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ATMOSPHERIC POLLUTION
Sampling of solid deposits in the atmosphere was continued during
1955, and the readings given on the three gauges in Hornsey are shown
in the table and graph following these notes. The general picture
follows that shown in the previous three years during which these tests
have been carried out. Apart from the information obtained locally
concerning the comparative pollutions at various points in the Borough
these gauges play a part in the sampling and testing of the atmosphere
which is taking place all over the country by local authorities and
co-ordinated by the Department of Scientific and Industrial Research.
The three sites which have been used for four years were chosen
in Hornsey in the following manner:—
Site (b) lies to the North-West of the railway engine sheds in a part
of the Borough which is suffering pollution and nuisance alleged to be
attributable to the railway engines and the coaling sheds. This site
was chosen as it was conveniently placed in the line of the prevailing
wind
Site (c) is approximately 400 yards to the west of site (b) and was
chosen to give an indication of the extent of spread of the pollution.
Site (a) on the roof of the Town Hall was selected as a "control" site.
These gauges collect rain and any particles of matter which fall on
the site and each month the contents are analysed thus indicating the
pollution of the atmosphere by solid matter.
In addition to this the Council has decided to instal apparatus for
the measurement of smoke and sulphur dioxide. This will be reported
on in the report for 1956.
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