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 | Barometer (mm Hg) | Temperature (°C) | Barometer (mm Hg) | Temperature (°C) | Dew Point (°C) | External Thermometer | Rain (mm) | Direction of Wind | Remarks | |------|------------------|-----------------|-----------------|-----------------|-----------------|------------------|----------|------------------|---------| | July | | | | | | | | | | **REMARKS** - Light wind—A.M. Slightly lowering, P.M. Fine—light clouds. - Fluffy light clouds—A.M. Light windy, P.M. Clear. - Overcast—P.M. Fair—cloudless, A.M. Clear, P.M. Fine. - Fine—light clouds, wind—A.M. Clear, P.M. Fine, very near clear. ## METEOROLOGICAL JOURNAL FOR SEPTEMBER AND OCTOBER, 1834. | 1834 | Barom. | Attach. Therm. | Barom. | Attach. Therm. | Dew Point at 9 A.M., in degrees of Fahr. | External Thermometer | Rain in inches, Read off at 9 A.M. | Direction of the Wind at 9 A.M. | REMARKS | |------|--------|---------------|--------|----------------|-----------------------------------------|---------------------|-------------------------------|---------------------------------|---------| | M 1 | 29.942 | 64.5 | 29.950 | 67.0 | 56 | 63.2 | 63.5 | 56.9 | 67.7 | S | | T 2 | 30.041 | 65.2 | 30.061 | 66.0 | 53 | 61.3 | 66.2 | 55.6 | 67.5 | SWW | | W 3 | 30.164 | 63.6 | 30.122 | 67.2 | 56 | 61.2 | 66.0 | 53.7 | 68.4 | S var. | | T 4 | 30.099 | 66.2 | 29.998 | 68.0 | 58 | 67.7 | 71.8 | 59.9 | 72.8 | S | | F 5 | 29.930 | 66.6 | 29.942 | 70.3 | 63 | 65.4 | 69.8 | 60.9 | 72.6 | SSW | | S 6 | 30.044 | 66.8 | 30.069 | 69.3 | 56 | 62.4 | 67.0 | 56.7 | 68.7 | SW | | O 7 | 30.208 | 64.0 | 30.093 | 67.3 | 54 | 58.5 | 66.2 | 53.0 | 67.3 | SSW | | M 8 | 29.685 | 62.2 | 29.584 | 66.0 | 57 | 57.4 | 61.4 | 53.6 | 66.2 | .092 | | T 9 | 29.406 | 63.2 | 29.491 | 65.9 | 57 | 59.7 | 66.3 | 53.7 | 66.9 | ENE | | W 10 | 29.812 | 62.8 | 29.792 | 65.0 | 55 | 59.6 | 61.7 | 51.7 | 65.2 | SSW | | T 11 | 29.808 | 62.4 | 29.806 | 65.7 | 60 | 60.6 | 65.2 | 58.0 | 66.8 | SW | | F 12 | 30.138 | 62.6 | 30.210 | 65.9 | 54 | 57.1 | 65.9 | 53.2 | 66.7 | S | | S 13 | 30.499 | 60.9 | 30.491 | 63.6 | 50 | 57.2 | 63.2 | 48.0 | 64.6 | SSW | | O 14 | 30.536 | 59.6 | 30.479 | 62.3 | 49 | 55.9 | 62.7 | 46.8 | 63.6 | ESE | | M 15 | 30.380 | 58.3 | 30.267 | 61.7 | 52 | 53.7 | 63.4 | 46.2 | 64.2 | E | | T 16 | 30.047 | 59.7 | 30.008 | 62.4 | 53 | 58.9 | 68.2 | 49.9 | 68.4 | E | | O 17 | 30.037 | 62.8 | 30.063 | 66.5 | 59 | 65.6 | 72.0 | 58.5 | 73.3 | E | | T 18 | 30.218 | 65.7 | 30.225 | 67.9 | 60 | 64.6 | 70.2 | 60.7 | 71.6 | SE | | F 19 | 30.261 | 66.2 | 30.243 | 68.7 | 60 | 62.6 | 72.0 | 59.0 | 72.7 | .041 | | S 20 | 