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 4
Showing the number of spores of Bacillus Enteritidls Sporogene In Barking crude
sewage and In the effluents from the primary and secondary coarse beds
(Series A); and the primary coarse bed and secondary fine bed (Series B).
The "upward" columns refer to the SMALLEST amount of the liquid yielding a POSITIVE
result as regards Bacillus Enteritidis Sporogenes when inoculated into milk tubes.
The "downward" columns refer to the LARGEST amount of the liquid yielding a NEGATIVE
result when inoculated Into milk tubes.