ADVERTISEMENT. Ill 
BULLETINS. 
1. On Hypersthene-Andesite and on Triclinic Pyroxene in Augitic Rocks, by Whitman Cross, with a 
Geological Sketch of Buffalo Peaks, Colorado, by S. F. Emmons. 1883. 8°. 42 pp. 2 pi. Price 10 cents. 
2. Gold and Silver Conversion Tables, giving the Coining Value of Troy Ounces of Fine Metal, etc., 
computed by Albert Williams, jr. 1883. 8°. 8 pp. Price 5 cents. 
3. On the Fossil Faunas of the Upper Devonian, along the Meridian of 76° 30', from Tompkins County, 
New York, to Bradford County, Pennsylvania, by Henry S. Williams. 1881. 8°. 36 pp. Price 5 cents. 
4. On Mesozoic Fossils, by Charles A. White. 1884. 8°. 36 pp. 9 pi. Price 5 cents. 
5. A Dictionary of Altitudes in the United States, compiled by Henry Gannett. 1884. 8°. 325 pp. 
Price 20 cents. 
6. Elevations in the Dominion of Canada, by J. W. Spencer. 1884. 8°. 43 pp. Price 5 cents. 
7.Mapoteca Geologica Americana. A Catalogue of Geological Maps of America (North and South), 
1752-1881, in Geographic and Chronologic Order, by Jules Marcou and John Belknap Marcou. 1884. 
8°. 184 pp. Price 10 cents. 
8. On Secondary Enlargements of Mineral Fragments in Certain Pocks, by P. D. Irving and C. R. 
VanHise. 1884. 8°. 56 pp. 6 pi. Price 10 cents. 
9. A Beport of Work done in the Washington Laboratory during the Fiscal Year 1883-'84. F. W. 
Clarke, Chief Chemist. T. M. Chatard, Assistant Chemist. 1884. 8°. 40 pp. Price 5 cents. 
10. On the Cambrian Faunas of North America. Preliminary Studies, by Charles Doolittle Walcott. 
1884. 8°. 74 pp. 10 pi. Price 5 cents. 
11. On the Quaternary and Recent Mollusca of the Great Basin ; with Descriptions of New Forms, 
by R. Ellsworth Call. Introduced by a Sketch of the Quaternary Lakes of the Great Basin, by G. K. 
Gilbert. 1884. 8°. 66 pp. 6 pi. Price 5 cents. 
12. A Crystallographic Study of the Thinolite of Lake Lahontan, by Edward S. Dana. 1884. 8°. 
34 pp. 3 pi. Price 5 cents. 
13. Boundaries of the United States and of the Several States and Territories, with a Historical 
Sketch of the Territorial Changes, by Henry Gannett. 1885. 8°. 135 pp. Price 10 cents. 
14. The* Electrical and Magnetic Properties of the Iron-Carburets, by Carl Barus and Yincent 
Strouhal. 1885. 8°. 238 pp. Price 15 cents. 
15. On the Mesozoic and Cenozoic Paleontology of California, by Charles A. White. 1885. 8°. 33 pp. 
Price 5 cents. 
16. On the Higher Devonian Faunas of Ontario County, New York, by John M. Clarke. 1885. 8°. 
86pp. 3 pi. Price 5 cents. 
17. On the Development of Crystallization in the Igneous Rocks of Washoe, Nevada, with Notes on 
the Geology of the District, by Arnold Hague and Joseph P. Iddings. 1885. 8°. 44 pp. Price 5 
cents. 
18. On Marine Eocene, Fresh-water Miocene, and Other Fossil Mollusca of Western North America 
by Charles A. White. 1885. 8°. 26 pp. 3 pi. Price 5 cents. 
19. Notes on the Stratigraphy of California, by George F. Becker. 1885. 8°. 28 pp. Price 5 cents. 
20. Contributions to the Mineralogy of the Rocky Mountains, by Whitman Cross and W. F. Hille- 
brand. 1885. 8°. 114 pp. 1 pi. Price 10 cents. 
21. The Lignites of the Great Sioux Reservation; a Report on the Region between the Grand and 
Moreau Rivers, Dakota, by Bailey Willis. 1885. 8°. 16 pp. 5 pi. Price 5 cents. 
22. On New Cretaceous Fossils from California, by Charles A. White. 1885. 8°. 25 pp. 5 pi. 
Price 5 cents. 
23. Observations on the Junction between the Eastern Sandstone and the Keweenaw Series on 
Keweenaw Point, Lake Superior, by R. D. Irving and T. C. Chamberlin. 1885. 8°. 124 pp. 17 pi. 
Price 15 cents. 
24. List of Marine Mollusca, comprising the Quaternary Fossils and Recent Forms from American 
Localities between Cape Hatteras and Cape Roque, including the Bermudas, by William Healy Dall. 
1885. 8°. 336 pp. Price 25 cents. 
25. The Present Technical Condition of the Steel Industry of the United States, by Phineas Barnes. 
1885. 8°. 85 pp. Price 10 cents. 
26. Copper Smelting, by Henry M. Howe. 1885. 8°. 107 pp. Price 10 cents. 
27. Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal Year 
1884-'85. 1886. 8°. 80 pp. Price 10 cents. 
28. The Gabbros and Associated Hornblende Rocks occurring in the Neighborhood of Baltimore, 
Maryland, by George Huntington Williams. 1886. 8°. 78 pp. 4 pi. Price 10 cents. 
29. On the Fresh-water Invertebrates of the North American Jurassic, by Charles A. White. 1886. 
8°. 41pp. 4 pi. Price 5 cents. 
30. Second Contribution to the Studies on the Cambrian Faunas of North America, by Charles Doo- 
little Walcott. 1886. 8°. 369 pp. 33 pi. Price 25 cents. 
31. Systematic Review of our Present Knowledge of Fossil Insects, including Myriapods and Arach- 
nids, by Samuel Hubbard Scudder. 1886. 8°. 128 pp. Price 15 cents. 
32. Lists and Analyses of the Mineral Springs of the United States (a Preliminary Study), by Albert 
C. Peale. 1886. 8°. 235 pp. Price 20 cents. 
