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 Kensington]
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April. | Illuminating Power in Standard Sperm Candles. | Amount of Impurity. | Max. | Illuminating Power in Standard Sperm Candles. | Amount of Impurity. | June. | Illuminating Power in Standard Sperm Candles. | Amount of Impurity. | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sulphuretted Hydrogen. | Ammonia per 100 feet, grains. | Sulphur per 100 feet, grains. | Sulphuretted Hydrogen. | Ammonia per 100 feet, grains. | Sulphur per 100 feet, grains. | Sulpheretted Hydrogen. | Ammonia per 100 feet, grains. | Sulphur per 100 feet, grains. | ||||||
1 | 22.1 | None | None | 17.0 | 1 | 21.9 | None | 0.2 | 16.6 | 1 | 21.3 | None | None | 17.9 |
2 | 23 0 | „ | „ | 13.7 | 2 | 21.5 | „ | 0.6 | 16.4 | 2 | 21 3 | „ | 0.4 | 19.1 |
3 | Not, received | ... | 4 | 20.9 | „ | None | 18.4 | 3 | 21.5 | „ | None | 18.2 | ||
4 | 22.1 | „ | 0.4 | 14.2 | 5 | 21.5 | „ | „ | 18.9 | 4 | 21.6 | „ | „ | 17.8 |
6 | Not received | ... | 6 | 22.0 | „ | „ | 17.4 | 5 | 22.0 | „ | „ | ... | ||
7 | 21.7 | „ | 2.4 | 16.8 | 7 | 21.4 | „ | 0.8 | 17.4 | 6 | Not received | ... | ||
8 | 21.5 | „ | 0.6 | 17.8 | 8 | 21.4 | „ | None | 20.2 | 8 | 22.0 | „ | „ | 17.8 |
9 | 22.5 | „ | 1.2 | 16.9 | 9 | 205 | „ | „ | 17.9 | 9 | 21.9 | „ | „ | ... |
10 | 22.2 | „ | ... | 17.2 | 11 | Not received | ... | 10 | 21.8 | „ | 0 8 | ... | ||
11 | 22.3 | „ | None | 172 | 12 | 21.5 | „ | ,, | 18.9 | 11 | 20.8 | „ | 1.2 | 17.7 |
13 | 22.7 | „ | 0.4 | 17.3 | 13 | 21.6 | „ | 1.0 | 1 .8 | 12 | 20.3 | „ | 0.5 | 17.8 |
14 | 21.0 | „ | 0.4 | 17.3 | 14 | 22.0 | „ | 0.8 | 16.7 | 13 | 20.7 | „ | 0.8 | 17.1 |
15 | 21.0 | „ | 1.4 | 17.1 | 15 | 22.2 | „ | 0.2 | 16.3 | 15 | 20.6 | „ | 1.0 | 17.3 |
16 | 22.9 | „ | 0.7 | 17.4 | 16 | 20.7 | „ | None | 17.9 | 16 | 20.8 | „ | 0.6 | 17.3 |
17 | 21.6 | „ | 0.4 | 19.0 | 18 | 21.2 | „ | 0.4 | 16.0 | 17 | 23.1 | „ | 0 6 | 16.9 |
18 | 21.2 | „ | 0.2 | 17.9 | 19 | 21.6 | „ | 0.4 | 17.3 | 18 | 21 .1 | „ | 0.5 | 16.1 |
20 | 9,2.2 | „ | 0.0 | 19.5 | 20 | 21.8 | „ | 0.8 | 17.8 | 19 | Not received | |||
21 | Not received | ... | 21 | 21.4 | „ | 0.6 | 17.7 | 20 | ||||||
22 | 22.5 | „ | 0.2 | 9.5 | 22 | Not received | ... | 22 | 21.4 | „ | 0.5 | 16.2 | ||
23 | 22.5 | „ | 1.4 | 18.7 | 23 | 21.7 | „ | 0.4 | 18.0 | 23 | 21.4 | „ | 1.0 | 17.4 |
24 | 22.2 | „ | 0.6 | 18.1 | 25 | Not received | ... | 24 | No return | |||||
25 | 23.0 | „ | 0.4 | 18.2 | 26 | 21.7 | „ | 0.6 | 18.4 | 25 | ||||
27 | 22.2 | „ | 0.0 | 18.0 | 27 | 21.7 | „ | 0.4 | 20.0 | 26 | ||||
28 | 22.0 | „ | 0.0 | 18.1 | 28 | 21.7 | „ | 0.6 | 19.9 | 27 | 21.4 | „ | 0.8 | 17.3 |
29 | 21.2 | „ | 1.0 | 15.4 | 29 | 22.0 | „ | 0.5 | 19.3 | 29 | 21.4 | „ | 0.5 | 17.3 |
30 | Not received | ... | 30 | 21.4 | „ | 0.6 | 18.3 | 30 | 21.3 | „ | 0.4 | 16.4 | ||
Mean | 22.04 | „ | 0.56 | 17.37 | Mean | 21.53 | „ | 0.39 | 17.97 | Mean | 21.28 | „ | 0.48 | 17.39 |