London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
City of London 1863
[Report of the Medical Officer of Health for London, City of ]
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No. VII.—Meteorology of the City of London for each Month in the Year ending in September 1864, from Observations made at the Engineer's Office, Guildhall, under the direction of Mr. Haywood.
| MONTHS. 1863-64. | Barometer. | Dry Thermometer. | Wet Thermometer or Hygrometer. | Rain Gauges. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Pressure. | Highest Pressure. | Lowest Pressure. | Mean Temperature. | Highest Temperature. | Lowest Temperature. | Mean Daily Range. | Mean Temperature. | Dew Point. | Degree of Humidity. Saturation =100. | Weight of vapour in cubic foot of air. | Vapour required to saturate ditto. | Total Fall. | Greatest Fall. | Lowest Fall. | |||||
| Wet Bulb. | Dry Bulb. | On Roof. | On Grnd. | On Roof. | On Grnd. | On Roof. | On Grnd. | ||||||||||||
| Inches. | Inches. | Inches. | Deg. | Deg. | Deg. | Deg. | Deg. | Deg. | Deg. | Deg. | Grns. | Grns. | Ins. | Ins. | In | Ins. | Ins. | Ins. | |
| October | 29.709 | 30.298 | 29.082 | 53.4 | 63.8 | 41.3 | 10.8 | 50.3 | 53.4 | 46.1 | 80 | 3.5 | 1.2 | 1.78 | 0.36 | 0.39 | 0.01 | 0.01 | |
| November | 29.976 | 30.538 | 29.036 | 47.7 | 59.0 | 36.5 | 8.3 | 46.3 | 47.7 | 45.0 | 93 | 3.4 | 0.3 | 1.56 | 1.73 | 0.24 | 0.27 | 0.04 | 0.05 |
| December | 30.016 | 30.528 | 29.006 | 45.5 | 53.9 | 32.2 | 8.8 | 43.3 | 45.5 | 40.7 | 85 | 2.9 | 0. | 0.97 | 1.05 | 0. | 0.64 | 0.01 | 0.01 |
| January | 30.150 | 30.576 | 29.852 | 39.4 | 54.0 | 22.l | 6.9 | 37.6 | 39.4 | 35.4 | 84 | 2.0 | 0.5 | 1.12 | 1.12 | 0.27 | 0.25 | 0.01 | 0.01 |
| February | 29.872 | 30.382 | 29.420 | 37.7 | 54.0 | 27.0 | 7.8 | 36.6 | 37.7 | 35.6 | 91 | 2.4 | 0.3 | 0.68 | 0.73 | 0.25 | 0.25 | 0.01 | 0.01 |
| March | 29.585 | 30.198 | 28.956 | 42.3 | 55.7 | 32.3 | 11.4 | 39.8 | 42.3 | 36.8 | 84 | 2.5 | 0.5 | — | 2.50 | — | — | 0.01 | |
| April | 30.043 | 30-420 | 29.682 | 49.0 | 71.8 | 38.2 | 13.4 | 44.2 | 49.0 | 38.6 | 67 | 2.7 | .3 | 0.81 | 0.86 | 0.40 | 0.45 | 0.01 | 0.01 |
| 29.932 | 30.290 | 29.622 | 54.6 | 77.6 | 44.9 | 12.6 | 50.0 | 54.6 | 45.6 | 74 | 3.4 | 1.3 | 0.91 | 0.90 | 0.15 | 0.17 | 0.02 | 0.02 | |
| June | 29.887 | 30.292 | 29.560 | 57.7 | 71.7 | 46.0 | 13.3 | 52.0 | 57.7 | 46.6 | 66 | 3.6 | 11 | 1.78 | l.78 | 0.40 | 1.38 | 0.01 | 0.01 |
| July | 29.963 | 30.222 | 29.754 | 620 | 78.5 | 51.4 | 15.2 | 55.9 | 62.0 | 50.1 | 63 | 4.0 | 2.4 | 0.50 | 0.47 | 0.13 | 0.12 | 0.01 | 0.01 |
| August | 30.020 | 30.470 | 29.704 | 60.1 | 78.5 | 46.9 | 14.2 | 54.5 | 60.1 | 49.7 | 68 | 3.9 | 1.9 | 1.24 | 1.21 | 0.37 | 0.35 | 0.01 | 0.01 |
| September | 29.674 | 30.424 | 29.383 | 59.9 | 73.3 | 47.4 | 10.8 | 4.2 | 57.9 | 50.4 | 76 | 4.1 | 1.3 | 2.63 | 2.64 | 0.71 | 0.77 | 0.02 | 0.01 |
Barometer.—The highest readings were on October 23, November 6, December 18, January 4, February 19, March 17, April 8, May 24, June 20,
July 30, August 15, September 26. The lowest readings were on October 30, November 2, December 2, January 23, February 12, March 7,
April 1, May 9, June 14, July 2, August 19, September 16.
Temperature.—The highest were on October 4, November 4, December 12, January 22, February 13, March 20, April 20, May 20, June 20,
July 21, August 5, September 8. The lowest were on October 24, November 30, December 23, January 7, February 20, March 10, April 6,
May 30, June 1, July 9, August 25, September 12.
Rain.—The greatest fall on October 2, November 2, December 3, January 17, February 12, March 4, April 6, May 10, June 14, July 4, August 21;
September 17. The least fall on October 13, November 6, December 28, January 23, February 3, March 5, April 4, May 11, June 21,
July 7, August 29, September 10.
Electricity.—Positive generally throughout the year. WILLIAM HAYWOOD.