30.382 | 68.6 | 30.356 | 70.6 | 64 | 67.9 | 72.4 | 60.2 | 74.8 | S | | O 21 | 30.362 | 66.2 | 30.305 | 67.5 | 62 | 60.2 | 68.0 | 58.9 | 68.6 | N | | M 22 | 30.245 | 64.9 | 30.190 | 67.8 | 59 | 60.0 | 64.6 | 57.5 | 67.3 | NE | | T 23 | 30.235 | 61.2 | 30.208 | 63.9 | 48 | 54.3 | 59.8 | 47.2 | 61.8 | ENE | | W 24 | 30.204 | 59.6 | 30.111 | 62.5 | 47 | 55.3 | 60.3 | 50.3 | 62.4 | ENE | | T 25 | 30.212 | 59.0 | 30.162 | 62.0 | 50 | 55.9 | 62.9 | 48.8 | 63.4 | ENE | | F 26 | 30.095 | 59.9 | 30.092 | 64.4 | 55 | 58.8 | 65.0 | 54.7 | 65.3 | ENE | | S 27 | 29.876 | 62.2 | 29.920 | 64.7 | 60 | 62.3 | 65.8 | 58.8 | 66.9 | .055 | | O 28 | 30.093 | 61.9 | 30.130 | 65.2 | 57 | 58.2 | 66.2 | 54.0 | 67.0 | SSW | | M 29 | 30.285 | 60.2 | 30.229 | 63.3 | 56 | 55.3 | 63.4 | 51.0 | 63.8 | ENE | | T 30 | 30.190 | 58.2 | 30.128 | 61.6 | 53 | 54.2 | 61.3 | 46.9 | 62.3 | E | ### MEANS | 30.114 | 62.9 | 30.089 | 65.7 | 55.8 | 59.8 | 65.8 | 54.1 | 67.3 | .582 | Mean of Barometer, corrected for Capil. 9 A.M. 3 P.M. larity and reduced to 32° Fahr. …… 30.026 29.992 --- **W** Fine and cloudless.—A.M. Light haze. P.M. Light wind. **T** Fine and cloudless. A.M. Light haze and wind. P.M. Very clear. **F** A.M. Strong haze—cloudless. P.M. Fine—hazy. **S** A.M. Strong fog. P.M. Clear and cloudless. **O** A.M. Strong haze—cloudless. P.M. Fine and cloudless—light cloudiness. **M** Fine and cloudless—hazy. **T** Fine and cloudless—light streaked cloudiness—Evening, clear, light cloud. **W** Fine and cloudless—light wind. P.M. Fine and clear—light streaked cloudiness. **T** Light wind.—A.M. Light cloudy. P.M. Fine—lightest cloud. **F** Fine—light clouds and wind.—Clear, p.m. **S** Fine—A.M. Cloudless. P.M. Clear—thin flocculent clouds, and light wind. **O** Hazy—Fine—light cloudiness, p.m. Evening, local haze—clear. **M** Fine and cloudless.—Few light clouds and cloudiness, a.m. **T** Fine—soft floating clouds.—Clear, p.m.—Showers, noon and evening. **W** Fine—light flocculent clouds.—Clear—light wind, p.m. **T** Unsteady wind.—A.M. Fair & clear—light clouds. P.M. Cloudy—light wind, p.m.—Lightest wind, and almost no breeze. **F** Strong unsteady breeze.—A.M. Fine and clear. P.M. Heavy rain—dark. **S** Fine—cloudless—light brick wind—Evening, clear. **O** Lightly cloudy—A.M. Light haze. P.M. Light breeze and cloud. **M** Light clouds and breeze.—A.M. Light cloudy. Noon, showers. **T** P.M. Fair and clear. **W** Light haze—A.M.—light haze, p.m. **T** Light cloudiness—Unsteady breeze.—Ev. light rain. **F** Light brick wind—wind, p.m.