THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. Chem., Min., &c. in Yale Coll. ; Cor. Mem. Soc. Arts, Man. and Com., Cor. Mem. Met. Soc, 

 and For. Mem. Geol. Soc, Hon. Mem. Br. and For. Abor. Protec. Soc, and of Scien. Soc, Lon- 

 don ; Mem. Gcol. Soc, and Hon. Mem. Lin. and Statis. Socs., Paris ; Mem. Roy. Min. Soc, 

 Dresden ; Nat. Hist. Soc, Halle ; Hon. Mem. Agric Soc, Bavaria ; Imp. Agric Soc, 

 Moscow; Nat. Hist. Soc, Belfast, Ire.; Phil, and Lit. Soc, Bristol, Eng. ; Hon. 

 Mem. Roy. Sussex Inst., Brighton, Eng. ; Cor. Mem. of the Nat Hist. Soc, 

 and of the Archeeological Soc, Athens, Greece; Lit. and Hist. Soc, 

 Quebec; Mem. of various Lit. and Scien. Soc. in the U. States. 



AIDED BY 



BENJAMIN SILLIMAN, Jr., A. B. 



Assistant in the department of Chemistry, Mineralogy and Geology in Yale College; Cor. Mem. 



of the Meteorological Soc, London ; Sec of the Yale Nat. Hist. Soc. ; Mem. of the Conn. 



Acad, of Arts and Sci. ; Cor. Mem. of the Lyceum of Natural History, 



New York ; of the Boston Society of Natural History, &c. 



VOL. XXXVIIL— l?[PKTft,^1840 





NEW HAYEN: 



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PRINTED BY B. L. HAMLEN. 





V 



