VI ADVERTISEMENT 



Mineral Resources ot the United States, 1886, by David T.Day. 1887. 8°. viii,813pp. Price 50 cents. 

 Mineral Resources of the United States, 1887, by David T.Day. 1888. 8°. vii, 832 pp. Price 50 cents. 

 Mineral Resources of the United States, 1888, by David T. Day. 1890. 8°. vii, 952 pp. Price 50 cents. 

 Mineral Resources of the United States, 1889 and 1890, by David T. Day. 1892. 8°. viii, 671 pp. 

 Price 50 cents. 

 Mineral Resources of the United States, 1891, by David T. Day. 1893. 8°. vii, 630 pp. Price 50 cents. 



In preparation : 

 Mineral Resources of the United States, 1892. 



The money received from tbe sale of these publications is deposited in the Treasury, and the Seer* 

 tary of the Treasury declines to receive bank checks, drafts, or postage stamps ; all remittances, there- 

 fore, must be by postal note or money order, made payable to the Chief CJerk of the U. S. Geological 

 Survey, or in currency, for the exact amount. Correspondence relating to the publications of the 

 Survey should be addressed 



To the Director of the 



United States Geological Survey, 



Washington, D. C 

 Washington, D. C, Auyust, 1S98. 



