^0^ 



THE 



' AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



M^Ql^ 



CONDUCTED BY 



PROFESSOR SILLIMAN C- 



AND 



BENJAMIN SILLIMAN, Jr. 



VOL. XLYIIL— APRIL, 1845. 



NEW HAVEN: ' - 'V 



Sold by B. NOYES— Eosiore, LITTLE & BROWN and W. H. S. JORDAN.— 

 mw York, WILEY & PUTNAM, C. S. FRANCIS &, Co., and G. S. SILLI- 

 MAN.— Philadelphia, CAREY & HART and J. S. LlTTELh.— Baltimore, 

 Md., N. HICKMAN.— ioTidon, WILEY & PUTNAM.— Paris, HECTOR 

 BOSSANGE & Co.— Hamburgh, Messrs. NESTLER & MELLE. 



PRINTED BY B. L. HAMLEN, 



