^^^^ (LX- ^-^'» / ^ 



THE 



AMERICAN JOURNAL 



or 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



Prof. Chem., Min., &c. in Yale Coll. ; Cor. Mem. See. Arte, Man. and Com., and For. Mem. Geol. 

 Soc, Hon. Mem. Br. and For. Abor. Protec. Soc, and of Scien. Soc, Mem. Geol. Soc, and of the 

 Roy. Inst, of Gr. Brit., London ; Hon. Mem. Lin. and Statis. Socs., Paris ; Mem. Roy. Min. Soc, 

 Dresden ; Nat. Hist. Soc, Halle; Hon. Mem. Agric. Soc, Bavaria; Imp. Agric. Soc, Moscow; 

 Nat. Hist. Soc, Belfast, Lre. ; Phil, and Lit. Soc, Bristol ; and Hon. Mem. Roy. Sussex Inst., 

 Brighton, Eng. ; Cor. Mem. of the Nat Hist. Soc, and of the AroliEeological Soc, Athens, 

 Greece ; Lit and Hist. Soc, Quebec ; Member of various Literary and Scientific Societies in 

 the United States. 



AIDED BY 



BENJAMIN SILLIMAN, Jr., A.M. 



Assistant in the department of Chemistry, Mineralogy and Geology in Yale College ; Sec. 



of the Yale Nat Hist Soc; Mem. of the Conn. Acad, of Arts and Sci. ; Cor. 



Mem. of the Lyceum of Natural History, New York ; of the 



Boston Society of Natural History, &e. 



VOL. XXXIX.— OCTOBER, 1840. 



NEW HAVEN: 



-Philadelphia, CAREY & 

 HICKMAN.— ./Veif) York, 

 SILLIMAN, No. 44 Wil- 



Sold by A. H. MALTBY and B. & W. NOYES.- 

 HART and J. S. lATTYLL.— Baltimore, Md., N. 

 CARVILL & Co., No. 108 Broadway, and G. S. 

 liana St.— Boston, C. C. LITTLE & Co.— London, WILEY «& PUTNAM, 

 No. 35 Paternoster Row, and JAMES S. HODSON, 112 Fleet St.— Paris, 

 HECTOR BOSSANGE & Co., No. 11, Giuay Yohaire.— Hamburgh, Messrs. 

 NESTLER & MELLE. 



PRINTED BY B. L. HAMLEN. 



#^ '^''"%i 



