AMERICAN JOOHNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED By 



BENJAMIN SILLIMAN, M. D. LL. D! 



^rot'essor ot Clieiiiistry, .VlmeiaJoj^y, &c. in Yale CoUeaje^ CoiiespouiUng Member ot I 



tile Society ot Aru, Manutiictuies, and Coiniiieice, djtid Koteigu Mentbei ot 



the Geoloj^ical Society, oi London ; Member ot llie Hoyal Miuoralogical 



I Society ot Oiesdeu ; ot the liu'periai .'^ricultural Society ot Mos- ~ 



cow ; Hoaoi aiy .Member of the Lmn^au Society ol faris ; 



ot the Natural History Society ot Belfast; and^ 



Member ot various Literary and Scien- 



titic Societies in America. 



VOL. XVI.— No. I.— APRIL, 1829. 



FOR JANUARY, FEBRUARY, AND MARCH, 1829. 



NEW HAVEN; 



Published and Sold by HEZKKIAH H(AVE and A. H. MALTBY. 



PhUadeipkid, F.. UTTi'lLL.—Mw York, G. & C. CARVILL. 



Boston, HILI.IARD, GRAY, LjlTTLE & WILKINS. 



London, JOHN MtLLER, 40 Pall Mail. 



PRINTED BY HEZEfClAH HOWE. 



