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 Hornsey, Borough of]
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ATMOSPHERIC POLLUTION - MEASUREMENT OF SMOKE, SULPHUR DIOXIDE AND SOLID DEPOSITS
Smoke (milligrams per 100 cubic metres) | Sulphur dioxide (parts per 100 million parts of air) | Solid deposits (tons per sq. mile) | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Monthly average | Highest daily reading | Lowest daily reading | Monthly average | Highest daily reading | Lowest daily reading | ||||||||||||||||
(a) | (b) | (c) | (a) | (b) | (c) | (a) | (b) | (c) | (a) | (b) | (c) | (a) | (b) | (c) | (a) | (b) | (c) | (c) | (d) | (e) | |
January | 24 | 29 | 30 | 84 | 87 | 85 | 3 | 10 | 8.6 | 9.7 | 17. 5 | 37.4 | 30.0 | 58.0 | 1.1 | 1.4 | 3.6 | 16. 07 | 9.91 | 18.30 | |
February | 22 | 23 | 25 | 92 | 87 | 102 | 11 | 13 | 14 | 10.2 | 10.6 | 18.2 | 60.0 | 56. 0 | 86.7 | 2.6 | 3.2 | 5.6 | 7.63 | 7. 58 | 10.11 |
March | 12 | 16 | 16 | 38 | 37 | 39 | 4 | 8 | 6.2 | 6.7 | 8.8 | 16.7 | 13.6 | 19.9 | 2.3 | 3.2 | 4.2 | 16.62 | 13.63 | 26.09 | |
April | 8 | 10 | 11 | 16 | 22 | 23 | 3 | 3 | 4 | 5.0 | 5.5 | 7.0 | 15.3 | 12.0 | 20. 0 | 1.7 | 1. 5 | 2.9 | 13.26 | 11.26 | 17.25 |
May | 5 | 6 | 5 | 19 | 19 | 21 | 1 | 1 | 1 | 3.1 | 3.9 | 3.6 | 9.5 | 12.3 | 14. 0 | 1.2 | 1.4 | 0.2 | 4. 50 | 8.15 | 8.09 |
June | 4 | 4 | 3 | 9 | 10 | 7 | 1 | 1 | 1 | 3.0 | 3.5 | 2.1 | 6.9 | 10.1 | 3.8 | 1.2 | 1. 5 | 0. 5 | 12.02 | 8.06 | 12.93 |
July | 3 | 4 | 1 | 9 | 9 | 2 | 1 | 1 | 1 | 2. 5 | 2. 5 | 1.4 | 6.1 | 7.6 | 6.0 | 0.7 | 0. 5 | 0. 2 | 10. 46 | 7.75 | 12.00 |
August | 4 | 3 | 1 | 9 | 7 | 1 | 1 | 1 | 1 | 2.5 | 2.2 | 1.0 | 4.8 | 3.8 | 2. 5 | 0.6 | 0.9 | 0.2 | 9.34 | 7.76 | 10. 51 |
September | 5 | 4 | 1 | 13 | 12 | 1 | 1 | 1 | 1 | 3.6 | 2.7 | 1.7 | 13.8 | 10.7 | 5.4 | 0. 5 | 0.2 | 0.2 | 6.22 | 7.86 | 8.05 |
October | 10 | 11 | 2 | 18 | 23 | 5 | 3 | 4 | 1 | 4.2 | 3.9 | 3.0 | 14. 5 | 8.7 | 6. 0 | 0. 5 | 1.3 | 1.0 | 13.02 | 10. 77 | 16.91 |
November | 20 | 25 | 9 | 39 | 59 | 27 | 6 | 10 | 1 | 6.1 | 4.9 | 8.6 | 40.1 | 31.3 | 31.3 | 0.5 | 1.6 | 2,3 | 11. 53 | 25. 20 | 20. 07 |
December | 14 | 18 | 5 | 38 | 43 | 9 | 6 | 9 | 1 | 3.5 | 2.7 | 5.2 | 13.1 | 4.8 | 14.7 | 1.7 | 1.4 | 2.3 | 15.84 | 9.47 | 16.86 |
Sites: (a) Fortis Green Depot. (b) Disinfecting Station. (c) Town Hall. (d) Highgate Depot, North Hill.
(e) Electricity Sub-Station, Hampden Road.