IV ADVERTISEMENT^ 



17. On tlie Development of Cryst.illiziition in tlie Igneous Itocks 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. 

 (Exhau.«ted.) 



20. Contributions to the Mineralogy of the Rocky Moitntains, 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 aiul 

 Moreau Rivers, Dakota, by Bailej- AVillis. 1885. S''\ 16 pp. 5 pi. Price 5 cents. 



22. On New Cretaceous Fossils from California, by Charles A. AVhite. 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 ^loUusca, comprising the Quaternary Fossils and Recent Forms from American 

 Localities between Cape Hatteras and Cape Roque, including the Bermudas, by "William Healy DaU. 

 1885. S-^. 336 pp. Price 25 cents. 



25. The Present Technical Condition of the Steel Indtxstry of the United States, by Phineas Barnes. 

 1885. 8°. 85 pp. Price 10 cents. 



26. Copper Smelting, l)y Henry M. Howe. 1885. 8°. 1U7 pp. Price 10 cents. 



27. Report of "Work done in the Division of Chemistry and Physics, mainly during the Fiscal Year 

 l884-'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". 41 pp. 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. 



33. Notes on the Geology of Northern California, by J. 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. Physical Properties of the Iron-Carburets, by Carl Barus and Vincent Strouhal. 1886. 8°. 62 

 pp. Price 10 cents. 



36. Subsidence of Fine Solid Particles in Liquids, by Carl Bariis. 1886. 8°. 58 pp. Price 10 cents. 



37. Types of the Laramie Flora, by Lester F. "Ward. 1887. 8°. 3.54 pp. 57 pi. Price 25 cents. 



38. Peridotite of Elliott County, Kentucky, by J. 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. 1887. 

 8°. 10 pp. 4 pi. Price 5 cents. 



41. On the Fossil Faunas of the Upper Devonian — the Genesee Section, New York, by Henry S. 

 Williams. 1887. 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 ph Price 15 cents. 



43. 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 Nelson H. Darton. 1887. 8°. 35 pp. 

 Price 5 cents. 



45. The Present Condition of Knowledge of the Geology of Texas, by Robert T. HUl. 1887. 8°. 94 

 pp. Price 10 cents. 



46. Nature and Origin of Deposits of Phosphate of Lime, by R. A. F. Penrose, jr., with an Intro- 

 duction by N. S. Shaler. 1888. 8°. 143 pp. Price 15 cents. 



47. Analyses of Waters of the Yellowstone National Park, with an Account of the Metliods of 

 Analysis employed, by Frank Austin Gooch and James Edward Whitfield. 1888. 8°. 84 pp. Price 

 10 cents. 



48. On the Form and Position of the Sea Level, by Robert Simpson Woodward. 1888. S°. 88 pp. 

 Price 10 cents. 



49. Latitudes and Longitudes of Certain Points in Missouri, Kan.sas, and New Mexico, by Robert 

 Simpson Woodward. 1889. 8°. 133 pp. Price 15 cents. 



50. Formulas and Tables to facilitate the Construction .and Use of Maps, by Robert Simpson Wood- 

 ward. 1889. 8'^. 124 pp. Price 15 cents. 