—A.M. Losing deposition. **S** P.M. Fair and clear—lightly cloudy. **O** Fine—lightly thin clouds—light brick wind. **M** Fine—nearly cloudless—light wind. **T** Lightly overcast—light haze, p.m. **W** Overcast—haze. **T** Lightly cloudy—light haze and wind. **F** Fine—lightly cloudy—light cloudiness, haze, and wind. --- **MEANS** | 30.059 | 54.3 | 30.034 | 56.8 | 48.7 | 51.4 | 57.2 | 46.2 | 58.2 | .185 | Mean of Barometer, corrected for Capil. 9 A.M. 3 P.M. larity and reduced to 32° Fahr. …… 29.996 29.964 ## METEOROLOGICAL JOURNAL FOR SEPTEMBER AND OCTOBER, 1834. | Date | Barom. | Attach. Therm. | Barom. | Attach. Therm. | Dew Point 9 A.M., in degrees of Fahr. | External Thermometer | Rain in Inches, Read off at 9 A.M. | Direction of the Wind at 9 A.M. | REMARKS | |------|--------|----------------|--------|----------------|-------------------------------------|----------------------|-------------------------------|-----------------------------|---------| | 1834 | 9 o'clock, A.M. | 3 o'clock, P.M. | 9 A.M. | 3 P.M. | Lowest | Highest | Self-registering | | | M 1 | 29.942 | 64.5 | 29.950 | 67.0 | 56 | 63.2 | 63.5 | 56.9 | 67.7 | S | A.M. Cloudy. P.M. Light continued rain. | | T 2 | 30.041 | 65.2 | 30.061 | 66.0 | 53 | 61.3 | 66.2 | 55.6 | 67.5 | SWW | Fine and clear—light clouds. | | W 3 | 30.164 | 63.6 | 30.122 | 67.2 | 56 | 61.2 | 66.0 | 53.7 | 68.4 | S var. | A.M. Strong light clouds and haze. P.M. Lightly overcast—light wind. | | T 4 | 30.095 | 66.2 | 29.998 | 68.0 | 58 | 67.7 | 71.8 | 59.9 | 72.8 | S | Fine—A.M. Light broken clouds. P.M. Cloudless. | | F 5 | 29.930 | 66.6 | 29.942 | 70.3 | 63 | 65.4 | 69.8 | 60.9 | 72.6 | SSW | A.M. Overcast. P.M. Fair—cloudy—light wind. | | S 6 | 30.044 | 66.8 | 30.069 | 69.3 | 56 | 62.4 | 67.0 | 56.7 | 68.7 | SW | A.M. Fair—cloudy—light wind. P.M. Fine and cloudless. | | O 7 | 30.208 | 64.0 | 30.093 | 67.3 | 54 | 58.5 | 66.2 | 53.0 | 67.3 | SW | A.M. Hazy. P.M. Fine—nearly cloudless. | | M 8 | 29.685 | 62.2 | 29.584 | 66.0 | 57 | 57.4 | 64.4 | 53.6 | 66.2 | .092 ENE | Overcast—Light continued rain, a.m. | | T 9 | 29.406 | 63.2 | 29.491 | 65.9 | 57 | 59.7 | 66.3 | 53.7 | 66.9 | .144 SW | Overcast—Light showers. | | W 10 | 29.812 | 62.8 | 29.792 | 65.0 | 55 | 59.6 | 61.7 | 51.7 | 65.2 | SW | Overcast—Light showers. | | T 11 | 29.808 | 62.4 | 29.806 | 65.7 | 60 | 60.6 | 65.2 | 58.0 | 66.8 | S | Overcast—Light showers—Light brick wind, p.m. | | F 12 | 30.138 | 62.6 | 30.210 | 65.9 | 54 | 57.1 | 65.9 | 53.2 | 66.7 | S | Fine—light haze. | | S 13 | 30.499 | 60.9 | 30.491 | 63.6 | 50 | 57.2 | 63.2 | 48.0 | 64.6 | NE | Fine—light brick wind—A.M. Cloudless. P.M. Light clouds. | | O 14 | 30.536 | 59.6 | 30.479 | 62.3 | 49 | 55.9 | 62.7 | 