For the past ten years this country has seen marked scientific interest in the dusty lung diseases. This has led to numerous publications, trials, conflicting testimony, legislative enactments, theories and alleged palliatives. Slowly there emerge the significant facts. This book is a record of the accrued substantial observations made with regard to the two chief dusty lung diseases, silicosis and asbestosis. Its able editor, rather than author, Dr. Lanza, participated in the first well planned investigation of silicosis in this country near the year 1915, carrying out activities in the tristate lead and zinc mining district in the vicinity of Joplin, Mo. Other contributors are Drs. Sayers, Prendergrass, Gloyne, Gardner and Middleton. All have participated extensively in many investigations of dusty lung diseases. They discuss the history of silicosis and asbestosis, clinical aspects, x-ray diagnosis, chemical and experimental pathology, preventive measures, legislation, public health and economic aspects. While all sections