

THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



PROFESSOR SILLIMAN 



AND 



BENJAMIN SILLIMAN, Jr. 



VOL. XLIL— No. 2.— APRIL, 1843. 



FOR JANUARY^ FEBRUARY, AND MARCH, 1842. 



(TO BE CONTINUED QUARTERLY.) 



NEW HAVEN; 



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 corner of John St. and Broadway, and G. S. SILLIMAN, No. 49 Wall St.— 

 Boston, C. C. LITTLE «fe Co.— London and JVew York, WILEY & PUTNAM, 

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 HECTOR BOSSANGE & Co., No. 11, Quay Voltaire.— flamJwr^A, Messrs. 

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PRINTED BY B. L. HAMLEN. 



Published at New Haven, laarcb 26, 1S42. 



