THE 



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. ; and 



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



Agric. 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. XIX.-No. 2.— JANUARY, 1831. 



FOR OCTOBER, NOVEMBER, AND DECEMBER, 1830. 



NEW HAVEN: 



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

 Philaddnhia, E. LETT ELL & BROTHER,.— /Veto York, G. &, C. &ii H. 

 CAR VILL.— Boston, HILLIARD, GRAY, LITTLE & WILKINS. 



PRINTED BY HEZEIOAH HOWE. 



