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 Acton]
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SULPHUR EMISSION
Amount of SO3 in Milligrams per 100 Square Centimetres per day
MONTHLY AVERAGE FOR ALL STATIONS
SOLID DEPOSIT
Amount in Tons per Square Mile
MONTHLY AVERAGE FOR ALL STATIONS