When values obtained in 1953-54 for the combined concentrations of the " P " constituents in 17 towns in Lancashire (excluding Liverpool which has been used in the present study), Cheshire and West Yorkshire are extracted from Tables II and VII of the paper published in 1960 (Stocks, 1960) and correlated with the standardised death rates of males from lung cancer in 1950-53, as given in Table III of that paper, the result is a coefficient of 0-785 which is highly significant.
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Recent epidemiological studies of lung cancer mortality cigarette smoking and air pollution, with discussion of a new hypothesis of causation.
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