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December 16, 1922


JAMA. 1922;79(25):2087-2088. doi:10.1001/jama.1922.02640250041017

There are so many dusty trades and smoky cities that pneumoconiosis is a subject of more significance than its literature would indicate. Recently there has been a greatly increased interest in the matter of the effects produced by the inhalation of dust, with numerous investigations by both the statistical and the experimental methods. This awakened interest has been shared by those having to do with industrial hygiene and by students of tuberculosis, who have commonly approached the subject from different directions. Clinical and statistical observations seem to indicate that the effects of dust inhalation depend chiefly on the character of the dust, and secondarily on the duration of the exposure. It has been suggested that the most injurious type of dust is one with hard, sharp cornered and insoluble particles; hence silicious dusts, such as are present in granite quarries and certain sorts of mines, are particularly harmful. Occasionally the