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 London, City of ]
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TABLE II — Results obtained in 1968 of the daily observations of the concentration of SMOKE by the volumetric method
| MONTH | Rainfall collected in deposit gauge at Guildhall | Public Services Building | Snow Hill Police Station | |
|---|---|---|---|---|
| Equivalent to | Monthly Average | Monthly Average | ||
| Millimetres | Inches of Rain | Microgrammes per cu. metre | Microgrammes per cu. metre | |
TABLE III — Results obtained in 1968 of the measurement of SULPHUR DIOXIDE by the volumetric method
| MONTH | Rainfall collected in deposit gauge at Guildhall | Public Services Building | Snow Hill Police Station | ||
|---|---|---|---|---|---|
| Equivalent to | Monthly Average | ||||
| Millimetres | Inches of Rain | Microgrammes per cu. metre | |||