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 1865
[Report of the Medical Officer of Health for London, City of ]
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No. VI.—Meteorology of the City of London for each Month in the Year ending in September 1866, from Observations made at the Engineer's Office, Guildhall, under the direction of Mr. Haywood.
| MONTHS. 1865-66. | Barometer. | Dry Thermometer. | Wet Thermometer or Hygrometer. | Rain Gauges. | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Tret-sure. | Highest Pressure. | Lowest Pressure. | Mean Temperature. | Highest Temperature. | Lowest Temperature. | Mean Daily , Range. | Mean Temperature. | Dew Point. | Degree of Humidity. ' | Weight of vapour in cubic foot of air. | | Vapour required to satu-rate ditto. • | Total Fall. | Greatest Fall. | Lowest Fall. | |||||||
| Wet Bulb. | Dry Bulb. | On Roof. | On Grnd. | On Roof. | On Grnd. | On Hoof. | On Grnd. | ||||||||||||||
| Inches. | Inches. | Inches. | Deg. | Deg. | Deg. | Deg. | Deg. | Deg. | Deg. | Grns. | Grns. | Ins. | Ins. | Ins. | Ids. | Ins. | Ins. | ||||
| October | 29524 | 30.244 | 29.042 | 52.8 | 70.3 | 39.0 | 11.2 | 50.4 | 52.8 | 48.0 | 86 | 3.8 | 0.6 | 5.51 | 5.82 | 0.72 | 0.76 | 0.03 | 0.03 | ||
| November | 29.774 | 30.474 | 28.974 | 46'4 | 56.4 | 37.0 | 8.9 | 44.7 | 46.4 | 42.8 | 88 | 3.1 | 0.5 | 1.93 | 1.95 | 0.24 | 0.24 | 0.01 | o.o1 | ||
| December | 30178 | 30.764 | 29.346 | 450 | 530 | 32.5 | 6.2 | 43.1 | 45.0 | 40.7 | 85 | 2.9 | 0.5 | 0.81 | 0.78 | 0.41 | 0.38 | 0.01 | o.o1 | ||
| January | 29.827 | 30.684 | 28.846 | 43.9 | 530 | 290 | 7.9 | 42.2 | 43.9 | 40.1 | 86 | 2.9 | 0 .4 | 3.64 | 3.76 | 1.00 | 1.06 | 0.01 | 0.01 | ||
| February | 29.644 | 30.522 | 29.190 | 42.7 | 59.5 | 29.9 | 8.7 | 40.9 | 42.7 | 38.8 | 87 | 2.7 | 0.5 | 3.83 | 3.86 | 0.42 | 0.42 | 0.02 | 0.02 | ||
| March | 29.614 | 30.342 | 29.102 | 40.8 | 600 | 27.4 | 9.6 | 38.5 | 40.8 | 35.7 | 83 | 2. 8 | 0.5 | 1.23 | 1.32 | 0.33 | 0.33 | 0.02 | 0.02 | ||
| April | 29.644 | 30.446 | 29.484 | 49.8 | 72.8 | 37.9 | 12.5 | 46.4 | 49.8 | 42.8 | 79 | 3.1 | 0.9 | 1.72 | 1.81 | 0.38 | 0.38 | 002 | 0.02 | ||
| May | 29 686 | 30.428 | 29.512 | 51.1 | 68.5 | 38.4 | 14.8 | 46.4 | 51.1 | 41*8 | 71 | 3.0 | 1.2 | - | 1.36 | 0.35 | 0.01 | 002 | |||
| June | 29.866 | 30.278 | 29.690 | 61.5 | 83.5 | 47.4 | 15.5 | 56.5 | 61.5 | 52.2 | 72 | 4.3 | 1.7 | 3.88 | 3.90 | 1.00 | 0.98 | 001 | 0.02 | ||
| July | 29.862 | 30.368 | 29.412 | 620 | 84.0 | 51.0 | 14.1 | 56.7 | 620 | 52.1 | 70 | 4.3 | 1.9 | 1.89 | 1.91 | 0.46 | 0.45 | 0.01 | 0.01 | ||
| August | 29.700 | 30134 | 29.350 | 591 | 75.0 | 51 .0 | 121 | 551 | 59.1 | 51.4 | 76 | 4.3 | 1.3 | 2.44 | 2.54 | 0.68 | 0.69 | 0.01 | 0.01 | ||
| September | 29.688 | 30.100 | 29.198 | 56.9 | 69. 0 | 47.0 | 10.4 | 53.8 | 56.9 | 50.9 | 81 | 4.1 | 1.0 | 3.48 | 3.60 | 0.56 | 0.54 | 0.01 | 0.01 | ||
Barometer..The highest readings were on October 4, November 13, December 15, January 25, February 21, March 10, April 23, May 16, June 9,
July 11, August 11, September 18. The lowest readings were on October 27, November 22, December 29, January 11, February 28, March 24,
April 28, May 1, June 1, July 3, August 29, September 22.
Temperature..The highest were on October 2, November 20, December 6, January 21, February 3, March 30, April 27, May 19, June 27,
July 13, August 26, September 1. The lowest were on October 20, November 14, December 27, January 12, February 20, March 1, April 5,
May 2, June 18, July 23, August 20, September 25.
Rain..The greatest fall on October 19, November 3, December 29, January 11, February 10, March 24, April 30, May 11, June 22, July 2, August 30,
September 3. The least fall on October 24, November 25, December 7, January 31, February 6, March 27, April 13, May 31, June 13,
July 3, August 27, September 28.
Electricity..Positive generally throughout the year. WILLIAM HAYWOOD.