/ vr^^ie -^ ^^~€^ '^"^ -f^ c^c^ 



^t. %. 



^•s^ Q ^^. THE 



AaiERICAN JOURIVAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. Chera., Min., &c. ir» Yale Coll. ; Cor. Mem. Soo. Arts, Man. and Com., Cor. Mem. Met,. See, 



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



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



Hist. Soc, Hulle; 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 Archseole'gical Soc, Athens, 



Greece ; Lit. ar.d Hist. Soc, Q.uebec ; 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 Scj. ; Cor. Mem. of the Lyceum of Natural History, New York, &c. 



VOL. XXXVIL— No. 1.— JULY, 1839. Bis. 



NEW HAVEN; 



Sold by A. H. MALTBY and B. & W. T!iOYES.— Philadelphia, CAREY & 

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PRINTED BY B. L. HAMLEN. 



Fublislied at New IIaveii> Aug. 15, IS39. 



