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. MDCCCXXX. ## METEOROLOGICAL JOURNAL FOR JULY, 1829. | 1829. July | 9 o'clock, A.M. | 3 o'clock, P.M. | 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 | |------------|-----------------|-----------------|----------------------------------------|-----------------------|-------------------------------------|-------------------------------|---------| | | Barom. Attach. Therm. | Barom. Attach. Therm. | Fahrenheit. Self-registering. Lowest. Highest. | | | | | | ☉ 1 | 29.647 | 65.3 | 29.513 | 66.9 | 55 | 59.7 | 61.8 | 57.6 | 65.5 | 0.292 | SSE | Overcast—rain. | | ☉ 2 | 29.587 | 73.5 | 29.621 | 68.7 | 51 | 64.6 | 66.7 | 55.7 | 68.7 | 0.097 | SSW | Fine and clear—brisk wind. | | ☉ 3 | 29.609 | 67.8 | 29.477 | 67.7 | 56 | 64.5 | 62.8 | 57.0 | 67.8 | SSE | Cloudy—showery. Rain, with high wind, at night. | | ☉ 4 | 29.631 | 73.5 | 29.573 | 67.8 | 50 | 63.5 | 58.7 | 52.8 | 63.6 | 0.036 | WSW | A.M. Fine and clear. P.M. Overcast. | | ☉ 5 | 29.585 | 63.1 | 29.660 | 67.1 | 51 | 58.4 | 60.7 | 50.7 | 66.7 | 0.089 | W | Cloudy. Evening fine and clear. | | ☉ 6 | 29.876 | 69.7 | 29.893 | 69.3 | 55 | 66.0 | 69.7 | 52.8 | 71.7 | 0.125 | W | Fine and clear—light wind. | | ☉ 7 | 29.878 | 65.7 | 29.741 | 65.9 | 60 | 60.7 | 60.7 | 55.8 | 67.7 | 0.042 | WSW | Overcast—brisk wind. Rain. | | ☉ 8 | 29.834 | 70.3 | 29.786 | 70.7 | 55 | 67.3 | 69.3 | 55.8 | 71.7 | 0.044 | NW | Fine—light clouds. | | ☉ 9 | 29.741 | 67.7 | 29.809 | 68.3 | 51 | 63.2 | 65.7 | 56.7 | 67.7 | SW | Fine—cloudy. | | ☉ 10 | 29.913 | 70.6 | 29.817 | 70.2 | 50 | 66.7 | 65.0 | 53.4 | 68.8 | SSE | A.M. Fine. P.M. Lowering. Evening, rain. | | ☉ 11 | 29.556 | 66.4 | 29.485 | 67.1 | 61 | 62.3 | 61.6 | 58.9 | 65.8 | 0.022 | SSE | Lowering. P.M. Heavy rain. | | ☉ 12 | 29.422 | 67.7 | 29.497 | 69.0 | 62 | 63.7 | 68.0 | 56.7 | 69.2 | 0.514 | WSW | Fine and clear—cloudy. | | ☉ 13 | 29.658 | 66.3 | 29.733 | 70.3 | 60 | 63.7 | 68.5 | 56.4 | 69.5 | 0.100 | SSW | Lowering. | | ☉ 14 | 29.889 | 69.2 | 29.861 | 70.3 | 66 | 66.4 | 68.7 | 62.8 | 73.7 | SSW | Cloudy. Heavy rain A.M. | | ☉ 15 | 30.014 | 74.6 | 29.982 | 73.0 | 60 | 68.7 | 73.5 | 58.3 | 74.7 | 0.125 | W | Fine and clear—light clouds. | | ☉ 16 | 29.947 | 74.3 | 29.958 | 72.9 | 56 | 66.9 | 69.5 | 57.8 | 73.2 | W | Fine. Heavy showers P.M. | | ☉ 17 | 29.910 | 68.3 | 29.683 | 68.0 | 60 | 64.1 | 60.3 | 56.4 | 64.8 | 0.125 | SSE | Lowering—light wind. Rain P.M. | | ☉ 18 | 29.562 | 68.7 | 29.589 | 70.3 | 64 | 64.3 | 66.7 | 59.7 | 69.8 | 0.239 | SE | A.M. Lowering—heavy showers. P.M. Fine. | | ☉ 19 | 29.785 | 70.2 | 29.867 | 71.7 | 60 | 65.9 | 66.4 | 59.8 | 70.2 | 0.322 | NW | Fine—lightly cloudy. | | ☉ 20 | 30.097 | 73.0 | 30.088 | 71.3 | 54 | 66.3 | 70.6 | 51.7 | 71.1 | 0.047 | NW | Fine and clear. | | ☉ 21 | 30.254 | 72.3 | 30.238 | 71.6 | 57 | 66.9 | 73.8 | 54.0 | 74.7 | WSW | Fine—light clouds. | | ☉ 22 | 30.260 | 74.3 | 30.205 | 73.7 | 62 | 69.8 | 76.2 | 59.3 | 78.3 | W | Fine and clear—cloudy. | | ☉ 23 | 30.187 | 68.7 | 30.153 | 72.4 | 62 | 63.7 | 71.4 | 60.7 | 73.3 | W | A.M. Overcast. P.M. Fine. | | ☉ 