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 1899
[Report of the Medical Officer of Health for London County Council]
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DIAGRAM 3.
Showing the number of Bacillus Coll (or closely allied forms) In 1 cc of Barking
crude sewage, and In l cc.of the effluents from the primary and secondary coarse
beds (Series A); and the primary coarse bed and secondary flne bed (Series B).