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capable of being operated continuously without emitting
smoke when burning fuel of a type for which they were
designed; the applications were accordingly approved by
the Council.
Atmospheric Pollution
Investigation of the degree of atmospheric pollution
was continued throughout the year with the volumetric
instruments sited at the Town Hall and at 475 Lordship
Lane, and the deposit gauge and lead peroxide apparatus
on the roof of the Queen's Road Centre, St.Mary's Road,
Peckham. The results obtained from these instruments,
which are shown in graph form on pages 50/53 are forwarded
monthly to the Department of Scientific and Industrial
Research.
With regard to the two volumetric instruments, it
has been the practice to assess the amount of pollution
by visual comparison of the filter papers with a scale of
shades. In December, however, a letter was received from
the Department of Scientific and Industrial Research
indicating that this method of assessment was not scientifically
accurate and that after March 1961 no further
records made in this way could be accepted. It was
recommended that the stains on the filter papers should
be read by a reflectometer, and the Department offered to
arrange to do this at its Warren Spring Laboratory,
Stevenage, Herts, if the Council so desired. In order,
however, to standardise the results it was decided to
purchase a reflectometer for use in the Public Health
Department.
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