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6. Elevations in the Dominion of Canada, by J. W. Spencer. 1884. 8°. 43 pp. Price 5 cents. 



7. Mapoteea Geolouiioa AnuTicana. A Catalogue of Geological Maps of America (Noitli anil 

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1884. 8^. 184 pp. I'lifr KU-ciits. 



8. On Secondary EiilargLiucnts of Mineral Fragments in Certain Rocks, by R. D. Ir\iiig 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 Doolittlo Wal- 

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11. Ou the Quaternary and Recent Jlollusca of the Great Basin; with Descriptions of New 

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12. ACrystallograiihicStudy of the Thiuolite of Lake Lahontan, by Edward S.Dana. 1884. 8°. 

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13. Boundaries of the United State.s .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. Ou the Mesozoic aud Cenozoic Paleontology of California, by Charles A. White. 1885. 8°. 

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

 86 pp. 3 ])1. Price 5 cents. 



17. On the Development of Crystallization in the Igneous Rocks of Waslioe, 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 (in tlir Str:iti;;r;iiiliy of California, by George F.Becker. 1885. 8". 28pp. PriceS cents. 



20. Coutributions to the JMiueralogv 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 CaUforuia, 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 cuts. 



25. The Present Tcchuical 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 :in(l .Vssociated Hornldcude Rocks occurring in the Neighborhood of Baltimore, 

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29. OntheFresb-waterlnvertebrates of the North American Jurassic, byCharles A. White. 1886. 

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

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

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32. Lists aud Analyses of the Jlineral Springs of the United States; a Preliminary Study, by 

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33. Notes on the Geology of Northeru California, by J. S. Diller. 1886. 8'. 23 pp. Price 5 cents. 



34. On the relation of the Laramie Molluscan Fauiia 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. SubsideuceofFincS<ilidParticlesinLic|uid»,bvCarlBarus. 1886. 8°. .58pp. Price lOcents. 



37. Types of the l.^iraniic Flora, by Lester F.Ward. 1887. 8°. 354 pp. .57 pL Price 25 cents. 



38. Peridotiteofi:iliott(onnty,Keutncky,byJ.S.Diller. 1887. 8^. 31pp. Ipl. Price5cents. 



39. The Upper Beaches aud 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, I>v Henry S. 

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42. Report of work done in the Division of Chemistry and Physics, mainly during the tiscal veaj- 

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