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(ii) While pollution by smoke ( i.e. solid particles) appears to have decreased
in the No. 1 Smoke Control Area, the incidence of Sulphur Dioxide (gaseous
pollutant)there, is, unfortunately, as high as ever.
(iii) Pollution figures obtained from the Tate Library in South Lambeth Road
(Station No. 10) bear very little comparison with those from other stations
in comparable wind, weather and temperature conditions, but appear to be
entirely dominated by pollution from road traffic congregating at the
adjacent light controlled road junction.
(iv) Pollution figures at Heme Hill Library (Station No. 13) compare favourably
with those at Norwood Technical College (Station No. 12) except when the
wind is in the South East Quarter when, apparently, the railway sidings
at Heme Hill B.R. Station exert an influence.
(v) Continous periods of sunny weather, especially when winds are slight,
are no indication that atmospheric pollution figures will be low. Possibly
due to the increase of "pleasure motoring", at such times, pollution
figures are often disturbingly high. A period of settled rain, however,
presages very satisfactory conditions so far as the pollution stations are
concerned.