal for November and December, 1841 ### Barometer Uncorrected | Time | Flint Glass | Crown Glass | |------|-------------|-------------| | 9 o'clock A.M. | 29.948 | 29.940 | | 3 o'clock P.M. | 29.984 | 29.976 | ### Att. Ther. | Time | Flint Glass | Crown Glass | |------|-------------|-------------| | 9 o'clock A.M. | 50.0 | 50.7 | | 3 o'clock P.M. | 50.7 | 50.7 | ### External Thermometers | Time | Fahrenheit | Self-registering | |------|------------|------------------| | 9 A.M. | 46 | 46.5 | | 3 P.M. | 48.8 | 46.3 | ### Highest | Time | Highest | |------|---------| | 9 A.M. | 53.2 | | 3 P.M. | 53.2 | ### Lowest | Time | Lowest | |------|--------| | 9 A.M. | 46.3 | | 3 P.M. | 46.3 | ### Direction of the Wind at 9 A.M. | Time | Direction | |------|-----------| | 9 A.M. | W | ### Remarks - Overcast—slight rain and wind throughout the day. - Ev. Light fog. - Evening, The like. ### Mean Barometer Corrected | Time | Corrected | |------|-----------| | 9 A.M. | 29.739 | | 3 P.M. | 29.706 | --- **Note:** The table contains detailed meteorological data for each hour, including barometric pressure, temperature, wind direction, and weather conditions.