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 Stoke Newington, The Metropolitan Borough]
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20.
LEAD PERIOXIDE APPARATUS - TABLE 2
Month | Mg.of SO3/ day collected by 100 sq. cm. of Battth A Pbo2. (louvered cover) |
---|---|
January | 3.90 |
February | 3.20 |
March | 3.50 |
April | 2.70 |
May | 1.20 |
June | 1.20 |
July | 1.01 |
August | 1.00 |
September | 1.20 |
October | 2.10 |
November | 3.30 |
December | 3.40 |
DAILY SMOKE FILTER - TABLE 3 (Smoke in milligrammes/100 cubic metres)
Month | Average Reading | Highest Reading | Lowest Reading |
---|---|---|---|
January | 61 | 145 | 22 |
February | Apparatus Defective-Insufficient Readings | ||
March | 10 | 51 | 21 |
April | 25 | 34 | 16 |
May | 15 | 32 | 6 |
June | 13 | 31 | 2 |
July | 14 | 33 | 2 |
August | 11 | 32 | 2 |
September | 17 | 43 | 5 |
October | 24 | 104 | 5 |
November | 41 | 141 | 12 |
December | 36 | 88 | 12 |