ADVERTISEMENT. Ill 
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. 
R. Van Hise. 1884. 8°. 56 pp. 6pl. Price 10 cents. 
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 Description of New 
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12. A Crystallographic Study of the Thinolite of Lake Lahontan, by Edward 8. Dana. 1884. 8°, 
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14. The Electrical and Magnetie 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°. 
86 pp. 3pl. Price 5 cents. 
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 Mollusea of Western North America, 
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19. Notes on the Stratigraphy of California, by George F. Becker. 1885. 8°. 28pp. Price5 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 Vossils from California, by Charles A. White. 1885. 8°. 25 pp. pl. 
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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 Mollusea, 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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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. White. 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 
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 
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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 Solid Particlesin Liquids, by Carl Barus. 1886, 8°. 58 pp. Price 10cents. 
37. Types of the Laramie Flora, by Lester F. Ward. 1887. 8°. 354pp. 57 pl. Price 25 cents. 
38. Peridotite of Elliott County, Kentucky, by J.S. Diller. 1887. 8°. 31 pp. 1pl. 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 8. 
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