f- ^^ ^,,^-^f*''%,^- 



THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTBB BV 



BENJAMIN SILLIMAN, M. D. LL. D. 



l^f. Choni*', Min., &c. in Yale Coll. j Cor. Mem. Soc. Arts, Man. and Com. ; and 



Foi , Mem. GqoI. Soc, London; Mem. Roy. Min. Soc, Dresden; Imp. 



Agric. Soc, Moscpyir; Hon. Mem. Lfo. Soc, Paris; Nat, Htet. * 



Soc Belfast, Ire.; Phil, and Lifp^Soc.' Bristol, Eug. ; 



Mem. of various Lit. and Scien. Soc in Awerica, 



VOL. XVIII.— No. 1. -APRIL, 1830. 



FOR JANUARY, FEBRUARY, AND MARCH, 1830. 



NEW HAVEN: 



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

 Philadelphia, E. LITTELL & BROTHER.— Mw York, G. & C. & H. 

 CAKVlLh.— Boston, HILLIARD, (}RA!^, LITTLE & WILKINS. 



PRINTED BY HEZEKIAH HOWE. 



J^. 



^ 



