THE v4 
AMERICAN JOURNAL 
SCIENCE AND ARTS. 
CONDUCTED BY 
BENJAMIN SILLIMAN, M.D. LL. D. 
Professor of Chemistry, Mineralogy, &c. in Yale College; Corresponding eras of 
the Society of Arts, Manufactures, and Commerce, and For eign Member of 
the Geological Society, of London; Member of the Royal Mineral sinaneet 
Society of Dresden; of the fraperial Agricultural Society of Mos- 
cow ; Honorary Member of the Linnean Society of Paris; 
of the Natural History Society of Belfast; and 
Member of various Literary ~~ "oa 
tific Societies in Ameri 
VOL. XVIL—JULY, 1829. 
NEW HAVEN: 
aise gna Sold by HEZEKIAH HOWE and A. H. MALTBY. 
pes a, BE. LITTELL & BROTHER.—.New York, G. & C. & H. 
VILL. Boston, HILLIARD, GRAY, LITTLE & WILKINS. 
PRINTED BY HEZEKIAH HOWE. 
