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gauge for collecting soluble and insoluble deposits and a lead peroxide
apparatus for measuring the sulphur content of the air. Readings are
taken at each station at the end of each month.
In addition to the above mentioned stations, the Council have
established three smoke measuring stations as follows :-
(1) Public Health Department, Hornton Street, W.8.
(2) Public Library, Ladbroke Grove, W.10.
(3) L.C.C. Welfare Centre, Redcliffe Street, S.W.10.
The equipment at the public health department consists of
a smoke filter and a hydrogen peroxide bubbling apparatus. The smoke
filter measures the daily concentration of smoke suspended in the
atmosphere, and the hydrogen peroxide bubbler extracts the sulpur dioxide
content of the atmosphere. Readings are taken each day, and results are
averaged to produce figures for each calender month.
The equipment at the public library and the Welfare Centre
consists of smoke filters only. Measurements are taken three times a
week, and daily and monthly averages are calculated from the results.
All information obtained is forwarded each month to the
Director of Observations at the Fuel Research Station of the Department
of Scientific and Industrial Research, for correlation with the results
obtained from other sites throughout the country.