ADVERTISEMENT. 
16. On the Higher .Devonian Faunas of Ontario County, New York, by John M. Clarke. 1885. 8°. 
86 pp. 3 pi. Price 5 cents. 
17. On the Development of Crystallization in the Igneous Rocks of Washoe, Nevada, by Arnold 
Hague and Joseph P. ladings. 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, 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 H. 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, Md., 
by George H. 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. 
S°. 41 pp. 4 pi. Price 5 cents. 
30. Second Contribution to the Studies on the Cambrian Faunas of North America, by Charles D. 
Walcott. 1886. 8°. 369 pp. 33 pi. Price 25 cents. 
31. A Systematic Review of our Present Knowledge of Fossil Insects, including Myriapods and 
Arachnids, by Samuel H. 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. 
33. Notes on the Geology of Northern California, by Joseph S.Diller. 1886. 8°. 23 pp. Price 5 cents. 
34. On the relation of the Laramie Molluscan Fauna to that of the succeeding Fresh-water Eocene 
and other groups, by Charles A. White. 1886. 8°. 54 pp. 5 pi. Price 10 cents. 
35. The Physical Properties of the Iron-Carburets, by Carl Barus and Vincent Strouhal. 1886. 8°. 
2 pp. Price 10 cents. 
36. Subsidence of Fine Solid Particles in Liquids, by Carl Barus. 1887. 8°. 58 pp. Price 10 cents. 
37. Types of the Laramie Flora, by Lester F. Ward. 1887. 8°. 354 pp. 57 pi. Price 25 cents. 
38. Peridotite of Elliott County, Kentucky, by Joseph S. Diller. 1887. 8°. 31 pp. 1 pi. Price 5 
cents. 
39. The Upper Beaches and Deltas of the Glacial Lake Agassiz, by Warren Upham. 1887. 8°. 84 
pp. 1 pi. Price 10 cents. 
40. Changes in River Courses in Washington Territory due to Glaciation, by Bailey Willis. 1886. 8°. 
10 pp. 4 pi. Price 5 cents. 
41. Fossil Faunas of the Upper Devonian — the Genesee Section, New York, by Henry S. Williams. 
1886. 8°. 121 pp. 4 pi. Price 15 cents. 
42. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 
1885-86. F. W. Clarke, chief chemist. 1887. 8°. 152 pp. 1 pi. Price 15 cents. 
43. On the Tertiary and Cretaceous Strata of the Tuscaloosa, Tombigbee, and Alabama Rivers, by 
Eugene A. Smith and Lawrence C. Johnson. 1887. 8°. 189 pp. 21 pi. Price 15 cents. 
44. Bibliography of North American Geology for 1886, by Nolson H. Darton. 1887. 8°. 35 pp. 
Price 5 cents. 
45. Present Condition of Knowledge of the Geology of Texas, by Robert T. Hill. 1887. 8°. 94 pp. 
Price 10 cents. 
Numbers 1 to 6 of the Bulletins form Volume I ; Numbers 7. to 14, Volume II; Numbers 15 to 23, Vol- 
ume III; Numbers 24 to 30, Volume IV; Numbers 31 to 36, Volume V; Numbers 37 to 41, Volume VI; 
Numbers 42 to 46, Volume VII. 
The following are in press: 
46. The Nature and Origin of Deposits of Phosphate of Lime, by R. A. F. Penrose, jr. 
47. Analyses of Waters of Yellowstone National Park, by F. A. Gooch and J. E. Whitfield. 
48. On the Form and Position of the Sea Level, by R. S. Woodward. 
49. On the Latitude and Longitude of Points in Missouri, Kansas, and New Mexico, by R. S. Wood* 
ward. 
