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76
Smoke
Average readings from apparatus sited at Monck Street, and Churchill
Gardens.
By means of this apparatus a measured volume of air is drawn through
a filter paper which removes solid matter from it. The stain thereby
produced is compared with a standard, from which the amount of pollution
is calculated.
Micrograms per cubic metre
Month
Monck Street Churchill Gardens
January 260.1 262.2
February 215.2 210.5
March 108.7 107.4
April 84.1 94.1
May 43.9 41.8
June 32.8 31.2
July 31.0 365
August 31.7 38.6
September 60.5 70.9
October 71.7 80.9
November 97.5 112.4
December 150.4 221.6
Sequential Smoke Sampling Apparatus
As previously reported, the City Council is co-operating in the
investigation being carried out by the Department of Scientific and
Industrial Research into the relation between atmospheric pollution and
respiratory diseases. During 1962, in order to provide the information
required, it was necessary for the Council to purchase and install, at a
cost of approximately £55, a sequential smoke sampling apparatus which
examines and records at regular intervals the solid pollution in a measured
quantity of air.
The machine was put into use during much of January and February,
1963, during fog or weather showing a fog tendency. Further readings
were also taken during November and December, 1963. Where requested
by the Department of Scientific and Industrial Research, the calculated
results from these sample readings were supplied to them.