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 Southall]
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Graph C
Atmospheric Pollution by Sulphur Oxides (Lead Peroxide Method)
48
Sulphur Compounds as Milligrams SO3 per day per 100 sq. cm.
Lead Peroxide Gauge at Railway Allotments
Lead Peroxide Gauge at The Recreation Ground