01278cam a22002651  4500001001300000003000400013005001700017008004100034010001700075035002000092040005100112050002500163100005900188245010400247260004300351300004600394490011600440500013700556500005600693500014900749504003800898650001000936650004800946650001800994l  22000227 DLC20260227111528.0890419s1922    dcua     b   f000 0 eng c  al  22000227   a(OCoLC)19569396  aU.S. Dept. of Labor. LibrarycPPCPdOCoLCdDLC00aHD8051b.A62 no. 2931 aHoffman, Frederick L.q(Frederick Ludwig),d1865-1946.14aThe problem of dust phthisis in the granite-stone industry,cby Frederick L. Hoffman ... May, 1922.  aWashington,bGovt. print. off.,c1922.  avi, 178 p.bincl. tables, diagrs.c23 cm.0 aBulletin of the United States Bureau of labor statistics ;vno.  293.aIndustrial accidents and hygiene series.  aAt head of title:  U.S. Department of labor, James J. Davis, secretary. Bureau of labor statistics, Ethelbert Stewart, commissioner.  aIssued also as House doc. 275, 67th Cong., 2d sess.  aPrevious investigations into the dust hazard of certain trades issued as Bulletins nos. 79, 82, and 231 of the U.S. Bureau of labor  statistics.  a"List of references": p. 163-167. 0aDust. 0aGranite industry and tradexHealth aspects. 0aTuberculosis.