THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



PROFESSOR SILLIMAN 



AND 



BENJAMIN SILLIMAN, Jr. 



VOL. XLVIIL— No. 2.r^APRIL, 1846. 



FOR JANUARY, FEBRIJARY, AND MARCH, 1845. 



WITH TWO PLATES. 



J 



i. 



f 7 



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NEW HAYM: 



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PRINTED BY B. ^. H4,MLEN. 



Pnblislied at ITew Braven, April 1, 1845. 