24 | 30.030 | 75.2 | 29.954 | 74.3 | 66 | 68.0 | 71.7 | 59.3 | 72.0 | E | Fine—cloudy. | | ☉ 25 | 29.873 | 70.6 | 29.897 | 74.5 | 65 | 65.8 | 74.6 | 64.2 | 75.4 | 0.183 | WSW | A.M. Thunder and lightning, from 1h to 2h, with hail and rain. | | ☉ 26 | 30.028 | 65.3 | 30.060 | 65.6 | 57 | 57.8 | 58.9 | 56.0 | 60.6 | N | Overcast. Shower at noon. | | ☉ 27 | 30.101 | 65.1 | 30.102 | 66.9 | 56 | 59.3 | 64.0 | 48.7 | 63.8 | 0.008 | NNE | Fine—light clouds. | | ☉ 28 | 30.098 | 70.7 | 29.999 | 67.7 | 51 | 66.3 | 67.9 | 51.7 | 70.3 | WSW | Fine and clear. | | ☉ 29 | 29.642 | 64.2 | 29.664 | 68.0 | 59 | 60.1 | 69.2 | 58.4 | 69.7 | 0.153 | SE | A.M. Showers, early. Fine—cloudy. | | ☉ 30 | 29.748 | 69.6 | 29.755 | 69.3 | 53 | 64.3 | 67.7 | 51.5 | 69.7 | NNE | Fine—light clouds. Thunder and lightning at 4 P.M. with heavy rain. | | ☉ 31 | 29.977 | 60.7 | 30.070 | 66.7 | 58 | 58.5 | 64.0 | 52.3 | 65.3 | 0.347 | NNW | A.M. Cloudy. P.M. Clear—brisk wind. | ### Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Sum | |------|------|------|------|------|------|------|------|-----| | 29.850 | 69.1 | 29.830 | 69.6 | 57.5 | 64.1 | 66.9 | 56.2 | 69.8 | 2.910 | ### 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 0 in. 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. ## METEOROLOGICAL JOURNAL FOR AUGUST, 1829. | 1829. August | 9 o'clock, A.M. | 3 o'clock, P.M. | 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 | |--------------|-----------------|-----------------|----------------------------------------|---------------------|-----------------------------------|-----------------------------|---------| | | Barom. Attach. Therm. | Barom. Attach. Therm. | Fahrenheit. Self-registering. Lowest. Highest. | 9 A.M. 3 P.M. | | | | h 1 | 30.248 67.5 | 30.242 67.6 | 63 63.3 66.0 51.3 68.7 | NNW | A.M. Fine and clear. P.M. Lowering distant thunder. Fine and clear—light clouds and wind. | | ⊙ 2 | 30.289 66.7 | 30.262 68.7 | 57 65.7 72.7 54.3 73.7 | W | Rain—light brisk wind. | | ⊙ 3 | 30.122 66.8 | 29.965 66.7 | 59 65.5 63.0 57.7 67.7 | SW var. | Cloudy—brisk wind. Showery P.M. Fine—light clouds and breeze. P.M. | | ⊙ 4 | 29.826 67.8 | 29.791 66.8 | 55 61.0 62.6 50.7 64.4 | 0.183 | NNW | Cloudy. Lowering. | | ⊙ 5 | 29.912 63.7 | 30.010 66.7 | 57 61.8 65.9 53.8 65.8 | 0.039 | W | A.M. Light rain, early. P.M. Fine. | | ⊙ 6 | 30.078 64.0 | 30.070 68.2 | 60 62.7 66.7 54.3 69.4 | W | Fine and clear—light clouds. | | ⊙ 7 | 30.184 64.7 | 30.207 65.9 | 61 61.7 70.6 60.3 71.7 | E | A.M. Cloudy. P.M. Clear—light clouds. Breeze. | | ⊙ 8 | 30.240 68.4 | 30.188 71.4 | 64 67.0 76.5 58.7 76.5 | E | A.M. Heavy rain, early. P.M. Fine and clear. | | ⊙ 9 | 30.115 67.4 | 30.041 71.2 | 66 66.3 71.2 57.6 71.7 | SSW | Fine—light clouds. | | ⊙ 10 | 29.935 66.2 | 29.921 69.3 | 60 60.7 69.3 60.5 70.2 | 0.406 | W | Fine and clear—light wind. | | ⊙ 11 | 30.123 64.7 | 30.144 67.4 | 53 61.7 67.7 54.8 69.3 | 0.112 | W | A.M. Fine. P.M. Lowering. Light wind. | | ⊙ 12 | 30.137 65.8 | 30.065 69.4 | 61 65.7 70.7 58.3 71.8 | S | Cloudy—heavy rain. | | ⊙ 13 | 29.778 66.3 | 29.728 69.7 | 66 66.2 67.3 