// 



THE 



A3IERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. Chem., Min., &c. in Yale Coll.; Cot. Mem. Soc. Arts, Man. and Com.; and 



For. Mem. Geol. Soc, London; Mem. Roy. Min. Soc, Dresden; Imjp. 



Agnc. 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. XVIL— No. 2.-JANUARY, 18.30. 



FOR OCTOBER, NOVEMBER, AND DECEMBER, 1839. 



NEW HAVEN: 



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

 Philadelphia, E. LITTELL & 8R0 THaa. — Vew Vork, G. & C. S& H, 

 CAiiV ILL.— Boston, BILLIARD, GRAY, LITTLE & WILKINS. 



PRINTED BY HEZEKIAH HOWE. 



