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 Westminster, City of]
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To face page 108.
CHART "B."
ATMOSPHERIC POLLUTION.
SULPHUR GAS IN THE ATMOSPHERE.
Variations throughout the year of SO2 measured by weight, with corresponding readings of rainfall, wind and visibility.
Weight of S02 —
Visibility
Rainfall—TR. = under 0.1 mm. (average is 1.2 mm.).
VAR—Wind direction variable.
DATE
6.4 11.12 17.18 24.25.31.1 8.9 14.15 21.22 28.1 7.8 14.15 21.22 28.29 4.5 11.12 18.19 25.26 2.3 9.10 16.17 23.24 30 31 6.7 13.14 20.21 27.28 4.5 11.12 18.19 25.26 1.2 8.9 15.16 22.23 29.30 5.6 12.13 1920 26.27 3.4 10.11 17.18 24.25 31.1 7.8 14.15 21.22 28.29 5.6 12.13 19.20 26.27
1 JANUARY,FEBRUARY, MARCH , APRIL , MAY , JUNE , JULY , AUGUST , SEPTEMBER, OCTOBER,NOVEMBER, DECEMBER
1955
WIND
DIRECTION
NW SW NE SW W NEW SW S E VAR SW NW NV VAR. SW N VAR NE NE NE E SW SW SW SW SW NE W NE S VAR SW SW.SW SW SW SW SW SE SW E SW N SW N SWSW NE N SW
RAINFALL - 5 0.1 1.2 -TR - 5- - - - 3 2 2 7.2 - TR. TR - 02 12 1.0 1.0 - - 3.5 5 - - - - - - - - -4 -8 TR0.2 0.5 11.4 2 - 0.3 8 26 1.0 0.1 TR.TR - 0-7 6 MILLIMETRES