VI ADVERTISEMENT. 



Mineral Resources of the United States, 1886, by Uavid T. Day. 1887. 8°. viii, 813 pp. Price 

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

 .'>0 cents. 



Mineral Resources of the United States, 1888, by David T. Day. 1890. 8^. vii, 65L' pp. Price 

 50 cents. 



Mineral Resources of the United States, 1889 and 1890, l>y David T. Day. 1892. 8'^. viii, f.7l4ip. 

 Price 50 cents. 



Mineral Resources of the United States, 1891, by David T. Day. 1893. 8-. vii, KW pp. Price 

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The money received from the sale of these publications is deposited in the Trea-sury, and the 

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Wasiiinoton, D. C. 

 Washington, D. C, .liili/, 1893. 



