. 
ee eee ee ee ee Pee ee 
AMERICAN JOURNAL 
SCIENCE AND ARTS. 
CONDUCTED BY 
BENJAMIN SILLIMAN, M.D. LL.D. 
Prof. Chem., Min., &c. in Yale Coll.; Cor. Mem. Soc. Arts, Man. and Com. ; and For. Mem. Geol. 
Soc., Tandon ; Mem. ores Soc., "Pucie; Mem. Roy. Min. Soc., Dresden; Nat. Hist. Soc., 
Ire. ; Phil and Lit. Soc., Bristol, Eng.; Hon. Mem. Roy. Sussex 
pa Brighton, Eng. ; Lit. i . of 
various Lit. and Scien. Soc. in America. 
AIDED BY 
BENJAMIN SILLIMAN, Jr., A.B. 
in the department of Chemistry, Mineralogy and Geology in Yale College; Sec. of the 
gpa cae Mem. of the Conn. Acad. ee dison wk: Cor. Mem. of the 
Lyceum of Natural History, New York, &c. 
VOL. XXXIV.—JULY, 1838. 
NEW HAVEN: 
Sold by A. H. MALTBY and B. & W. NOYES.—Philadelphia, CAREY & 
HART and J. 8. LITTELL.—Baltimore, Md., N. HICKMAN.—New York, 
G. & C. CARVILL & Co., No. 108 Broadway, and G. S. SILLIMAN, No. 45 
William St.—Boston, C. C. LITTLE & Co.— London, JAMES S. HODSON, 
No. 112 Fleet St.— Paris, CHARLES DUPERRON, Rue Mabillon. 
PRINTED BY B. L. HAMLEN. 
2 
