Abstract
For many years silicosis has been accepted as a definite clinical entity occurring in workers exposed to siliceous dust in various mining occupations. Anthracosilicosis in employees of anthracite mines has long been recognized, but one is surprised at the paucity of mention in medical literature of nodular or fibrotic pulmonary changes in bituminous coal miners. It is a well known fact that dusts, both organic and inorganic, are present in variable concentrations in the mining and preparation of bituminous coal. Gardner 1 in 1938, in the evaluation of irritating effects of various minerals on the tissue of experimental animals, demonstrated that bituminous coal dust was irritating as well as anthracite dust. Cummins and Sladden 2 in 1930 concluded that anthracosis was not a simple condition, as thought by many, but was a form of pulmonary fibrosis, usually due to an associated silicosis. Clark and Moffett, 3 in a recent study
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