61.4 72.8 | SSW | Fine and clear—cloudy. Brisk wind. | | ⊙ 14 | 29.505 65.7 | 29.452 68.2 | 64 64.4 68.2 61.3 69.8 | SE | A.M. Fine & cloudless. P.M. Broken clouds. | | ⊙ 15 | 29.577 60.8 | 29.628 61.8 | 56 56.5 57.8 53.3 60.4 | 0.180 | W var. | Overcast—rain. Light wind. | | ⊙ 16 | 29.967 58.7 | 30.053 61.7 | 54 57.6 61.0 51.0 62.6 | 0.292 | NNW | Fine and clear—cloudy. Showery P.M. | | ⊙ 17 | 30.180 56.8 | 30.155 63.7 | 51 57.0 65.3 46.7 66.4 | W | Fine and clear—cloudy. | | ⊙ 18 | 29.847 59.3 | 29.753 62.7 | 58 58.3 62.4 55.4 61.3 | 0.092 | SSW | Fine and clear—cloudy. Evening clear. | | ⊙ 19 | 29.526 63.7 | 29.476 65.3 | 60 63.7 66.3 58.0 67.3 | 0.147 | WSW | Fine and clear—brisk wind. | | ⊙ 20 | 29.284 60.7 | 29.500 62.7 | 59 59.7 61.3 55.7 63.3 | 0.083 | SSW | Fine and clear—brisk wind. | | ⊙ 21 | 29.841 60.0 | 29.902 62.3 | 52 63.3 62.6 51.8 63.3 | 0.114 | NNW | Fine—light clouds. | | ⊙ 22 | 29.924 58.7 | 29.791 62.3 | 53 59.3 61.4 52.2 63.4 | S | Cloudy. At night, strong high wind with heavy rain. | | ⊙ 23 | 29.514 63.8 | 29.504 67.5 | 63 63.0 66.2 59.5 68.3 | 0.286 | SSW | Cloudy—brisk wind. Rain A.M. | | ⊙ 24 | 29.347 63.3 | 29.525 63.6 | 59 60.4 62.7 59.3 62.9 | 0.128 | W | Lightly cloudy and showery. | | ⊙ 25 | 29.922 58.7 | 29.999 62.3 | 52 58.0 62.5 49.7 63.4 | 0.161 | WSW | Fine and clear—brisk wind. | | ⊙ 26 | 30.060 59.6 | 29.914 62.6 | 57 59.3 61.2 51.3 62.7 | S | Cloudy. At night, strong wind. | | ⊙ 27 | 29.626 62.4 | 29.560 63.3 | 48 60.4 60.9 57.8 65.7 | 0.008 | WSW | Fine and clear. Evening, brisk wind. | | ⊙ 28 | 29.521 58.4 | 29.650 61.6 | 56 58.4 60.3 53.8 61.0 | 0.272 | NW | Light clouds and brisk wind. At night, rain and strong wind. | | ⊙ 29 | 29.918 60.0 | 30.499 64.3 | 59 59.0 64.0 54.7 64.2 | 0.125 | N | Clear—light clouds—strong brisk wind. | | ⊙ 30 | 30.193 57.2 | 30.173 61.0 | 52 55.7 61.3 52.3 62.3 | NNW | Fine and clear—light wind. | | ⊙ 31 | 30.100 56.7 | 30.068 60.7 | 56 56.3 59.7 53.3 60.7 | NNW | Cloudy—light wind. | **Mean** | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Sum | |------|------|------|------|------|------|------|------|-----| | 29.898 | 62.7 | 29.911 | 65.5 | 57.8 | 61.3 | 65.0 | 55.2 | 66.6 | 2.839 | Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. ................. { 9 A.M. 3 P.M. } { 29.823 29.828 } ### 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 0 in. 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. ## METEOROLOGICAL JOURNAL FOR SEPTEMBER, 1829. | 1829, Septemb. | 9 o'clock, A.M. | 3 o'clock, P.M. | 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. | |----------------|-----------------|-----------------|----------------------------------------|-----------------------|-----------------------------------|-----------------------------|----------| | | Barom. Attach. Therm. | Barom. Attach. Therm. | Fahrenheit | Self-registering. | Lowest. Highest. | SSE | NNE | | 1 | 29.998 | 58.3 | 29.965 | 64.0 | 57 | 57.4 | 63.5 | 54.3 | 64.2 | 0.044 | Cloudy—light wind. Evening, light rain. | | 2 | 29.955 | 60.6 | 29.980 | 65.6 | 59 | 59.7 | 63.8 | 56.4 | 66.5 | 0.008 | Cloudy and foggy. Evening clear. | | 3 | 30.176 | 57.4 | 30.510 | 61.3 | 49 | 55.3 | 62.4 | 52.2 | 63.2 | NW | Fine and clear—lightly cloudy. | | 4 | 30.009 | 58.0 | 29.945 | 61.7 | 50 | 56.6 | 62.0 | 53.6 | 63.3 | W | Fine and clear—cloudy. | | 5 | 29.712 | 58.2 | 29.581 | 62.0 | 56 | 58.3 | 60.3 | 51.9 | 63.5 | SSE | Overcast—light wind. At night, light rain. | | 6 | 29.531 | 61.7 | 29.499 | 63.8 | 59 | 60.8 | 63.3 | 54.8 | 65.2 | 0.005 | Fine—lightly overcast. | | 7 | 29.663 | 59.8 | 29.658 | 64.3 | 54 | 58.5 | 63.7 | 52.3 | 64.3 | S | Fine and clear—light clouds. Showery P.M. | | 8 | 29.496 | 61.3 | 29.563 | 63.4 | 59 | 61.3 | 60.7 | 54.4 | 65.2 | S var. | Heavy rain, early A.M. Fine and clear—brisk wind. | | 9 | 29.671 | 59.7 | 29.682 | 64.2 | 55 | 58.7 | 64.2 | 52.7 | 65.5 | 0.389? | Fine and clear—light wind. | | 10 | 29.387 | 62.7 | 29.357 | 66.5 | 61 | 62.0 | 66.7 | 58.8 | 66.7 | SE | A.M. Cloudy. P.M. Fine and clear. | | 11 | 29.606 | 60.0 | 29.689 | 64.6 | 55 | 59.4 | 62.8 | 55.4 | 65.2 | WSW | Light brisk wind. | | 12 | 29.663 | 59.2 | 29.630 | 63.3 | 54 | 57.3 | 60.3 | 50.3 | 63.7 | 0.203 | Fine and clear—cloudy. Light showers. | | 13 | 29.565 | 56.0 | 29.442 | 62.4 | 53 | 55.7 | 61.4 | 47.5 | 62.7 | 0.011 | Fine and clear. Heavy rain at night. | | 14 | 29.208 | 57.3 | 29.300 | 61.6 | 48 | 54.4 | 56.6 | 52.4 | 61.6 | W | A.M. Fine. P.M. Showery. | | 15 | 29.668 | 53.7 | 29.765 | 60.4 | 45 | 53.0 | 59.1 | 44.9 | 61.3 | 0.050 | Very clear. P.M. Showery: at 4h. thunder and lightning. | | 16 | 29.561 | 54.7 | 29.535 | 57.2 | 52 | 52.5 | 54.7 | 49.5 | 54.7 | 0.408 | Foggy. Light brisk wind. | | 17 | 29.868 | 55.3 | 29.807 | 59.2 | 50 | 50.6 | 57.9 | 44.8 | 58.3 | 0.033 | Overcast. At night, rain. | | 18 | 29.175 | 56.7 | 29.161 | 61.2 | 56 | 56.7 | 59.7 | 45.0 | 63.8 | 0.389 | Fine—lightly cloudy. | | 19 | 29.472 | 56.7 | 29.631 | 56.8 | 54 | 54.5 | 55.2 | 51.7 | 56.7 | NW | Overcast. | | 20 | 29.929 | 55.9 | 29.898 | 58.7 | 51 | 51.7 | 58.4 | 45.7 | 58.8 | 0.089 | Fine—light clouds. | | 21 | 29.761 | 56.7 | 29.798 | 61.3 | 54 | 56.4 | 61.0 | 51.4 | 62.3 | 0.011 | Fine and clear—light clouds. | | 22 | 29.880 | 55.7 | 29.812 | 60.5 | 53 | 55.7 | 60.0 | 48.4 | 61.4 | 0.056 | Fine—lightly cloudy. | | 23 | 29.834 | 56.7 | 29.844 | 60.6 | 53 | 53.9 | 59.4 | 51.2 | 62.7 | 0.019 | Fine—hazy. | | 24 | 29.957 | 55.7 | 29.913 | 59.6 | 51 | 53.7 | 58.2 | 51.6 | 59.7 | WSW | A.M. Strong haze. P.M. Fine. | | 25 | 30.125 | 53.7 | 30.146 | 58.7 | 53 | 52.7 | 58.4 | 48.3 | 58.8 | N | Fine. Strong fog at night. | | 26 | 30.232 | 51.6 | 30.168 | 59.4 | 49 | 51.2 | 59.3 | 46.2 | 62.0 | N | Strong haze. | | 27 | 29.892 | 60.7 | 29.797 | 61.3 | 58 | 61.8 | 60.3 | 50.4 | 62.0 | WSW | Fine and clear—light wind. Showers at noon. | | 28 | 29.876 | 52.9 | 29.873 | 58.0 | 46 | 51.4 | 54.2 | 46.3 | 56.7 | 0.044 | Fine—light clouds. | | 29 | 29.983 | 51.0 | 29.986 | 54.6 | 42 | 48.6 | 54.0 | 44.3 | 54.3 | N | Fine—light clouds. | | 30 | 30.213 | 50.2 | 30.212 | 54.8 | 43 | 44.3 | 54.2 | 42.4 | 54.3 | N | A.M. Strong fog. P.M. Fine & clear. | Mean Mean Mean Mean Mean Mean Mean Mean Mean Sum Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. ............... { 9 A.M. 3 P.M. } { 29.709 29.702 } ### 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 0 in. 