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 1950

[Report of the Medical Officer of Health for Walthamstow]

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Table: The following summary shows the comparative results of the old standard test and the new (provisional) test. Grades 1 and 2 of the latter are considered satisfactory.

The following summary shows the comparative results of the old standard test and the new (provisional) test. Grades 1 and 2 of the latter are considered satisfactory.

Plate CountColiform Reaction (in 1/10 ml.)Bacterium coli (in 1/10 ml.)Satisfactory*PaseableNot PassableMethylene Reduction timeBlue Test Grade
3,000——XNot in 4½ hours1
800-—X„ 4½ „1
2,500——X„ 4½ „1
1,400——X„ 4½ „1
1,600-—X„ 4½ „1
600——X„4½ „1
3,000——X„ 4½ „1
2,500——X„ 4½ „1
2,000——X„ 4½ „1
800——X„ 4½ „1
1,400——X„ 4½ „1
800-—X„ 4½ „1
500——X„ 4½ „1
1,200——X„ 4½ „1
1,200——X„ 4½ „1
600—-X„ 4½ „1
400—-X„ 4½ „1
500——X„ 4½ „1
400—-X„ 4½ „1
600——X.. 4½ „1
3,000——X.. 4½ „1
700——X„ 4½ „1
2,000——X„ 4½ „
100——X„ 4½ „1
200—-X„ 4½ „1
500——X„ 4½ „1
900-—X„ 4½ „1
3,000——X„ 4½ „1
500——X„ 4½ „1
10,000——X„ 4½ „1
2,500—-X„ 4½ „1
300——X„ 4½ „1
42,000x2 tubes—X„ 4½ „1
8,200——X„ 4½ „1
5,000x2 tubes-X„ 4½ „1
6,800—-X„ 4½ „1
1,600——X„ 4½ „1
600——X„ 4½ „1
200——X„ 4½ „1
400——X„ 4½ „1
700xltube—X„ 4½ „1
12,000xl tube—X„ 4½ „1
6,300x2 tubesxl tubeX„ 4½ „1
6,200——X.. 4½ „1
400——X„ 4½ „1
1,100xltube—X„ 4½ „1
3,200xl tube—X„ 4½ „1
9,000xltube—X„ 4½ „1
900——X„ 4½ „1
4,500——X„ 4½ „1
900——X„ 4½ „1
1,200——X„ 4½ „1
650——X„ 4½ „1