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 1949

[Report of the Medical Officer of Health for Walthamstow]

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Plate CountOld Standard TestNew (Provisional) Test Methylene Blue Test
Coliform Reaction in 1/10 ml.)Bacterium coli (in 1/10 ml.)Very satis-factoryPass-ableNot Pass' able
Reduction timeGrade
5,600——X„ 4½ „1
900——X„ 4½ „1
400——X„ 4½ „1
300——X„ 4½ „1
300——X„ 4½ „1
600——X„ 4½ „1
500——X„ 4½ „1
100——X„ 4½ „1
3,000——X„ 4½ „1
1,500——X„ 4½ „1
3,000xl tube—X„ 4½ „1
2,400——X„ 4½ „1
3,500——XIn 4 „2
9,200——X„ 4 „2
18,000——X„ 4 „2
26,000——X„ 4 „2
80,000——X„ 4 „2
12,000——X„ 4 „2
7,000x3 tubes—X„ 4 „2
1,500xl tube—X„ 4 „2
4,000x2 tubes—X„ 4 „2
6,500x3 tubes—X„ 4 „2
9,800x3 tubes—X„ 4 „2
32,000x3 tubes—X„ 4 „2
20,000x3 tubes—X„ 4 „2
130,000——X„ 3½ „2
9,000x3 tubes—X„ 3½ „2
15,000——X„ 3½ „2
14,000——X„ 3½ „2
36,000x3 tubes—X„ 3½ „2
23,000x3 tubes—X„ 3½ „2
50,000x3 tubes—X„ 3 „2
2,000x3 tubes—X„ 3 „2
90,000x3 tubes—X„ 3 „2
1,700xl tube—X„ 3 „2
8,000x3 tubes—X„ 3 „2
38,000x3 tubes—X„ 3 „2
4,500——X„ 2½ „2
180,000——X„ 2½ „2
12,000——X„ 2½ „2
90,000x3 tubes—X„ 2½ „2
36,000x3 tubes—X„ 2½ „2
22.000x3 tubes—X„ 2½ „2
26,000x3 tubes—X„ 2½ „2
80,000x3 tubes—X„ 2½ „2
7,000x3 tubes—X„ 2½ „2
30,000——X„ 2½ „2
5,000——X'„ 2½ „2
25,000x3 tubes—X„ 2½ „2
12,000xl tube—X„ 2½ „2
140,000x3 tubes—X„ 2 „3
40,000x3 tubes—X„ 1½ „3
35,000x2 tubes—X„ 1½ „3
120,000x3 tubes—X„ 1 „3
250,000x3 tubes—X„ 1 „3
90,000x3 tubes—X„ 1 „3
80,000x3 tubes—X„½„3