' TUB 



AMERICAN .JOURNAL 



OF 



SCIENCE AJVD ARTS. 



CONDUPTED BY 



BENJAMIN SILLIIVIAN, M. D. LL, D. 



Professor of Chemistry, Mineralogy, &£. in Yale College ; Corresponding Member of 

 the Society of Arts, Manufactures, and Commerce, arid Foreign Member of 

 the Ge'ological Society, of London ; Member ot the ^oyaJ Mineralogical 

 Society ot Dresden ; of the Imperial Agiicultural iociety ot Mos- 

 cow ; Honorary Member of the Lmnsean Society ot Paris ; 

 of the Natural History Society ot Beltast; and 

 Membw of various Liter<uy and Scien- 

 tific Societies in America. 



^ VOL. XVI. No. 2.— JULY, 1829. 



FOR APRIL, MAY, AND JUNE. 



NEW HAVEN: 



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

 Philadelphia, E. L[ TTELL & BR OTIIt'^.tl.— Ve.o York, G. & C. & H. 

 CAflVlLL.— ^o5ion, MILLIARD, GRAY, LITTLE & WILKINS. 



PRINTED BY HEZEKLVH HOWE. 



