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
Islington 1895
[Report of the Medical Officer of Health for Islington, Parish of St. Mary ]
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TABLE XTV.—Analysis of Water for Quarter ending 28th September, 1895, by Dr. Wm. (Jrookes. (The results are stated in Grains per Imperial Gallon of 70,000 grains.)
| april. | may. | june. | average for quarter. | |||||
|---|---|---|---|---|---|---|---|---|
| Samples from Works. Grains. | Samples from Mains. (Average) Grains. | Samples from Works. Grains. | Samples from Mains. (Average) Grains. | Samples from Works. Grains. | Samples from Mains. (Average) Grains | Samples from Works. Grains. | Samples from Mains. (Average) Grains. | |
| Total Solid Matter per gall. | 22.90 | .. | 21.40 | .. | 21.20 | .. | 21.83 | .. |
| Chlorine „ | 1.224 | 1.296 | 1.224 | 1.296 | 1.296 | 1.272 | 1.248 | 1.288 |
| Equal to Chloride of Sodium ,, | 2.006 | 2.124 | 2.006 | 2.124 | 2.124 | 2.085 | 2.045 | 2.111 |
| Nitrogen as Nitrates ,, | 0.104 | 0.182 | 0104 | 0.170 | 0.118 | 0.156 | 0.108 | 0.169 |
| Ditto as Ammonia ,, | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 |
| Oxygen required to oxidise Organic Matter ,, | 0.011 | 0.018 | 0.015 | 0.019 | 0.023 | 0.014 | 0.016 | 0.017 |
| Degree of Hardness ,, | 15.26 | 15.00 | 15.47 | 15.40 | 15.47 | 15.54 | 15.40 | 15.31 |
| Ditto after boiling quarter of an hour ,, | 3.99 | .. | 4.90 | .. | 4.69 | 4.52 | ||
| Organic Carbon ,, | .. | 0.039 | .. | 0.049 | .. | 0.062 | .. | 0.050 |
| Organic Nitrogen „ | .. | 0.007 | .. | 0.009 | .. | 0.009 | .. | 0.008 |