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
Chislehurst 1956
[Report of the Medical Officer of Health for Chislehurst]
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Monthly deposit in tons per square mile during 1956.
| Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (in rain in inches) | 3.00 | 0.11 | 0.97 | 1.41 | 0.48 | 2.92 | 3.63 | 3.60 | 1.98 | 1.53 | 0.56 | |
| pH Value | 4.88 | 6.50 | 7.08 | 6.60 | 7.54 | 5.34 | 7.16 | 6.64 | 7.32 | 6.10 | 5.42 | 4.68 |
| Total water in soluble matter | 5.87 | 5.34 | 7.57 | 7.95 | 6.71 | 8.02 | 7.28. | 4.44 | 5.84 | 6.24 | 4.58 | |
| Soluble in CSs | 0.03 | 0.09 | 0.12 | 0.03 | 0.11 | 0.07 | 0.11 | 0.12 | 0.04 | 0.08 | 0.07 | 0.05 |
| Ash | 3.71 | 4.01 | 6.47 | 5.82 | 5.28 | 4.68 | 5.67 | 5.44 | 3.46 | 4.41 | 4.56 | 3.26 |
| Other combustible matter | 2.13 | 1.24 | 1.62 | 1.72 | 2.56 | 1.96 | 2.24 | 1.71 | 0.95 | 1.53 | 1.60 | 1.28 |
| Total water soluble matter | 6.85 | 4.90 | 10.71 | 7.79 | 4.80 | 5.57 | 7.52 | 8.86 | 7.45 | 6.24 | 5.37 | 4.77 |
| Ca + + | 1.21 | 0.77 | 1.38 | 0.94 | 0.54 | 1.48 | 1.48 | 1.61 | 1.01 | 0.81 | 0.67 | |
| CI' | 1.75 | 0.74 | 0.79 | 0.79 | 0.47 | 0.74 | 0.94 | 1.14 | 0.60 | 0.84 | 0.81 | 1.21 |
| SO"4 | 3.48 | 1.44 | 4.17 | 3.24 | 1.60 | 2.30 | 2.93 | 3.26 | 3.04 | 2.63 | 1.77 | |
| Total solids | 12.72 | 10.24 | 18.91 | 15.36 | 12.75 | 12.28 | 15.54 | 16.14 | 11.89 | 12.08 | 11.61 | 9.34 |
| Sulphur dioxide (milligrams of sulphur trioxide collected per day by 100 sq. cms. of Batch A lead peroxide) | 2.05 | 2.80 | 1.49 | 1.30 | 1.17 | 1.04 | 0.64 | 0.57 | 0.67 | 1.60 | 2.58 | 1.49 |