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7. Lettre from the secretary of the treasury transmitting the report 



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8. Tremont. Ch. Map of the Oregon and Upper California. Was- 



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9. Abert, J. J. Military reconnaissance of the Arcansas, Rio de 



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10. Map of the mineral Land of Lake superior. Washington 1843. 



11. Map of the Upper l>lissisippi by Nicollet. Washington 1843. 



12. Ephemeris of Neptun for 1852. 40. 



13. Smith and Hardcaste. A map of the Valley of Mexico. 



14. Ph. St. George Cooke. Official Journal from Santa Fe to San 



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15. Report of the secretary of State. 



16. Smitsonian Institution, fourth annual report for the year 1849. 



Washington 1850. 



17. Geological report on the copper lands of lake superior fand district 



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18. B. A. Gould. Report on the history of the discovery of Neptune. 



Washington 1850. 8«. 



19. T. Butler Ring. Report on California. Washington 1850. 80. 



20. Proceedings of the american association for the advancement of 



science, fourth meeting. Washington 1851. 80. 



21. D. D. Owen. Report of a geological reconnaissance of Chippewa 



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 Von den Herren Verfassern : 



Schweizerische Zeitschrift für Medicin. Jahrgang 1851. Heft 

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 Von der physik.-medicin. Gesellschaft in Würzburg. 



Verhandlungen. Zweiter Bd. Nr. 6—13. Erlangen 1851. 80. 