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. ## METEOROLOGICAL JOURNAL FOR OCTOBER, 1829. | 1829. October | 9 o'clock, A.M. | 3 o'clock P.M. | 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 | |---------------|-----------------|-----------------|--------------------------------------|---------------------|-----------------------------------|-------------------------------|---------| | | Barom. Attach. Ther. | Barom. Attach. Ther. | Fahrenheit | Self-registering | Lowest | Highest | | | | 1/4 1 | 30.252 52.0 | 30.220 58.8 | 51 | 53.0 | 59.6 | 43.6 | 59.7 | ENE | Fine—light brisk wind. | | 2/4 2 | 30.040 56.7 | 29.966 58.6 | 53 | 57.4 | 57.8 | 51.9 | 58.8 | E | Overcast—showery. Brisk wind A.M. | | 3/4 3 | 29.840 58.9 | 29.788 58.6 | 55 | 58.8 | 56.8 | 54.3 | 58.8 | SSW | Overcast. Heavy showers P.M. | | 4/4 4 | 29.968 53.6 | 29.951 58.4 | 52 | 53.0 | 57.7 | 47.7 | 58.3 | W | A.M. Fine. P.M. overcast. | | 5/4 5 | 29.571 56.7 | 29.570 59.1 | 54 | 54.8 | 56.8 | 52.7 | 59.4 | W | A.M. Rain. P.M. Fine. | | 6/4 6 | 29.670 51.4 | 29.675 54.2 | 46 | 50.2 | 52.5 | 44.6 | 53.4 | NW | Fine—light haze. | | 7/4 7 | 29.509 49.0 | 29.443 40.2 | 38 | 46.5 | 37.4 | 42.3 | 46.5 | W | Overcast. Rain and snow P.M. | | 8/4 8 | 29.808 43.8 | 29.921 46.9 | 27 | 39.5 | 47.5 | 33.3 | 47.5 | W | Fine and cloudless. A.M. Strong wind early. | | 9/4 9 | 30.203 41.8 | 30.229 47.5 | 31 | 40.3 | 47.0 | 34.3 | 47.0 | NW | Fine and cloudless—hazy. | | 10/4 10 | 30.432 44.0 | 30.428 50.4 | 41 | 43.7 | 54.7 | 35.7 | 56.0 | WSW | Overcast and hazy. | | 11/4 11 | 30.317 51.7 | 30.211 55.1 | 49 | 52.6 | 57.7 | 43.0 | 57.7 | W | Cloudy—light wind. | | 12/4 12 | 30.152 54.7 | 30.138 56.2 | 48 | 54.7 | 56.2 | 52.2 | 56.3 | NW | A.M. Cloudy. P.M. Fine. | | 13/4 13 | 30.039 55.2 | 29.873 57.2 | 49 | 55.4 | 56.8 | 50.3 | 57.5 | SW | Lightly cloudy. | | 14/4 14 | 29.420 56.7 | 29.578 51.0 | 51 | 52.8 | 48.8 | 52.3 | 52.8 | NNW | Cloudy—light rain. | | 15/4 15 | 30.227 43.7 | 30.259 48.8 | 34 | 41.7 | 48.5 | 37.3 | 47.7 | N var | Fine and cloudless—hazy. | | 16/4 16 | 30.075 48.6 | 29.944 51.4 | 39 | 47.3 | 51.0 | 39.5 | 54.1 | SSW | Overcast. | | 17/4 17 | 30.047 52.3 | 30.119 55.5 | 45 | 51.3 | 55.4 | 46.8 | 55.7 | NW | Fine—light breeze. | | 18/4 18 | 30.127 55.3 | 30.129 59.0 | 54 | 56.0 | 61.1 | 50.8 | 61.4 | WSW | A.M. Cloudy. P.M. Cloudless—light wind. | | 19/4 19 | 30.080 57.7 | 30.050 60.8 | 57 | 58.2 | 59.8 | 53.3 | 60.5 | SW | A.M. Cloudy. P.M. Clear—light clouds. | | 20/4 20 | 29.873 58.8 | 29.808 60.5 | 56 | 57.5 | 59.4 | 55.5 | 60.2 | SW | Clear—light clouds. | | 21/4 21 | 29.805 57.0 | 29.703 58.6 | 53 | 53.8 | 57.0 | 48.3 | 57.7 | S | A.M. Clear and cloudless. P.M. Cloudy. Evening rainy. | | 22/4 22 | 29.658 54.4 | 29.728 55.1 | 42 | 51.4 | 53.0 | 48.6 | 53.7 | W | A.M. Cloudy. P.M. Fine. | | 23/4 23 | 29.955 49.7 | 29.934 51.6 | 41 | 44.8 | 49.8 | 41.7 | 49.8 | 0.019 | Fine—hazy. | | 24/4 24 | 29.957 46.7 | 29.913 51.5 | 43 | 45.7 | 51.2 | 39.8 | 51.2 | NNE | Fine—light clouds. | | 25/4 25 | 30.141 45.4 | 30.197 52.8 | 42 | 44.3 | 51.8 | 40.2 | 51.8 | NNW | Fine—hazy. | | 26/4 26 | 30.350 50.0 | 30.344 51.5 | 48 | 48.7 | 51.0 | 43.7 | 50.7 | NNE | Hazy. | | 27/4 27 | 30.397 46.3 | 30.322 49.5 | 41 | 41.7 | 49.5 | 40.2 | 49.7 | NNW | A.M. Foggy. P.M. Cloudless—hazy. | | 28/4 28 | 30.245 50.8 | 30.278 51.2 | 48 | 48.6 | 48.6 | 41.3 | 49.7 | NNE | Clear—light clouds and wind. | | 29/4 29 | 30.347 43.7 | 30.275 47.5 | 36 | 42.1 | 45.4 | 39.2 | 45.4 | NNE | Fine—hazy. | | 30/4 30 | 30.092 46.7 | 30.499 53.0 | 43 | 46.3 | 52.2 | 39.9 | 53.1 | WSW | Lightly cloudy—hazy. Rain P.M. | | 31/4 31 | 29.917 51.7 | 29.990 45.7 | 44 | 46.9 | 49.8 | 45.4 | 49.8 | NNE | A.M. Overcast. P.M. Clear—light clouds. | **Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr.** \[ \text{Mean} = 30.016 \] \[ \text{Mean} = 51.1 \] \[ \text{Mean} = 30.016 \] \[ \text{Mean} = 53.4 \] \[ \text{Mean} = 45.5 \] \[ \text{Mean} = 49.6 \] \[ \text{Mean} = 53.0 \] \[ \text{Mean} = 44.8 \] \[ \text{Mean} = 53.9 \] \[ \text{Sum} = 1,548 \] ### OBSERVANDA. Height of the Cistern of the Barometer above a Fixed Mark on Waterloo Bridge = 83 feet 2½ in. Height of the Receiver of the Rain Gauge above the Court of Somerset House = 79 feet 0 in. 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. ## METEOROLOGICAL JOURNAL FOR NOVEMBER, 1829. | 1829. Novem. | 9 o'clock, A.M. | 3 o'clock, P.M. | 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 | |--------------|----------------|----------------|----------------------------------------|----------------------|----------------------------------|-----------------------------|---------| | | Barom. Attach. | Barom. Attach. | Fahrenheit. | Self-registering. | Lowest. Highest. | | | | | Therm. | Therm. | 9 A.M. | | | | | | | | | 3 P.M. | | | | | | 1 | 30.157 | 43.8 | 30.171 | 44.5 | 27 | 35.7 | 41.8 | 31.7 | 41.8 | 0.025 | NW | Cloudless—hazy. | | 2 | 30.196 | 41.7 | 30.212 | 46.8 | 36 | 39.3 | 47.2 | 32.8 | 47.2 | WSW | Fine—hazy. | | 3 | 30.209 | 45.9 | 30.132 | 47.6 | 38 | 43.6 | 47.2 | 38.3 | 47.3 | WSW | Lightly cloudy—hazy. | | 4 | 29.803 | 48.7 | 29.647 | 51.0 | 45 | 48.2 | 50.8 | 43.0 | 51.3 | S | Overcast and foggy. Rain P.M. | | 5 | 29.967 | 48.8 | 30.267 | 51.5 | 43 | 49.2 | 50.4 | 39.7 | 50.4 | 0.131 | W | Nearly cloudless. | | 6 | 29.978 | 50.0 | 29.877 | 53.6 | 45 | 48.3 | 52.0 | 42.3 | 52.7 | WSW | Lightly cloudy—hazy. | | 7 | 29.908 | 49.3 | 29.884 | 51.2 | 42 | 45.2 | 48.8 | 42.8 | 48.8 | 0.011 | WNW | Nearly cloudless—hazy. | | 8 | 30.017 | 42.5 | 30.015 | 49.6 | 38 | 38.5 | 47.0 | 34.6 | 46.6 | WSW | Fine—lightly cloudy—light wind. | | 9 | 30.046 | 47.7 | 30.081 | 49.6 | 43 | 43.8 | 48.4 | 37.4 | 48.4 | W | Fine—lightly cloudy—light wind. | | 10 | 30.007 | 48.4 | 29.866 | 51.2 | 43 | 43.3 | 49.5 | 43.3 | 52.4 | SSW | Lightly cloudy. | | 11 | 29.964 | 48.6 | 30.018 | 51.4 | 42 | 42.4 | 48.8 | 40.3 | 52.2 | W | Strong fog. | | 12 | 29.884 | 51.6 | 29.839 | 55.6 | 52 | 52.7 | 56.4 | 41.2 | 56.4 | 0.278 | W | Overcast—foggy. | | 13 | 30.052 | 54.6 | 30.160 | 52.4 | 50 | 50.4 | 47.0 | 49.8 | 50.4 | 0.006 | E | Overcast—foggy. | | 14 | 30.185 | 51.4 | 30.117 | 51.8 | 43 | 44.1 | 46.8 | 41.4 | 47.8 | 0.006 | E | Overcast—foggy. | | 15 | 29.890 | 51.8 | 29.822 | 55.6 | 48 | 48.5 | 51.8 | 42.7 | 51.8 | WSW | Lightly cloudy. Light rain. | | 16 | 30.169 | 46.3 | 30.247 | 48.0 | 31 | 38.4 | 41.2 | 35.4 | 41.4 | 0.011 | N | Clear and cloudless—light wind. | | 17 | 30.377 | 42.6 | 30.314 | 45.8 | 34 | 34.8 | 41.4 | 31.3 | 41.4 | NNE | A.M. Cloudless. P.M. Light clouds. | | 18 | 30.387 | 43.7 | 30.388 | 46.2 | 38 | 38.3 | 41.8 | 33.8 | 41.8 | NNE | Light clouds and haze. | | 19 | 30.428 | 39.7 | 30.364 | 40.5 | 32 | 32.3 | 35.5 | 30.3 | 35.5 | NNE | Strong fog. | | 20 | 30.352 | 39.2 | 30.300 | 40.2 | 30 | 30.3 | 36.4 | 27.5 | 36.4 | NW | Very dense fog. Hoar frost A.M. | | 21 | 30.286 | 37.9 | 30.204 | 39.8 | 32 | 32.4 | 38.6 | 26.8 | 38.6 | NW | A.M. Strong fog. P.M. Fine. | | 22 | 29.662 | 39.2 | 29.477 | 41.8 | 38 | 38.3 | 42.0 | 31.3 | 42.0 | SSW | Cloudy—light rain. | | 23 | 29.603 | 40.7 | 29.103 | 42.5 | 38 | 40.3 | 40.8 | 36.2 | 41.7 | 0.064 | NNE | Light clouds. Rain P.M. | | 24 | 29.662 | 40.6 | 29.016 | 40.6 | 33 | 39.2 | 38.0 | 36.4 | 38.8 | 0.019 | NE | Overcast—light brisk wind. | | 25 | 29.526 | 37.2 | 30.109 | 37.2 | 32 | 31.9 | 33.0 | 29.7 | 36.3 | NE | Snow. | | 26 | 29.858 | 38.6 | 29.796 | 40.5 | 36 | 37.8 | 39.2 | 30.3 | 39.2 | 0.128 | E | A.M. Overcast. P.M. Fine. | | 27 | 29.779 | 41.9 | 29.720 | 42.2 | 38 | 38.4 | 40.4 | 36.2 | 40.4 | 0.014 | N | A.M. Strong fog. P.M. Light deposition. | | 28 | 29.751 | 42.3 | 29.237 | 43.7 | 40 | 40.0 | 42.5 | 36.6 | 42.5 | NNE | Foggy. | | 29 | 29.860 | 44.0 | 29.843 | 45.3 | 41 | 41.7 | 43.7 | 39.3 | 43.7 | NNE | Foggy. | | 30 | 29.858 | 43.7 | 29.815 | 44.2 | 39 | 40.7 | 40.0 | 38.9 | 40.7 | ESE | Foggy—light wind. | Mean Mean Mean Mean Mean Mean Mean Mean Sum | 29.994 | 44.7 | 29.935 | 46.7 | 38.9 | 40.7 | 44.3 | 36.7 | 44.9 | 0.693 | Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. .............. { 9 A.M. 3 P.M. } { 29.966 29.902 } ### 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 0 in. 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. ## METEOROLOGICAL JOURNAL FOR DECEMBER, 1829. | 1829, Decem. | 9 o'clock, A.M. | 3 o'clock, P.M. | 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 | |--------------|-----------------|-----------------|--------------------------------------|---------------------|-----------------------------------|-------------------------------|---------| | | Barom. | Attach. Ther. | Barom. | Attach. Ther. | Fahrenheit. | Self-registering. | Lowest. | Highest. | | | 1 | 29.817 | 43.3 | 29.843 | 40.4 | 40 | 40.1 | 39.8 | 38.9 | 40.7 | ESE | Light clouds and wind. | | 2 | 29.753 | 42.7 | 29.714 | 44.2 | 40 | 40.6 | 43.4 | 38.3 | 43.4 | E | Foggy. | | 3 | 29.799 | 43.8 | 29.995 | 44.5 | 41 | 41.5 | 42.8 | 39.8 | 42.8 | ESE | Foggy—light wind. | | 4 | 29.801 | 44.7 | 29.842 | 46.0 | 44 | 43.6 | 44.6 | 40.4 | 44.6 | ESE | Light fog. | | 5 | 