THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



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

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

 the Geological Society, of London ; Member of the Royal Mineralogical 

 Society of Dresden; of the Imperial Agricultural Society of Mos- 

 cow ; Honorary Member of the Linnsean Society of Paris ; 

 of the Natural History Society of Belfast ; and 

 Member of various Literary and Scien- 

 tific Societies in America. 



VOL. XIV.— JULY, 1828. 



NEW HAVEN: 



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



Philadelphia, E. LITTELL.— Mw York, G. & C. CARVILL. 



Boston, HILLIARD, GRAY, LITTLE & WILKINS. 



London, JOHN MILLER, 40 Pall Mall. 



PRINTED BY HEZEKIAH HOWE. 



