View report page

fuel used. It is estimated that 650 factories and industrial premises will have to
be circularised and it is hoped to collate the information from this survey early
in the New Year when a Clerk is appointed to the Clean Air Section. The survey
should indicate how far mechanical stokers have superseded hand-firing and the
extent to which oil has replaced coal and will provide valuable data on premises
and equipment in the borough likely to be affected by the seven year moratorium
before the Clean Air Act comes fully into operation in 1963.
Height of Chimneys.
When dealing with cases of prior approval, difficulty has been experienced
in some cases in obtaining adequate chimney heights. There is no specific legislation
in the Clean Air Act applicable to London governing the height of chimneys
and there are no provisions to alter the height of existing chimneys when additional
furnaces are installed. This will remain a difficult problem until the matter is
covered by legislation.
Atmospheric Pollutioq.
Two smoke/sulphur-dioxide recording stations have been set up in conjunction
with the Department of Scientific and Industrial Research, one at the Town Hall,
known as Station Poplar No.6, and the other at the Poplar Technical College, known
as Station Poplar No. 11.
A centre in the Borough is used for testing re-agents used in "sulphur"
recording.
A smoke telescope has been obtained, and a smoke reflectometer has been
-33-