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THE /, / V' 



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AMERICAN JOURNAL 





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SCIENCE AND ARTS 



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CONDUCTED BV 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. Chejn,, Min., &c. in Yale Coll.; Cor. Mem. Soc. Arts, Man, and Com.; uud 



For. Mem. GeoL Soc, London; Mem. Roy, Min. Soc, Dresden; Imp. 



Agric. Soc, Moscow; Hon. Mem. Lin. Soc, Paris; Nat. Hist. 



Soc Belfast, Ire.; Phil, and Lit. Soc Bristol, Eng.; 



Mem. of various Lit. and Scien. Soc in America, 



VOL. XVIII. -JULY, 1830. 



NEW HAVEN: 



Published and Sold by HEZEKIAH HOWE and A. H. MALTBY. 

 Philadelphia, E. LITTELL & BROTH EU.—JVeu? York, G. & 0. & H. 

 CARYILL.— Boston, HILLIAUD, GRAY, LITTLE & WILKINS. 



PRINTED B¥ HEZEKI^Ul HOWE. 



Mo.Bot. Garden 



i90L 



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