

THE 



AMERICAN JOURNAL 



OF 



SCIENCE ANB 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. Sqc, 



and For. Mem. Geol. Soc, London ; Hon, Mem. Br. and For. Abor. Proiec. Soc, Mem. Geol. 



Soc, and Hon. Mem. Lin. and Statis. Socs., Paris ; Mem. Roy. Min. Soc, Dresden ; Nat. 



Hist Sor., "lulle ; Imp. Agric. Soc, Moscow ; Nat. Hist. Soc, Belfast, L-e. ; Phil, and 



Lit. '"'o , Bristol, Eng. ; Hon. Mem. Roy. Sussex Inst., Brighton, Eng. ; Cor. 



M :i. . of the Nat. Hist. Soc, and of the Arclieeological Soc, Athens, 



Greece; Lit. and Hist. Soc, Quebec; Mem, of various 



Lit. and Scien. Soc. in the U. States. 



AIDED BY 



BENJAMIN SILLIMAN, Jb., A. B. 



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



of tlie 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, &c. 



VOL. XXXVII.— No. 2.— OCTOBER, 1839. 



FOR JULY, AUGUST, AND SEPTEMBER, 1839. 



NEW HAVEN; 



S-)ld by A. H. MALTBY and B. & W. ^OYYJ^.—PhiUMfUa, CAREY & 

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 " VRVILL & Co., No. 108 Broadway, and G. S. SILLIMAN, No. 44 Wil- 

 liam '^X.— Boston, C. C. LITTLE & Go.— London, JAMES S. HODSON, 

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 J. B. BAILLIERE, Libraire, Rue de L'Ecole-de-medecine, No. 13 bis. — Ham- 



hurgh, Messrs. NESTLER & MELLE. 



£ 



PRINTED BY B. L. HAMLEN. 



Pa^iisiied at Noiv Havcu, Oct. 12, 1§39. 



