

M. t/ 



THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BV 



BENJAMIN SILLIMAN, M. D. LL. D. 



I'rof. Chein., Min., &,c. in Yale Coll. ; Cor. Mem. Soc. Aits, Man, ami C(jm. ; and 



For. Mem. Geol. Soc, London; Mem. Roy. Min. Soc, Dresden,' Imp. 



Agiic. Soc, Moscow; Hon. Mem. Lin. Soc, Paris; Nat. Hist. 



Soc. Belfast, Ire.; Phil, and Lit. Soc. Bristol, Eng.; 



Mem. of various Lit. and Scien. Soc. in America. 



VOL. XX.— No. 2.— .lULY, 1831. 



FOR APRIL5 MAY, AND JUNE, 1831. 



NEW HAVEN 



Published and Sold by HEZEKIAH HOWE and A. H. MALTBY. 

 Philadelphia, E. LITTELL & BROTHER.— JVew Yo3-k, G. & C. & H. 

 CARYlLhT— Boston, HILLIARD, GRAY, LITTLE & WILKINS. 



PRINTED BY HEZEKIAH WOWE. 



