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20.
ATMOSPHERIC POLLUTION
The Department of Scientific and Industrial Research have organised
a national survey of air pollution, based on about 100 local authorities
of al 1 types throughout the country,, This survey will be based on the
modern volumetric apparatus for measuring daily smoke and sulphur dioxide.
The deposit gauge and lead peroxide cylinder are now thought to have a
limited usefulness, mainly for monitoring particular local sources of
pollution. For this reason, the use of these two instruments was discontinued
at the end of 1961, the readings for the year are shown in
the tables.
The continuity of daily volumetric readings had to be broken in
July because of the demolition of the Disinfecting Station at the Old
Town Hall, and the instrument was set up at the new garages at Edward's
Lane. With the difference in location and surroundings, it is impossible
for any valid comparisons to be drawn from the readings for 1961.
The tables show the results for the year, and the situation of the instrument.