GEOLOGICAL SURVEY PUBLICATIONS ON LEAD AND ZINC. 
Many papers relating to silver-lead deposits will be found included 
in the list on pages 90 and 01 of this bulletin. The principal other 
papers on lead and zinc, published by the United States Geological 
Survey, are the following: 
Bain, H. F., Van Hise, C. R., and Adams, G. I. Preliminary report on the 
lead and zinc deposits of the Ozark region [Mo., Ark. J. In Twenty-second Ann. 
Rep., Pt. II, pp. 28-22*. 1902. 
Clerc, F. L. The mining and metallurgy of lead and zinc in the United States. 
In Mineral Resources U. S. for 1882, pp. 358-386. 1888. 
Hofmann, H. O. Recent improvements in desilverizing lead in the United 
States. In Mineral Resources U. S. for 1883-84, pp. 402-47:5. 1885. 
Iles, M. W. Lead slags. In Mineral Resources U. S. for 1883-84, pp. 440- 
462. 1885. 
Winslow, A. The disseminated lead ores of southeastern Missouri. Bulletin 
No. 182. 81 pp. 1896. 
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