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Fo a 
AMERICAN JOURNAL 
OF 
SCIENCE AND ARTS. 
CONDUCTED BY 
PROFESSOR SILLIMAN 
AND 
BENJAMIN SILLIMAN, Jr. 
VOL. XLIX.—OCTOBER, 1845. 
—" HAVEN: 
Sold by H. DAY.—Boston, LITTLE & BROWN and W. H.S8. JORDAN.— 
New York, WILEY & PUTNAM, and C. 8. FRANCIS & Co.—Philadelphia, 
CAREY & HART, and J. 8S. LITTELL.—Baltimore, Md., N. HICKMAN.— 
London, WILEY & PUTNAM.—Paris, HECTOR BOSSANGE & Co.— 
Hamburgh, Messrs. NESTLER & MELLE. 
PRINTED BY B. L. HAMLEN. 
