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

Walthamstow 1951

[Report of the Medical Officer of Health for Walthamstow]

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Plate CountColiform Reaction (in 1/10 ml.)Bacterium coli (in 1/10 ml.Satisfactory•PassableNot PassableMethylene Blue Test
Reduction timeGrade
1,600––XNot in 4 hoursI
15,000––X„ 4 „I
4,000––X„ 4 „I
6,000––X„ 4 „I
900––X„ 4 „I
400––X„ 4 „I
2,200––X„ 4 „I
9,000––X„ 4 „I
300xl tube–X„ 4 „I
1,200––X„ 4 „I
4,000––X„ 4 „I
4,200––X„ 4 „I
700––X„ 4 „I
2,200––X„ 4 „I
3,000––X„ 4 „I
1,200xl tube–X„ 4 „I
1,500––X„ 4 „I
200––X„ 4 „I
900––X„ 4 „I
400––X„ 4 „I
4,200––X„ 4 „I
800––X„ 4 „I
650––X„ 4 „I
3,200––X„ 4 „I
800––X„ 4 „I
180––X„ 4 „I
3,200––X„ 4 „I
1,500xl tube–X„ 4 „I
2,800––X„ 4 „I
1,200––X„ 4 „I
3,000xl tube–X„ 4 „I
1,200––X„ 4 „I
1,100––X„ 4 „I
1,500––X„ 4 „I
600––X„ 4 „I
2,000––X„ 4 „I
1,800––X„ 4 „I
1,200––X„ 4 „I
1,700––XIn 4 „II
1,200x2 tubes–X„ 4 „II
400––X„ 4 „II
8,000––X„ 4 „II
6,000xl tube–X„ 4 „II
5,500x2 tubes–X„ 4 „II
5,500x2 tubes–X„ 3½ „II
500––x„ 3½ „II
3,700––X„ 3½ „II
5,200x2 tubes–X„ 3½ „II
2,000xl tube–X„ 3 „II
800xl tube–X„ 3 „II
15,000x2 tubes–X„ 3 „II
40,000x3 tubes–X„ 3 „II
7,000––x„ 3 „II
30,000xl tube–x„ 3 „II
7,000xl tube–X„ 3 „II
8,000x3 tubesx2 tubesX„ 3 „II
3,300x3 tubes–X„ 3 „II
2,400x2 tubes–x„ 3 „II
20,000––X„ 3 „II