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THE 



AMEEICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



PROFESSOR SILLIMAN 



AND 



BENJAMIN SILLIMAN, Jk. 



YOL. XLIII.— Q9^Q - B ' Bf» , 1842. 



(TO BE CONTINUED QUARTERLY.) 



NEW HAVEN: 



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iNSr/; 



