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60
Atmospheric Pollution
Investigation into the atmospheric pollution in the City was continued
during the year at three sites, Mayfair, Pimlico and Charing Cross,
where deposit gauges, which measure the deposited pollution, and lead
peroxide cylinders, which measure the sulphur activity, are sited. The
following table gives the results of the monthly analyses, and shows
separately the amounts of insoluble and soluble constituents.
Monthly deposits of impurities—tons per square mile.
Month.
Mayfair.
Pimlico.
Charing Cross.
Insol.
Sol.
Total.
Insol.
Sol.
Total.
Insol.
Sol.
Total.
January 12.27 24.75 37.02 14.49 24.16 38.65 23.40 21.97 45.37
February 11.25 18.65 29.90 13.59 21.34 34.93 23.00 23.23 46.23
March 16.16 12.62 28.78 24.16 14.87 39.03 18.09 15.90 33.99
April 13.61 10.64 24.25 11.07 6.58 17.65 13.44 8.83 22.27
May 14.12 13.02 27.14 15.50 12.82 28.32 13.60 9.99 23.59
June 12.99 9.75 22.74 14.96 7.58 22.54 12.94 11.19 24.13
July 10.23 10.77 21.00 10.97 13.49 24.46 11.45 8.50 19.95
August 6.34 15.17 21.51 10.73 19.16 29.89 9.62 13.48 23.10
Sept. 8.18 14.01 22.19 9.83 22.18 32.01 10.55 17.89 28.44
Oct. 10.74 20.87 31.61 13.99 20.54 34.53 15.93 15.93 31.86
Nov. 9.41 14.22 23.63 11.27 13.39 24.66 18.09 16.19 34.28
Dec. 12.07 11.80 23.87 30.00 14.63 44.63 19.85 14.90 34.75
Estimation of sulphur activity by the lead peroxide method
The cylinders for the estimation of sulphur activity are situated at
Alhambra House, Farm Street Depot and Bessborough Street Clinic.