PULMONARY ASBESTOSIS

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Abstract
One of the conspicuous and interesting features of the pulmonary condition resulting from the inhalation of asbestos dust by miners and mill workers in this material is the occurrence of certain curious bodies in the lungs and peribronchial lymph nodes and frequently in the sputum. These objects have been sufficiently described,1but it is relevant here to review briefly their characteristics. They measure from about 10 to more than 100 microns in length and from about 1 to 12 microns in thickness and are composed of a central translucent fiber or needle crystal, the asbestos crystal, with an enveloping shiny golden or brownish substance constructing various architectural figures. The whole object may be a rod with smooth blunt ends or, more often, with one or both extremities in a single rounded knob or a clump of such knobs, reminding one of the fruit body of Aspergillus. Frequently the shaft

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