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17. On the Development of Crjstallizatiou iu the I^jneous Rocks of Washoe, Nevada, with Notes 

 on the Geology of the District, by Arnold Hague and Joseph P. Iddings. 18A5. S°. 44 pp. Price 5 

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18. On Marino Eocene, Fresh-water Miocene, and other Fossil Molhisca 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. Contribntions 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 Sionx Reservation. A Report on the Region between the Grand and 

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22. On New Cretaeeons 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. 18^5. 8°. 124 pp. 17 pi. 

 Price 15 cents. 



24. List of Marine Molhisca, ccmiprising the Quaternary fossils and recent forms from American 

 Localities between Cape Hatteras and Cape Roque, including the Bermudas, by William Healey Dall. 

 1885. 8<^. 330 pp. Price 2."> cents. 



25. The Present Technical Condition of the Steel Industry of the United States, by Pliineas Barnes. 

 1885. 8<^. H5 pp. Price 10 cents. 



26. Copper Snudting, by Henry M. Howe. 1885. 8'^. 107 pp. Price 10 cents. 



27. Re|>ort of work done in the Division of Chemistry and Physics, mainly during the liscal year 

 1884-'85. 18-*6. 8^. 80 pp. Price 10 cents. 



28. The (Jabbros ami .Vssociated Hornblende Rocks occurring in the Neighborhood of Baltimore, 

 Md., 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. 188G. 

 8°. 41 pp. 4 1>1. Price 5 cents. 



30. Second Contribnticm to the Studies on the Cambrian Fannas of North America, by Charles 

 Doolittle Walcott. 1H8*;. 8^. 369 pp. 33 pi. Price 25 cents. 



31. .Systematic Review of our Present Knowledge of Fossil Insects, including Myriapods and 

 Arachnids, by Samuel Hubbard Scndder. 1886. S-^. 128 pp. Price 15 cents. 



32. Lists and Analyses of the Mineral Springs of the United States; a Preliminary Study, by 

 Albert C. Peale. Ihs;. "tjo. 2:15 pp. Price 20 cents. 



33. Noteson the Geology of Northern California, by J. S.Diller. 1886. 8^. 23 pp. Price5cents. 



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 |)p. 5 pi. Price 10 cents. 



35. Physical Properties of the Iron-Carburets, by Carl Barns and Vincent Stronhal. 1886 8°. 

 02 pp. Price 10 cents. 



36. SubsideiiceofFineSolidParticlesin Liquids, bvCarl Barns. 1886. 8°. 58pp. Price 10 cents. 



37. Types i.f the Laramie Flora, by Lester F. Ward. 1887. 8=. 3.54 pp. .57 pi. Price 25 cents, 

 a-j. Peridotite of Elliott County, Kentucky, by J S. Diller. 1887. 8°. 31pp. 1 pi. Price 5 cents. 



39. The Upper Be.icbes and Deltas of tlie Glacial Lake Agassiz, by Warren Upham. 1887. 8'^. 

 84 pp. 1 pi. Price 10 cents. 



40. Changes in River Courses iu Washington Territory duo to Glaciation, by Bailey Willis. 1887. 

 8°. 10 pp. 4 pi. Price 5 cents. 



41. On the Fo.ssil Fannas of the Upper Devonian — the Genesee Section, New York, by Henry S. 

 Williams. ls~7. 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'^. 1.52 pp. 1 pi. "Price 15 ceiits. 



43. Tertiary and Cretace(ms.Strataof the Tuscaloosa, Tonibigbee, 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. 

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45. The Present Condition of Knowledge of the Geology of Te.xas, by Robert T. Hill. 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- 

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

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

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4-!. On the Form and Position of the Sea Level, by Robert Simpson Woodward. 1888. b°. 88 

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49. Latitudes and Longitudes of Certain Points in Mis.souri, Kansas, and New Me.\ico, 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 

 Woodward. 1889. 8-. 124 pp. Price 15 cents. 



51. On Invertebrate Fossils from the Pacific Coast, by Charles Abiathar White. 1889. 8'=. 102 

 X:p. 14 pi. Price 15 cents. 



.52. Subai'rial Decay of Rocks and Origin of the Rod Color of Certain Formations, by Israel Cook 

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53. The Geology of Nantucket, by Nathaniel Southgate Shaler. 1889. 8°. 55 pp. 10 pi. Price 

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