AMERICAN JOURNAL 
OF 
SCIENCE AND ARTS. 
CONDUCTED BY 
PROFESSOR SILLIMAN 
AND 
BENJAMIN SILLIMAN, Jr. 
VOL. XLV.—No. 1.—JULY, 1843. 
FOR APRIL, MAY, AND JUNE, 1843. — 
NEW HAVEN: 
Sol by B. NOYVES.—Boston, LITTLE & BROWN and W. H. 8, JORDAN.— 
cw York, WILEY & PUTNAM, C.S. FRANCIS & Co., and G. §. SILLI- 
prontidage Philadelphia, CAREY & HART and J. 8. LITTELL. Baltimore 
_Md., N. HICKMAN.—London, WILEY & PUTNAM.—Paris, HECTOR 
BOSS zE & > Se caemet ale Messrs. NESTLER & MELLE. 
PRINTED BY B. LL. HAMLEN. 
crostini mci 
Published at New Haven, July 15,1843. © 
