

THE 



AMERICAN JOURNAL 



or 



SCIENCE AND ARTiS. 



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. Geol, 



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



Inst., Brighton, Eng. ; Lit. and Hist. Sec, dnebec; Mem. of 



vailous 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. of the Conn. Acad, of Arts and Sci. j Cor. Mem. of the 



Lyceum of Natural History, New York, &c. 



VOL. XXXIV.— No. 1.— APRIL, 1838. 



FOB JANUARY, FEBRUARY, AND MARCH, 1838. 



NEW HAVEN: 



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