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THE » ' ... ^-j 



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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. Geo!. Soc, London ; Hon. Mem. Br. and For. Abor. Protec. Soc, Mem. Geo!. 



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



Hist. Soc, Halle ; Imp. Agric. Soc, Moscow; Nat. Hist. Soc, Belf;ist, Ire. ; riul. and 



Lit. Soc, Bristol, Eng. ; Hon. Mem. Roy. Sussex Inst., Brighton, Eng. ; Cor, 



Mem. of the Nat Hist Soc, and of the Arclisological Soc, Athens, 



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



Lit and Scion. 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 j Sec of the Yale Nat Hist. Soc, Mem. of the Conn. 



Acad, of Arts and Set ; Cor. Mem. of the Lyceum of Natural History, New York, &c 



VOL. XXXVIL— OCTOBER, 1839. 



NEW HAVEN: 



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

 HART and J. S. lATTELL.— Baltimore, Md., N. HICKMAN.— JVew York, 

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

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 No. 112 Fleet St^ and WILEY & PUTNAM, 35 Paternoster Row.— Paris, 

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PRINTED BY B. t. HAMLEN. 



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