v/,^4 f^e V. ^ ^ 



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. ; and For. Mem. Geo!. 



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



Halle ; Imp. Agric. Soc, Moscow ; Hon. Mem. Lin. Soc, Paris ; Nat. Hist. Soc, 



Belfast, L:e. ; 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, Jr., A. B. 



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



Yale Nat. Hist. Soc, Mem. oi the Conn. Acad, of Arts and Sci, ; Cor. Mem. of the 



Lyceum of Natural History, New York, &c. 



VOL. XXXV.— No. 1.— OCTOBER, 1838. 



FOR JULY, AUGUST, AND SEPTEMBER, 1838. 



NEW HAVEN: 



Sold by A. H. MALTBY and B. & W. NOYES.— Philadelphia, CAREY & 

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