THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. C'hem., Min., &c. in Yale Coll. ; Cor. Mem. Soc. Arts, Man. and Com. ; and For. Mem. Geo! 



Soc, London; Mem. Gcol. Soc, Paris; Mem. Roy. Min. Soc, Dresden; Nat. Hist Soc, 



Ilalle ; Imp. Agric. Soc, Moseow ; Hon. Mem. Lin. Soc, Paris ; Nat. Hist. Soc, 



Belfast, Ire. ; Phil, and Lit. Soc, Bristol, Eng. ; Hon. Mem. Roy. Sussex 



Inst., Brighton. Eng. ; Lit. and Hist. Soc, Quebec; Mem. of 



various Lit. and Scien. Soc. in America. 



AIDED BY 



BENJAMIN SILLIMAN, Jb., A. B. 



Assistant in the department of Chemistry, ftlineralogy and Geology in Yale College ; Sec. of the 



Y'ale Nat. Hist. Soc, Mem. of the Conn. Acad, of Arts and Sci, ; Cor. Mem. of the 



Lyceum of Natural History, New York, &c, 



VOL. XXXV.— No. 2.— JANUARY, 1839. 



FOR OCTOBER, NOVEMBER, AND DECEMBER, 1838. 

 PUBLISHED AT NEW HAVEN ON 32th JANUARY, 1839. 



NEW HAVEN: 



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