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 London County Council]
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IV.—TABULATION OF THE RESULTS OF THE CHEMICAL
EXAMINATION OF THE CRUDE SEWAGE, OF THE
"CHEMICAL" EFFLUENT, AND OF THE VARIOUS
COKE-BED EFFLUENTS.