46.8 | 63.6 | ESE | Fine—A.M. Light haze. P.M. Clear—light clouds. | | M 15 | 30.380 | 58.3 | 30.267 | 61.7 | 52 | 53.7 | 63.4 | 46.2 | 64.2 | E | A.M. Foggy. P.M. Fine and cloudless—light wind. | | T 16 | 30.047 | 59.7 | 30.008 | 62.4 | 53 | 58.9 | 68.2 | 49.9 | 68.4 | E | Fine and cloudless—light wind and haze. | | O 17 | 30.037 | 62.8 | 30.063 | 66.5 | 59 | 65.6 | 72.0 | 58.5 | 73.3 | E | A.M. Light fog—P.M. Fine—nearly cloudless. | | T 18 | 30.218 | 65.7 | 30.225 | 67.9 | 60 | 64.6 | 70.2 | 60.7 | 71.6 | SE | Lightly overcast—light rain. | | F 19 | 30.261 | 66.2 | 30.243 | 68.7 | 60 | 62.6 | 72.0 | 59.0 | 72.7 | .041 S | A.M. Foggy. P.M. Cloudy. | | S 20 | 30.382 | 68.6 | 30.356 | 70.6 | 64 | 67.9 | 72.4 | 60.2 | 74.8 | N | Fine and cloudless—light haze and wind. | | O 21 | 30.362 | 66.2 | 30.305 | 67.5 | 62 | 60.2 | 68.0 | 58.9 | 68.6 | NE | Lightly overcast and hazy—light wind. | | M 22 | 30.245 | 64.9 | 30.190 | 67.8 | 59 | 60.0 | 64.6 | 57.5 | 67.3 | NE | Heavy clouds—light wind. | | T 23 | 30.235 | 62.1 | 30.208 | 63.9 | 48 | 54.3 | 59.8 | 47.2 | 61.8 | ENE | Fine—A.M. Cloudless—light haze and wind. P.M. Lightly cloudy. | | W 24 | 30.204 | 59.6 | 30.111 | 62.5 | 47 | 55.3 | 60.3 | 50.3 | 62.4 | ENE | Overcast and foggy. | | T 25 | 30.212 | 59.0 | 30.162 | 62.0 | 50 | 55.9 | 62.9 | 48.8 | 63.4 | ENE | Fine—light wind—A.M. Light clouds. P.M. Cloudless. | | F 26 | 30.095 | 59.9 | 30.029 | 64.4 | 55 | 58.8 | 65.0 | 54.7 | 65.3 | SSW | Lightly overcast and cloudy—Light rain and wind, a.m. | | S 27 | 29.876 | 62.2 | 29.920 | 64.7 | 60 | 62.3 | 65.8 | 58.8 | 66.9 | .055 SW | Overcast—Light rain, p.m. | | O 28 | 30.093 | 61.9 | 30.136 | 65.2 | 57 | 58.2 | 66.2 | 54.0 | 67.0 | .092 SW | Lightly cloudy—Fine, p.m. | | M 29 | 30.285 | 60.2 | 30.229 | 63.3 | 56 | 55.3 | 63.4 | 51.0 | 63.8 | ENE | A.M. Foggy—light wind. P.M. Fine—nearly cloudless. | | T 30 | 30.190 | 58.2 | 30.128 | 61.6 | 53 | 54.2 | 61.3 | 46.9 | 62.3 | E | Fine and cloudless. | ### MEANS... | Date | Barom. | Attach. Therm. | Barom. | Attach. Therm. | Dew Point 9 A.M., in degrees of Fahr. | External Thermometer | Rain in Inches, Read off at 9 A.M. | Direction of the Wind at 9 A.M. | REMARKS | |------|--------|----------------|--------|----------------|-------------------------------------|----------------------|-------------------------------|-----------------------------|---------| | 1834 | 30.114 | 62.9 | 30.089 | 65.7 | 55.8 | 59.8 | 65.8 | 54.1 | 67.3 | .582 | Mean of Barometer, corrected for Capitol, 9 A.M. 3 P.M. | ### MEAN OF BAROMETER, CORRECTED FOR CAPITOL, 9 A.M. 3 P.M. | Date | Barom. | Attach. Therm. | Barom. | Attach. Therm. | Dew