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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Continued from previous page...

Plate CountColiform Reaction (in 1/10 ml.)Bacterium coli (in 1/10 ml.)Satisfactory*PassableNot PassableMethylene Reduction timeBlue Test Grade
400--XNot in 4½ hours1
800--X„ 4½ „1
300—-X„ 4½„1
800--X„4½„1
100-X„ 4½ „1
5,800--X„ 4½ „1
12,000--X„ 4½„1
500--X„ 4½„1
5,800--X„ 4½ „1
1,800--X„ 4½ ,,1
6,300--X„ 4½ „1
300--X„ 4½ „1
100--X„ 4½ „1
600--X„ 4½ „1
100--X„ 4½ „1
800--X„ 4½ ,,1
100--X„ 4½ „1
2,700xl tubexl tubeX„ 4½„1
3,000—_XTest not practicable
5,300x2 tubes_XIn 4 hours2
5,800x2 tubes—X„ 4 „2
60,000_-X„ 4 „2
10,000--X„ 4 „2
5,800xl tube-X„ 4 „2
12,000xl tube-X„ 4 „2
8,000x2 tubes-X„ 4 „2
12,000x3 tubes-X„3½ „2
7,200—-X„3 ½ „2
1,700x2 tubes-X,, 3½„2
7,500xl tube-X„ 3½ „2
4,200—-X„ 3½„2
12,000xltube-X„3½ „2
6,200—-X„ 3½ „2
30,000—-X„ 3 „2
8,000x2 tubes-X32
5,200x2 tubes-X„ 3 „2
700x3 tubes-X„ 2½ „2
37,000x2 tubes-X„ 2½ „2
18,000x3 tubes-X„ 2½ „2
700xl tube-X„ 2½ „2
25,000x3 tubes-X„ 2½ „2
180,000x3 tubes-X„ 2 „3
250,000_-x„ 2 „3
42,000x3 tubesx2 tubesX„ 2 „3
28,000x2 tubes_X„ 1½ „3
17,000x2 tubesxl tube_„ l½ „3
240,000x3 tubesX„ 1 „3
56,000x3 tubes_X„ 1 „3
9,000x3 tubes_X„ 1 „3
14,000x3 tubesx„ 1 „3
180,000x3 tubes}f„ ½ „3
250,000xl tubex„ ½ „3
12,000x3 tubes_x04
72,000x3 tubesx„ 0 „4
80,000xl tubex„ 0 „4
140,000x„ 0 „4
120,000x3 tubes_X„ 0 „4