DABirON.] 



NORTH AMERICAN GEOLOGY. 



495 



Humphreys, A. A. Report upon the 

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 Conclusioii of the final review of the 

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Eeporta of explorations from Mississippi 



Eivcr to tlie Pacific, vol. 7, part 3, pp. 11-18. 



WasliiiigtoD, 1857. 



— — Letter [on formation of horseshoe 

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Letter to Sir Charles Lyell [on 



thickness of alluvium of the Missis- 

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TJ. S. Army, Chief of Engineers, Eeport 

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and Abbott, H. L. Report upon 



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 Based upon surveys and Investigations 

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Eevieweil by Eads, Tan Nostrand's Eng. 

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Long, S. H., and. Report of the 



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Eeport Sec. War, 31st Cong., 23 sess. [Sen- 

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Humphreys, A. N. Mining methods 

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Geol. Surv. Pennsylvania, Annual Eeport 

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Am. Assoc, Proc, vol. 16, pp. 112-114, 

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Abstracts, Canadian Nat., vol. 3, new se- 

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Hungerford, Edward — Continued. 

 Considerations relating to the cli- 

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Am. Assoc, Proc, vol. 16, pp. 108-111, 1868. 

 Abstract, Am. Nat., vol. 1, pp. 498-499, 1868. 



Evidences of glacial action on the 



Green, Mountain summits. 



Am. Jour, Sci., 2d series, vol. 45, pp. 1-5, 

 1868. 



Hunt, E. B. Florida reef, its origin, 

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On the origin, growth, substructure, 



and chronology of the Florida reef. 

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Hunt, Joseph H. A group of copper 

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New York Acad. Sci., Trans., vol. 9, pp. 140- 

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 Hunt, T. Starry. Analyses of minerals 

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Am. Assoc. Adv. Sci., Proc, vol. 2, pp. 325- 

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Am. Jour. Sci., 2d series, vol. 9, pp. 12-19, 

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Report of chemist and mineralogist. 



Canada, Geol. Surv., Eeport for 1847-48 

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On the acid springs and gypSum de- 

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Report of chemist and mineralogist 



of the Provincial geological survey. 

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Am. Assoc, Proc, vol. 4, pp. 202-204, 1851. 



Examination of phosphatic matter 



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Geol. Soc , Quart. Jour., vol. 8, pp. 209-210, 

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Geol. Surv. Canada, Eeport of progress, 

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Abstract, Am. Jour. Sci., 2d series, vol. 17, 

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