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made at the Royal Observatory, Greenwich, in the Year 1855, 

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 Isaac Lea, LL. D. 



Descriptions of Four New Species of Exotic Uniones, and Thir- 

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Observations on the Genus Unio, together with Descriptions of 

 New Species in the Family Unionidaj. Vol. VI. Pt. I. 1857. 4to. 

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 Major Benjamin Alvord^ U. S. A. 



The Tangencies of Circles and of Spheres. 4to pamph. Phila- 

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 Alexis Jordan. 



Nouveau Memoire sur la Question relatif aux JEgilops triticoides 

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Fourteenth Report to the Legislature of Massachusetts, relating 

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Abstract of the Census of the Commonwealth of Massachusetts, 

 taken with Reference to Facts existing on the First Day of June, 

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 American Philosophical Society. 



Transactions. New Series. Vol. XL Part L 4to. Philadel- 

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Proceedings. Vol. VL Nos. 57 and 58, Jan. to June, and July to 

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Astronomical Journal. Vol. V. Nos. 7-16. 4to. Albany, 

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 Edouard Besor. 



Une Derniere Ascension. 8vo pamph. Neuchatel. 1854. 



Du Climat des Etats-Unis et de ses Effets sur les Habitudes et les 

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