01307cam a22002771 4500 l 22000227 DLC 20260227111528.0 890419s1922 dcua b f000 0 eng c l 22000227 (OCoLC)19569396 U.S. Dept. of Labor. Library PPCP OCoLC DLC HD8051 .A62 no. 293 Hoffman, Frederick L. (Frederick Ludwig), 1865-1946. The problem of dust phthisis in the granite-stone industry, by Frederick L. Hoffman ... May, 1922. Washington, Govt. print. off., 1922. vi, 178 p. incl. tables, diagrs. 23 cm. Bulletin of the United States Bureau of labor statistics ; no. 293. Industrial accidents and hygiene series. At head of title: U.S. Department of labor, James J. Davis, secretary. Bureau of labor statistics, Ethelbert Stewart, commissioner. Issued also as House doc. 275, 67th Cong., 2d sess. Previous investigations into the dust hazard of certain trades issued as Bulletins nos. 79, 82, and 231 of the U.S. Bureau of labor statistics. "List of references": p. 163-167. Dust. Granite industry and trade Health aspects. Tuberculosis. 35648 35648