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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 

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1884. 8°. 184 pp. Price 10 cents. 



8. On Secondary Enlargements of Mineral Fragments in Certain Rocks, by R. D. Irving and C. 

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9. A Report of work done in the Washington Laboratory during the fiscal year 1883-'84. F. W. 

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10. On the Cambrian Faunas of North America. Preliminary studies, by Charles Doolittle Wal- 

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11. On the Quaternary and Recent Mollusca of the Great Basin; with Descriptions of New 

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12. A Crystallographie Study of the Thinolite of Lake Lahontan, by Edward S. Dana. 1884. 8°. 

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13. Boundaries of the United States and of the several States and Territories, with a Historical 

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14. The Electrical and Magnetic Properties of the Iron-Carburets, by Carl Barus and Vincent 

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15. On the Mesozoic and Cenozoic Paleontology of California, by Charles A. White. 1885. 8°. 

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16. On the Higher Devonian Faunas of Ontario County, New York, by John M. Clarke. 1885. 8°. 

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17. On the Development of Crystallization in the Igneous Rocks of Washoe, Nevada, with Notes 

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18. On Marine Eocene, Fresh- water Miocene, and other Fossil Mollusca of Western North America, 

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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- 

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21. The Lignites of the Great Sioux Reservation. A Report on the Region between the Grand 

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22. On New Cretaceous Fossils from California, by Charles A. -White. 1885. 8°. 25 pp. 5 pi. 

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23. Observations on the Junction between the Eastern Sandstone and the Keweenaw Series on 

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24. List of Marine Mollusca, comprising the Quaternary fossils and recent forms from American 

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1885. 8°. 336 pp. Price 25 cents. 



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

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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 

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28. The Gabbros and Associated Hornblende Rocks occurring in the Neighborhood of Baltimore, 

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29. On the Fresh-water Invertebrates of the North American Jurassic, by Charles A. W T hite. 1886. 

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

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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 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 

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

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36. Subsidence of Fine SolidParticles in Liquidsj by Carl Barus. 1886. 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. PeridotiteofElliottCounty, Kentucky, by J. S. Diller. 1887. 8°. 31pp. lpl. Price5cents. 



39. The Upper Beaches and Deltas of the Glacial Lake Agassiz, by Warren Upham. 1887. 8°. 

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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. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 

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