00765cam a22002411 4500 gs 17000189 DLC 20260227111321.0 781116s1917 dcua f000 0 eng gs 17000189 (OCoLC)4379994 DLC NUtSU DLC premarc TN263 .E48 Emmons, William H. (William Harvey), 1876- The enrichment of ore deposits / by William Harvey Emmons. Washington : Govt. print. off., 1917. 530 p. : ill., vii pl (1 fold) diagr., ; 24 cm. U. S. Geological survey. Bulletin 625. At head of title: Dept. of the interior. Bibliography: p. 20-33. Ore deposits. 25750 25750