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24. Listof Miiriiio MoUnsca. i-nniprisingthpQuateruiiry Fossils and Recent Forms from American 

 Localities between Cape Hatteras anil Cape Eoque, including the Bermudas, by William Healey Dall. 

 1885. 8°. 33(5 pp. Price 25 cents. 



25. The Present Technical Conditinu of the Steel Industry of the United States, by Phineas 

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2(i. Copper Smelting, by Henry M. Howe. 1885. 8^. 107 pp. Price 10 cents. 



27. Ivei>ort of Work doiie in the Division of Chemistry and Physics, mainly during the Fiscal Year 

 1884_'85. 188ti. 8-. 80 jip. Price 10 cents. 



28. The Galil>ro8 and Associated Hornblende Rocks occurring in the Neighborhood of Baltimore, 

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29. Oii the Fresh-Water In vertebratesof the North American Jurassic, by Charles A. White. 1886. 

 8^. 41 pp. 4 pi. Price f) cents. 



30. Second Contribution to the Studies on the Cambrian Faunas of North America, by Charles 

 Doolittle Walcott. 1886. 8". 369 pj). 33 pi. Price 25 cents. 



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

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

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33. Notes on the (icology of N(utlii'ru California, by. J. S.Dillcr. 1886. 8°. 23 pp. Price5ceuts. 



34. On the Relationofthe Laramie Molluscan Fauna to that of the Succeeding Fresh- Water Eocene 

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

 62 pp. Price 10 cents. 



36. SubsidenceofFineSolidParticlesinLiquid8,hyCarlBaru8. 1886. 8°. 58pp. Price 10 cents. 



37. Types of the Laramie Flora, by Lester F. Ward. 1887. 8°. 354 pp. 57 pi. Price 25 cents. 



38. PeridotiteofElliottCounty. Kentucky, by. J. S. Diller. 1887. 8'-'. 31pp. Ipl. Price5cents. 



39. Tlfe 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. 

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

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42. Reportof Work done in the Division of Chemistry and Physics, mainly during the Fiscal Ye.ar 

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43. Tertiary and Cretaceons Strata of the Tuscaloosa, Tombigbee, and Alabama Rivers, by Eugene 

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44. Bililiography of North American Geology for 1886, by Nelson H. Darton. 1887. S°. 35 pp. 



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45. The Present Condition of Knowledge of the Geology of Texas, 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 

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48. On the Form and Position of the Sea Level, by Robert Simpson Woodward. 1888. 8'=. 88 

 pp. Price 10 cents. 



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

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50. Formulas and Tables to Facilitate the Construction and Use of Maps, b>- Robert Simpson 

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

 pp. 14 pi. Price 15 cents. 



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

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

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,54. On the Theruio-Elcctric Measurement of High Temperatures, by Carl Barns. 1889. 8°. 

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55. Report of Work done in the Division of Chemistry and Physics, mainly during the Fiscal 

 Year 1886-'87. Frank Wigglcsworth Clarke, Chief Cheini.st. 1889. »^. 96 pp. Price 10 cents. 



56. Fossil Wood and I^ignite of the Potomac Formation, by Frank Hall Knowltou, 1889. 8^. 

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57. A Geological Reconnoissance in Southwestern Kansas, by Robert Hay. 1890. 8^. 49 pp. 

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58. The (ilacial Uoundarv in Western Pennsylvania. Ohio, Kentucky, Indiana, .and Illinois, by 

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59. The Gabl)ros and Associated Rocks in Delaware, by Frederick D. Chester. 1890. 8*^. 45 

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60. Report of Work done iu the Division of Chemistry and Physics, mainly during the Fiscal 

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