30.272 | 46.6 | 30.349 | 48.2 | 45 | 45.5 | 48.5 | 42.7 | 48.5 | ESE | Foggy. | | 6 | 30.522 | 47.3 | 30.490 | 46.3 | 42 | 42.0 | 39.7 | 41.3 | 42.0 | ENE | Overcast—light wind. | | 7 | 30.374 | 39.7 | 30.273 | 40.1 | 29 | 32.3 | 35.2 | 28.4 | 35.4 | NE | Foggy. Hoar frost A.M. | | 8 | 30.313 | 39.8 | 30.341 | 39.5 | 29 | 35.0 | 35.4 | 30.9 | 35.4 | WSW | Overcast—light wind. | | 9 | 30.379 | 39.3 | 30.291 | 38.2 | 29 | 33.4 | 36.0 | 31.4 | 36.0 | NNE | A.M. Foggy. P.M. Fine. | | 10 | 30.139 | 38.2 | 30.100 | 38.6 | 33 | 35.7 | 36.2 | 33.2 | 36.2 | ENE | Overcast. | | 11 | 30.163 | 40.0 | 30.151 | 41.0 | 31 | 37.6 | 39.2 | 31.7 | 39.2 | SSE | A.M. Overcast. P.M. Fine. | | 12 | 30.180 | 40.6 | 30.172 | 42.0 | 35 | 38.7 | 41.2 | 35.0 | 42.6 | SSW | Light clouds and wind. | | 13 | 30.230 | 43.2 | 30.213 | 46.4 | 39 | 39.7 | 46.0 | 37.7 | 46.0 | S | Clear and cloudless—light wind. | | 14 | 30.304 | 43.3 | 30.306 | 43.8 | 37 | 37.0 | 39.6 | 35.2 | 39.6 | N | Strong fog. | | 15 | 30.341 | 40.0 | 30.306 | 40.8 | 33 | 33.7 | 39.6 | 31.6 | 39.6 | N | Fog. | | 16 | 30.268 | 41.3 | 30.191 | 41.2 | 37 | 37.0 | 39.5 | 32.7 | 39.5 | N | Lightly cloudy. Evening, drizzling rain. | | 17 | 29.985 | 39.6 | 29.884 | 40.6 | 35 | 35.3 | 37.5 | 34.4 | 37.5 | 0.017 | NNE | Overcast. | | 18 | 29.628 | 40.3 | 29.672 | 41.4 | 35 | 36.0 | 38.0 | 31.8 | 38.3 | NE | Cloudy and foggy. A.M. light snow. | | 19 | 29.868 | 39.3 | 29.828 | 40.4 | 34 | 35.6 | 36.5 | 32.8 | 37.0 | N | Light clouds and wind. | | 20 | 29.852 | 37.6 | 29.877 | 37.2 | 26 | 32.3 | 33.1 | 30.7 | 33.1 | N | Overcast—light wind. A.M. Fall of snow, early. | | 21 | 29.918 | 34.7 | 29.830 | 36.0 | 25 | 28.3 | 33.0 | 26.3 | 33.0 | WSW | Foggy. Snow P.M. | | 22 | 29.721 | 34.7 | 29.716 | 36.8 | 30 | 32.3 | 34.8 | 27.0 | 34.8 | 0.033 | E | Overcast. | | 23 | 29.747 | 34.6 | 29.678 | 32.5 | 27 | 31.7 | 29.0 | 29.7 | 31.7 | 0.044 | NNE | Overcast—brisk wind. | | 24 | 29.714 | 30.8 | 29.738 | 31.8 | 25 | 27.7 | 28.9 | 24.6 | 30.3 | 0.008 | N | Overcast. Snow A.M. | | 25 | 30.026 | 32.9 | 30.067 | 33.8 | 25 | 29.4 | 30.6 | 26.5 | 30.6 | NE | Light clouds and wind. | | 26 | 30.307 | 30.5 | 30.330 | 30.5 | 22 | 27.3 | 28.0 | 25.6 | 28.0 | N | Fine—light clouds. | | 27 | 30.403 | 29.2 | 30.380 | 30.8 | 24 | 25.8 | 28.5 | 25.5 | 28.5 | NE | A.M. Fine. P.M. Overcast. | | 28 | 30.329 | 26.5 | 30.230 | 28.6 | 20 | 20.5 | 29.8 | 18.2 | 29.8 | NW | Overcast. | | 29 | 30.302 | 28.0 | 30.313 | 28.2 | 21 | 24.5 | 26.5 | 20.2 | 27.2 | NE | Overcast—light fog. | | 30 | 30.413 | 28.8 | 30.419 | 30.2 | 20 | 27.5 | 30.0 | 23.8 | 30.0 | S | Overcast—light wind. | | 31 | 30.500 | 30.5 | 30.539 | 32.4 | 25 | 31.0 | 31.8 | 27.5 | 31.8 | E | A.M. Overcast. P.M. Fine. | **Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr.** | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Sum | |------|------|------|------|------|------|------|------|-----| | 30.109 | 37.8 | 30.099 | 38.5 | 31.5 | 34.1 | 36.2 | 31.4 | 36.6 | 0.102 | **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 0 in. 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.