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
Leyton 1935
[Report of the Medical Officer of Health for Leyton]
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TABLE 1.—METEOROLOCxICAL TABLE FOR LONDON. 1935.
| 1935. | Barometer. | Air Temperature. | Hygrometer. | Earth Temperature. | Bright Sunshine. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Pressure at Station Level, 152 ft.* (Average Correction to Sea Level + 5.6 mb.) | Mean of | Mean of A and B | Difference from Average.† | Absolute Maximum and Minimum. | Mean of Observations at 9 a.m. and 9 p.m. | At 1 foot depth. | At 4 feet depth. | Dally Mean. | Difference from Average.† | Per cent, of Possible. | ||||||||
| A | B | Maximum. | Day of Month | Minimum. | Day of Month. | Dry Bulb. | Depression of Wet bulb. | Vapour Pressure. | Humidity. | |||||||||
| Maximum. | Minimum. | |||||||||||||||||
| mb. | of. | of. | of. | of. | of. | of. | of. | f. | mb. | % | of. | of. | hr. | hr. | ||||
| January | 1020.3 | 44.1 | 36.5 | 40.3 | +0.2 | 54 | 1 | 25 | 29 | 40.4 | 1.6 | 7.5 | 86 | 43.1 | 46.7 | 0.52 | —0.77 | 6 |
| February | 1002.9 | 48.7 | 38.3 | 43.5 | +3.2 | 57 | 2 | 28 | 9 | 42.6 | 2.2 | 7.7 | 81 | 42.5 | 44.8 | 1.53 | —0.60 | 15 |
| March | 1017.3 | 52.2 | 36.8 | 44.5 | + 1.2 | 67 | 21 | 29 | 9 | 43.7 | 2.4 | 7.9 | 81 | 43.1 | 44.6 | 3.10 | —0.18 | 26 |
| April | 1006.3 | 55.9 | 40.1 | 48.0 | +0.7 | 64 | 23 | 31 | 5 | 46.9 | 3.0 | 8.6 | 77 | 46.9 | 47.0 | 3.45 | —1.30 | 25 |
| May | 1015.6 | 61.2 | 42.5 | 51.9 | —2.8 | 76 | 6 | 28 | 17 | 50.7 | 4.2 | 9.1 | 71 | 51.2 | 49.9 | 5.56 | —0.94 | 36 |
| June | 1010.7 | 71.6 | 52.3 | 61.9 | + 2.7 | 84 | 24 | 40 | 9 | 60.9 | 3.8 | 14.3 | 79 | 58.2 | 54.3 | 6.82 | + 0.09 | 41 |
| July | 1017.8 | 78.3 | 55.6 | 66.9 | + 3.6 | 87 | 10. 14 | 46 | 31 | 65.9 | 6.3 | 14.7 | 67 | 63.7 | 59.6 | 8.58 | +2.18 | 53 |
| August | 1013.7 | 76.9 | 53.0 | 64.9 | + 2.4 | 91 | 22 | 42 | 28 | 64.2 | 5.5 | 14.6 | 71 | 62.7 | 60.4 | 5.74 | —0.35 | 40 |
| September | 1009.5 | 68.2 | 49.7 | 58.9 | + 1.1 | 77 | 12 | 38 | 26 | 58.0 | 3.1 | 13.5 | 81 | 58.0 | 59.0 | 5.14 | + 0.12 | 41 |
| October | 1007.5 | 57.7 | 43.8 | 50.7 | —0.4 | 63 | 16 | 28 | 21 | 50.3 | 2.6 | 10.4 | 81 | 52.7 | 55.3 | 3.25 | + 0.08 | 30 |
| November | 1001.7 | 50.9 | 39.5 | 45.2 | + 2.0 | 63 | 3 | 29 | 25 | 45.7 | 1.5 | 9.3 | 89 | 47.9 | 51.1 | 1.60 | —0.06 | 18 |
| December | 999.5 | 42.5 | 35.0 | 38.7 | —2.1 | 52 | 28 | 20 | 23 | 38.5 | 1.3 | 7.1 | 88 | 41.4 | 45.9 | 0.57 | —0.43 | 7 |
| Year | 1010.2 | 59.0 | 43.6 | 51.3 | + 1.0 | 91 | Aug. 22 | 20 | Dec. 23 | 50.7 | 3.1 | 10.4 | 79 | 51.0 | 51.5 | 3.83 | —0.18 | 31 |
*The hours of observation are 9 a.m. and 9 p.m. local time.
† The averages of temperature and sunshine used are obtained from observations extending over 30 years (1901-1930), those of rainfall are for the 35 years (1831-1915).
Pressure is expressed in millbars (1000 mb.= 29.53l mercury-inches). Wind Force.—The summary is obtained from the records of a cup anemograph having 5 in. cups and 15 in. arms.
The factor used is 3. Winds above 43 miles per hour are reckoned as gales and winds between 21 and 43 miles per hour as moderate or strong winds. Direction is not tabulated when the speed
of the wind is less than 5 miles per hour and winds of less than that velocity are counted as calm.