Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Wandsworth, Metropolitan Borough]
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TABLE II.
Date. | Illuminating Power in Standard Sperm Candles. | Pressure in inches of Water. |
---|---|---|
April, 1911 | 16.0 | 3.6 |
May, ,, | 15.7 | 3.9 |
June, „ | 15.7 | 3.9 |
July, ,, | 16.3 | 4.0 |
August, „ | 16.0 | 4.1 |
September, „ | 15.5 | 4.5 |
October, „ | l6.0 | 4.6 |
November, „ | 15.8 | 4.2 |
December, „ | l6.1 | 4.7 |
January, 1912 | 162 | 4.4 |
February, „ | 15.4 | 3.8 |
March, ,, | 15.6 | 3.6 |
Average for the year ended 31st March, 1912 | 15.9 | 4.1 |