VI ADVERTISEMENT. 
119. A Geological Reconnoissance in Northwest Wyoming, by George Homans Eldridge. 1894. 
8°. 72 pp. Price 10 cents. 
120. The Deyonian System of Eastern Pennyslvania and New York, by Charles 8. Prosser. 1894. 
8°. 81pp. 2pl. Price 10 cents. 
121. A Bibliography of North American Paleontology, by Charles Rollin Keyes. 1894. 8°. 251 
pp. Price 20 cents. 3 
122. Results of Primary Triangulation, by Henry Gannett. 1894. 8°. 412 pp. 17 pl. Price 
25 cents. 
123. A Dictionary of Geographic Positions, by Henry Gannett. 1895. 8°. 183 pp. 1pl. Price 
15 cents. 
124. Revision of North American Fossil Cockroaches, by Samuel Hubbard Seudder. 1895, 8°. 
176 pp. 12pl. Price 15 cents. 
125. The Constitution of the Silicates, by Frank Wigglesworth Clarke. 1895. 8°. 109 pp. 
Price 15 cent s. 
126. A Mineralogical Lexicon, of Franklin, Hampshire, and Hampden counties, Massachusetts, 
by Benjamin Kendall Emerson, 1895. 8°, 180 pp. 1 pl. Price 15 cents. 
128. The Bear River Formation and its Characteristic Fauna, by Charles A. White. 1895, 8°. 
108 pp. 11 pl. Price 15 cents. 
129. Earthquakes in California in 1894, by Charles D. Perrine. 1895. 8°. 25 pp. Price 5 cents. 
131. Report of Progress of the Division of Hydrography for the calendar years 1893 and 1894, 
by Frederick Haynes Newell, topographer in charge. 1895, 8°. 126 pp. Price 15 cents. 
In press: 
: 127. Catalogue of Contributions to North American Geology, 1732-1891, by Nelson Horatio 
Darton. 
130. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- 
alogy for 1892 and 1893, by Fred Boughton Weeks. 
132. The Disseminated Lead Ores of Southeastern Missouri, by Arthur Winslow. 
133. Contributions to the Cretaceous Paleontology of the Pacific Coast: The Fauna of the 
Knoxville beds, by T, W. Stanton. : 
134. The Cambrian Rocks of Pennsylvania, by Charles Doolittle Walcott. 
135. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- 
alogy for the year 1894, by Fred Boughton Weeks. 
136. Volcanic Rocks of South Mountain, Pennsylvania, by Florence Bascom. 
In preparation: 
— The Moraines of the Missouri Cotean and their attendant deposits, by James Edward Todd. 
— Geology of the Fort Riley Military Reservation, Kansas, by Robert Hay. 
— Geology of the Castle Mountain Mining District, Montana, by W. H. Weed and L. V. Pirsson. 
— The Potomac Formation in Virginia, by W. M. Fontaine. 
STATISTICAL PAPERS. 
Mineral Resources of the United States [1882], by Albert Williams, jr. 1883. 8°. xvii, 813 pp. 
Price 50 cents. 
Mineral Resources of the United States, 1883 and 1884, by Albert Williams, jr. 1885. 8°. xiv, 
1016 pp. Price 60 cents. 
Mineral Resources of the United States, 1885. Division of Mining Statistics and Technology. 
1886. 8°. vii,576 pp. Price 40 cents. 
Mineral Resources of the United States, 1886, by David T. Day. 1887. 8°. viii,813 pp. Price 
60 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, 652 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. 
Mineral Resources of the United States, 1892, by David T. Day. 1893. 8°. vii,850 pp. Price 
50 cents. 
Mineral Resources of the United States, 1893, by David T. Day. 1894. 8°. viii,810 pp. Price 
50 cents. 
On March 2, 1895, the following provision was included in an act of Congress: 
“Provided, That hereafter the report of the mineral resources of the United States shall be 
issued as a part of the report of the Director of the Geological Survey.” 
The money received from the sale of these publications is deposited in the Treasury, and the 
Secretary of that Department declines to receive bank checks, drafts, or postage stamps; all remit- 
tances, therefore, must be by POSTAL NOTE or MONEY ORDER, made payable to the Director of the 
United States 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., December, 1895 WASHINGTON, D. C. 
