TV; ADVERTISEMENT. 
In preparation: 
—Notes on the Geology of Southwestern Kansas, by Robert Hay. 
— On the Glacial Boundary, by G. F. Wright. 
— The Gabbros and Associated Rocks in Delaware, by F. D. Chester. 
— Fossil Woods and Lignites of the Potomac Formation, by F. H. Knowlton. 
— Mineralogy of the Pacifie Coast, by W. H. Melville and Waldemar Lindgren. 
—Report of work done in the Division of Chemistry and Physies, mainly during the fiscal year 
1586-87. : 
—A Report on the Thermo-Electrical Measurement and High Temperatures, by Carl Barus. 
— The Greenstone Schist Areas of the Menominee and Marquette Regions of Michigan, by George 
H. Williams; with an introduction by R. D. Irving. : 
—Bibliography of the Paleozoic Crustacea, by A. W. Vogdes. 
—The Viscosity of Solids, by Carl Barus. 
—Author-Catalogue of Contributions to North American Geology, by N. H. Darton. 
— Ona Group of Volcanic Rocks from the Tewan Mountains, New Mexico, and on the occurrence 
of Primary Quartz.in certain Basalts, by J. P. Iddings. 
—On the relations of the Traps of the Jura-Trias of New Jersey, by N. H. Darton. 
— Altitudes between Lake Superior and the Rocky Mountains, by Warren Upham. 
— Mesozoic Fossils in the Permian of Texas, by C. A. White. 
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, 1333 aud 1834, by Albert Williams, jr. 1835. 8°. xiv, 
1016 pp. Price 60 cents. 
Mineral Resources of the United States, 1835. Division of Mining Statistics and Technology. 
1886. 8°. vii, 576 pp. Price 40 cents. 
Mineral Resources-of the United States, 1835, by David T. Day. 1837. 8°. viii, 813 pp. Price 
50 cents. 
Mineral Resources of the United States, 1837, by David T. Day. 1883. 8°. vii, 832 pp. Price 
50 cents. 
In preparation : 
Mineral Resources of the United States, 1888, by David T. Day. 
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 Librarian of the 
U.S. Geological Survey, or in CURRENCY for the exact amount. Correspondence relating to the pub- 
lications of the Survey should be addressed 
To THE DIRECTOR OF THE 
UNITED STATES GEOLOGICAL SURVEY, 
WASHINGTON, D. C. 
WASHINGTON, D. C., March 1, 1889. 
