Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Croydon]
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No. Samples Taken. | Methylene Blue Test. | Phosphatase Test. | ||
---|---|---|---|---|
Not Satisfied. | Satisfied. | Not Satisfied. | Satisfied. | |
334 | 2 | 332 | 1 | 333 |
No. Samples Taken. | Turbidity Test. | ||
---|---|---|---|
Not Satisfied. | Satisfied. | ||
4 | Nil | 4 |