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atmosphere could be achieved in the near future there would still
be relatively large quantities of sulphur dioxide and carbon
monoxide for these dangerous gases are still produced with smokeless
combustion of such fuels as high and low temperature cokes
and fuel oils. Up to the moment science has not been able to
produce really economic methods of preventing these gases being
discharged to atmosphere.
10. RODENT CONTROL. The Rodent Control Service
which is confined to dealing with infestations by rats and mice
has continued to operate during the year under review. A staff
of three "Ministry trained" assistants has performed the necessary
work. No charge is made to householders in respect of
treatment at private dwelling houses but in all other cases a
charge is made on a time and materials basis. 905 premises were
found to be infested and 864 premises were satisfactorily treated.
The following details of sewer treatment have been provided
by the Borough Engineer and Surveyor. In March, 1953, a 10%
test bait of sewer manholes was carried out. 393 manholes were
baited and there were 6 complete "takes" and 68 partial "takes".
In the treatment which followed 172 manholes were baited when
there were 6 complete "takes" and 107 partial "takes." The
corresponding figures for the 15th Maintenance Treatment carried
out in October, 1953, were—manholes baited 330, complete "takes"
14, partial "takes" 114.
No new developments in poisoning technique were introduced
during the year but Warfarin which was used very extensively
during 1952/53 has continued to produce good results.
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