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This authority continued to be represented on the following bodies:—
National Society for Clean Air.
Standing Conference of Co-operating Bodies in the Investigation
of Atmospheric Pollution (D.S.I.R.).
London and Home Counties Clean Air Advisory Council.
Exhibitions
The mobile exhibition of the Solid Smokeless Fuel Federation was
sited within smoke control area No. 3 from the 2nd-7th July, 1962.
Considerable interest was shown by residents. This is a valuable service
provided by the Federation, particularly as the only cost to the authority
is a small amount of publicity.
During September, the department contributed a Clean Air Exhibit
to the Silver Jubilee Exhibition in the Council Chamber.
Rodent Control
Two treatments of the sewers were carried out during the year 1962,
the first being restricted to those areas showing persistent takes in earlier
treatments, and the second a treatment over the whole borough.
It will be seen from the following table that the second treatment has
revealed a considerable re-infestation. This is disappointing as it had
been hoped that the use of Warfarin in addition to Arsenic and Zinc
Phosphide would effectively control and reduce the infestation. It
would appear therefore that consideration will have to be given to using
one of the more recently introduced poisons, such as "1080." Reports
from other authorities indicate that this poison, which requires expert
handling, is giving satisfactory results.

Warfarin with mould inhibitor was used for the first treatment and
Zinc Phosphide for the second.
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