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 Holborn Borough]
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Jan. | Feb. | March | April | May | June | July | August | Sept. | Oct. | Nov. | Dec. | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
London— | ||||||||||||
Hampstead | 0.5 | 0.7 | 2.2 | 2.5 | 4.2 | 4.4 | 5.5 | 5.0 | 3.7 | 1.3 | 0.7 | 0.5 |
Kingsway | 0.3 | 0.5 | 1.6 | 1.8 | 3.1 | 2.3 | 3.8 | 1.9. | 1.8 | 0.8 | 0.4 | 0.3 |
Lowestoft | 1.0 | 2.3 | — | 4.4 | 8.8 | 11.7 | 10.5 | 11.6 | 12.3 | 4.1 | 1.6 | 1.8 |
Ventnor | 1.9 | 2.3 | 4.8 | 5.3 | 11.1 | 12.3 | 12.6 | 9.3 | 8.8 | 3.1 | 2.3 | 1.6 |
Hull | 0.2 | 0.2 | 0.7 | 1.0 | 5.1 | 5.8 | 4.7 | 2.4 | 1.7 | 0.6 | 0.3 | 0.3 |
This table represents biologically active ultra-violet rays measured by the acetone blue fading method.
One degree on the scale equals 2-4 times the amount of ultra-violet required to produce a very moderate erythema of the white arm—arms
differing in sensitiveness.