36 A Bibliography of the Geology, etc., of California. 



Report of 1880. Statistics of production of the precious metals 



in the United States for 1880; by H. C. Burchard, Director 



of U. S. Mint. Washington, 1881. 443 pp. 



Contains chapter on California mines, by W. A. Skidraore and 

 Chas. G. Yale; Contributions to California geology, by Melville 

 Attwood ; Auriferous gravels, by Chas. G. Yale. 



Report of 1881; by H. C. Burchard, Director of U. S. Mint. 

 Washington, 1882. 765 pp. 



Contains chapter on California mines, by A. M. Lawver ; Milling of 

 gold quartz, by Melville Attwood ; Mining machinery in California, 

 by Chas. G. Yale ; Gold from sulphurets, by Melville Atwood ; Aurif- 

 erous gravels of California, by John Hays Hammond ; Old river-beds 

 of the Sierra Nevada of California, by Jas. J. McGillivray. 



Report of 1882; by H. C. Burchard, Director of U. S. Mint. 

 W^ashington, 1883. ' 873 pp. 



Contains chapter on California mines, by J. R. Hardenburg ; Placer 

 gold in California, by Henry G. Hanks. 



Report of 1883; by H. C. Burchard, Director of U. S. Mint. 



Washington, 1884. 858 pp. 



Contains chapter on California mines, by J. R. Hardenburg ; Con- 

 dition of mining in California, by W. A. Skidmore ; Drift mining in 

 California, by R. L. Dunn. 



Report of 1884; by H. C. Burchard, Director of U. S. Mint. 



Washington, 1885. 644 pp. 



Contains a chapter on California mining, by A. M. Lawver ; Gold 

 and silver mining in California, past, present, and prospective, by 

 W. A. Skidmore ; Forms in which gold occurs in nature, by W. P. 

 Blake. 



Reports of 1885, 1886, 1887, 1888; by Jos. P. Kimball, Director 



of U. S. Mint. 



In each of these reports the chapter on California mining is by 

 Israel Lawton. 



Reports of 1889, 1890, 1891, 1892; by E. O. Leech, Director of 



U. S. Mint. 



In each of these reports the chapter on California mining is by 

 Chas, G. Yale, except in 1892, when it was by W. H. Dimond. 



Reports of 1893, 1894, 1895; by R. E. Preston, Director of 

 U. S. Mint. 



In each of these reports the chapter on Californiii milling is by 

 Chas. G. Yale. 



