VI ADVERTISEMENT. 



In ineparation : 



— A Geological Eeconnoissance in northwest Wyoming, liy Geo. H. Eldridge. 



— The Devonian System of eastern Pennsylvania and New York, by Chas. .S. Prosser. 



The Moraines of the Missouri Coteau and their attendant deposits, liy .James Edward Todd. 



— A Hibliograjihy of Paleobotany, by David White. 



STATISTICAL PAPERS. 



Mineral Resources of the United States [1882], by Albert Williams, jr. 1883. 8^. xvii,813pp. 

 Price 50 cents. 



Mineral Resources of the United States, 1883 and 1884, by Albert Williams, jr. 188.5. 8 \ xiv, 

 lOlfi pp. Price 60 cents. 



Mineral Resources of the United States, 1885. Division of Mining Statistics .and Technology. 

 188G. 8". vii, ,576 pp. Price 40 cents. 



Mineral Resources of the United States, 1886, by David T. Day. 1887. 8-^. viii, 813 pp. Price 

 50 cents. 



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

 50 cents. 



Mineral Resources of tlie United States, 1888, by David T. Day. ISilO. 8°. vii, 652 pp. Price 

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Mineral Resources of the United States, 1889 and 1890, by Daviil T. D;iy. 1892. 8°. viii, 671 pp. 

 Price 50 cents. 



Mineral Resources of the Ihiitcd States, 1891, by David T. D,iy. 1893. 8°. vii, 630 pp. Price 

 50 cents. 



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

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To TJiE Director of the 



United States Geological Survey, 



Washington, D. C. 

 Washington, D. C, March, 1S94. 



