THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



PROFESSOR SILLIMAN 



AND 



BENJAMIN SILLIMAN, Jr. 



VOL. XL.— No. 2.— APRIL, 1841. 



FOR JANUARY, FEBRUARY, AND MARCH, 1841. 



(TO BE CONTINUED QUARTERLY.) 



<e if^ 



NEW HAVEN: 



Sold by A. H. MALTBY and B. & W. N0YE8.—PMJadelphia, CAREY i& 

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PRINTED BY B. L. HAMLEN. 



Published at New Haven, IVarch 39, 1S41. 



