London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Walthamstow 1948
[Report of the Medical Officer of Health for Walthamstow]
This page requires JavaScript
Continued from previous page...
| Plate Count | Old Standard Test | Not Pass able | New (Provisional) Test Methylene Blue Test | ||||
|---|---|---|---|---|---|---|---|
| Coliform Reaction (in 1/10 ml.) | Bacterium coli (in 1/10 ml.) | Very satisfactory | Passable | ||||
| Reduction time | Grade | ||||||
| 15,000 | - | - | X | In 3½ hours | 2 | ||
| 3,000 | - | - | X | „3½ „ | 2 | ||
| 2,000 | - | - | „ 3½ „ | 2 | |||
| 1,000 | - | - | X | „ 3 „ | 2 | ||
| 6,000 | - | - | X | „ 3 „ | 2 | ||
| 40,000 | *3 tubes | - | X | ,, 3 ,, | 2 | ||
| 8,600 | *2 tubes | - | X | „ 3 „ | 2 | ||
| 120,000 | — | - | X | „ 3 „ | 2 | ||
| 60,000 | *3 tubes | - | X | „ 3 „ | 2 | ||
| 20,000 | *3 tubes | - | X | „ 2½ „ | 2 | ||
| 40,000 | — | — | X | „ 2½ „ | 2 | ||
| 9,800 | — | - | X | „ 2½ „ | 2 | ||
| 8,000 | *3 tubes | - | X | „ 2½ „ | 2 | ||
| 20,000 | * 3 tubes | - | X | „ 2½ „ | 2 | ||
| 7,600 | *1 tube | - | X | „ 2½ „ | 2 | ||
| 5,800 | *2 tubes | - | X | „ 2½ „ | 2 | ||
| 50,000 | * 3 tubes | - | X | „ 2½ „ | 2 | ||
| 15,000 | *3 tubes | - | X | „ 2½ „ | 2 | ||
| 8,000 | *1 tube | — | X | „ 2½ „ | 2 | ||
| 15,000 | *3 tubes | - | X | „ 2 „ | 3 | ||
| 100,000 | *3 tubes | - | X | „ 2 „ | 3 | ||
| 5,000 | *2 tubes | - | X | „ 2 „ | 3 | ||
| 7,500 | *3 tubes | - | X | „ 14 „ | 3 | ||
| 6,000 | * 3 tubes | — | X | „ 1½ „ | 3 | ||
| 26,000 | *3 tubes | - | X | ,, 1½„ | 3 | ||
| 18,000 | — | - | X | „1½„ | 3 | ||
| 13,000 | *2 tubes | — | X | ,, 1½ „ | 3 | ||
| 20,000 | *3 tubes | — | X | „ 1 „ | 3 | ||
| 18,000 | *2 tubes | — | X | „ 1 „ | 3 | ||
| 45,000 | *3 tubes | - | X | ,, ½ „ | 3 | ||
| 250,000 | — | — | X | „ ½ ,, | 3 | ||
| 59,000 | *3 tubes | - | X | „ 0 „ | 4 | ||
| 240,000 | *3 tubes | - | X | ,, 0 „ | 4 | ||
| 2,500,000 | *3 tubes | - | X | ,, 0 „ | 4 | ||
| 48,000 | *2 tubes | — | X | „ 0 „ | 4 | ||
| 180,000 | *3 tubes | *3 tubes | X | „ 2½ „ | 2 | ||
| 400,000 | *3 tubes | * 3 tubes | X | ,, 0 „ | 4 | ||
| 15,000 | *3 tubes | *3 tubes | X | „ 0 „ | 4 | ||
| 4,000 | *3 tubes | *2 tubes | X | „ 0 „ | 4 | ||
By the old test, of a total of 61, 54 are in a category not less
than 'passable," whereas by the new (Provisional) test only 41
were classified in Grades 1 and 2.