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 1866
[Report of the Medical Officer of Health for London, City of]
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No. VI.—
| MONTHS. 1866.67. | 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. | 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. | Ins. | Ins. | Ins. | Ins. | |
| October | 30.026 | 30.488 | 29.692 | 52.9 | 63.6 | 39.9 | 8.8 | 50.4 | 52.9 | 48.0 | 83 | 3.7 | 0.8 | 2.20 | 2.28 | 0.82 | 0.85 | 0.01 | 0.01 |
| November | 29.899 | 30.332 | 29.326 | 46.3 | 58.2 | 31.9 | 8.9 | 44.0 | 46.3 | 41.2 | 83 | 3.0 | 0.6 | 1.46 | 1.55 | 0.34 | 0.36 | 0.02 | 0.02 |
| December | 29.890 | 30.506 | 29.312 | 46.0 | 57.0 | 33.5 | 8.0 | 44.4 | 46.0 | 42.8 | 89 | 3.2 | 0.4 | 2.06 | 213 | 0.49 | 0.49 | 0.02 | 0.02 |
| January | 29.426 | 30.142 | 28.782 | 36.2 | 54.0 | 14.4 | 8.8 | 35.6 | 36.2 | 34.7 | 94 | 2.3 | 0.2 | 2.13 | 2.65 | 0.43 | 0.42 | 001 | 0.02 |
| February | 30.019 | 30.576 | 28.880 | 46.2 | 56.0 | 36.9 | 8.0 | 44.3 | 46.2 | 42.1 | 86 | 3.1 | 0.5 | 1.34 | 1.38 | 0.34 | 0.31 | 0.01 | 0.01 |
| March. | 29.512 | 30.778 | 29.308 | 38.2 | 560 | 28.9 | 8.7 | 35.6 | 38.2 | 30.9 | 75 | 2.0 | 0.7 | 1.88 | 2.09 | 0.30 | 0.30 | 0.02 | 0.02 |
| April | 29.778 | 30.472 | 29.340 | 49.2 | 64.6 | 36.9 | 11.7 | 46.1 | 49.2 | 42.8 | 79 | 3.1 | 0.9 | 2.40 | 2.55 | 0.21 | 0.23 | 0.01 | 0.01 |
| May | 29.852 | 30.172 | 29.538 | 53.9 | 78.3 | 36.4 | 15.7 | 49.7 | 53.9 | 46.1 | 74 | 3.5 | 1.2 | 1.73 | 1.84 | 0.45 | 0.46 | 0.01 | 0.02 |
| June | 30.037 | 30.600 | 29.728 | 59.0 | 81.0 | 47.2 | 15.3 | 54.2 | 59.0 | 49.9 | 72 | 4.0 | 1.6 | 1.26 | 131 | 0.72 | 0.72 | 0.03 | 0.04 |
| July | 29.806 | 30.334 | 29.534 | 59.7 | 75.0 | 50.5 | 12.6 | 55.4 | 59.7 | 51.6 | 75 | 4.3 | 1.4 | 3.84 | .. | 0.40 | 0.41 | 0.03 | 0.04 |
| August | 29.908 | 30.228 | 29.740 | 62.4 | 840 | 49.5 | 11.9 | 57.8 | 62.4 | 53.9 | 74 | 4.6 | 1.7 | 2.22 | 2.29 | 0.66 | 0.67 | 0.02 | 0.03 |
| September | 30.037 | 30.500 | 29.818 | 58.6 | 760 | 44.4 | 11.9 | 56.6 | 58.6 | 55.2 | 90 | 4.8 | 0.6 | 2.06 | 2.16 | 0.47 | 0.47 | 0.03 | 0.04 |
Barometer. The highest readings were on October 6, November 29, December 22, January 31, February 21, March 2, April 1, May 24, June 27,
July 8, August 29, September 25. The lowest readings were on October 25, November 16, December 31, January 8, February 6, March 19,
April 20, May 11, June 7, July 15, August 8, September 12.
Temperature. The highest were on October 3, November 2, December 6, January 24, February 15, March 26, April 19, May 6, June 12,
July 1, August 14, September 1. The lowest were on October 29, November 20, December 1, January 4, February 28, March 18, April 1,
May 23, June 22, July 30, August 3, September 25.
Rain. .The greatest fall on October 19, November 19, December 6, January 10, February 17, March 22, April 9, May 11, June 3, July 27, August 20,
September 5. The least fall on October 6, November 24, December 28, January 24, February 4, March 23, April 18, May 17, June 17,
July 3, August 9, September 7.
Electricity. Positive generally throughout the year. WILLIAM HAYWOOD.