Point 9 A.M., in degrees of Fahr. | External Thermometer | Rain in Inches, Read off at 9 A.M. | Direction of the Wind at 9 A.M. | REMARKS | |------|--------|----------------|--------|----------------|-------------------------------------|----------------------|-------------------------------|-----------------------------|---------| | 1834 | 30.059 | 54.3 | 30.034 | 56.8 | 48.7 | 51.4 | 57.2 | 46.2 | 58.2 | .185 | Mean of Barometer, corrected for Capitol, 9 A.M. 3 P.M. | --- **Legend:** - **N**: Fine and cloudless—A.M. Light haze. P.M. Light wind. - **NE**: Fine and cloudless—A.M. Light haze and wind. P.M. Very clear. - **E**: A.M. Strong haze—cloudless. P.M. Fine—hazy. - **SE**: A.M. Strong fog. P.M. Clear and cloudless. - **S**: A.M. Strong haze—cloudless. P.M. Fine and cloudless—light cloudiness. - **SW**: Fine and cloudless—hazy. - **W**: Fine and cloudless—light streaked cloudiness—Evening, clear. - **WSW**: Fine and cloudless—light wind. P.M. Fine and clear—light unsteady wind. - **SSW**: Light wind—A.M. Lightly cloudy. P.M. Fine—light soft clouds. - **SW**: Fine—light clouds and wind—Clear, p.m. - **NW**: A.M. Cloudless. P.M. Clear—thin flocculent clouds, and light wind. - **WSW**: Fine and cloudless—light haze. P.M. Evening, local haze—clear. - **SSW**: Fine and cloudless—few light clouds and cloudiness, a.m. - **SSW**: Fine and cloudless—light haze. P.M. Noon, showers, and wind—clear. - **WSW**: Fine—light flocculent clouds—Clear—light wind. - **WSW**: Unsteady wind—A.M. Fair & clear—light cloud. P.M. Cloudy—light wind, and wind—unsteady breeze. - **WSW**: Strong unsteady breeze. P.M. Fair and clear. P.M. Heavy rain—dark. - **WSW**: Fine and cloudless—light brick wind—Evening, clear. - **WSW**: Lightly cloudy—cloudless—light brick wind. P.M. Fair—lightly cloudy. - **WSW**: Light clouds and breeze—A.M. Lightly cloudy. Noon, showers, and wind—clear. - **WSW**: A.M. Fair and clear. P.M. Lightly cloudy—light wind. - **WSW**: Light clouds and breeze—A.M. Lightly cloudy. Noon, showers, and wind—clear. - **WSW**: Lightly cloudy—light haze. P.M. Fair—lightly cloudy. - **WSW**: Lightly cloudy—light unsteady breeze—Ev. light rain. - **WSW**: P.M. Fair and clear—lightly cloudy. - **WSW**: Lightly cloudy—A.M. Fine and cloudless. P.M. Lightly cloudy, Evening, clear. - **WSW**: Fine—light thin clouds—light brick wind. - **WSW**: Fine—nearly cloudless—light wind. - **WSW**: Lightly overcast and cloudy—light haze. - **WSW**: Lightly overcast—light wind. - **WSW**: Lightly cloudy—light haze and wind. - **WSW**: Fine—lightly cloudy—light cloudiness, haze, and wind.