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
London County Council 1956
[Report of the Medical Officer of Health for London County Council]
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Figure 2—DAILY CONCENTRATION OF SMOKE AND SULPHUR DIOXIDE
(Average reading of seven stations)
AND HIGHEST AND LOWEST DAILY TEMPERATURE
(Recordings from Kew Observatory)
IN FOUR FOGGY PERIODS