AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED BY 



BENJAMIN SILLIMAN, M. D. LL. D. 



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



and For. Mem. GeoJ. Soc., London ; Mem. Gcol. Soc, and Hon. Mem. Lin. and Statis. Socs., 



Paris ; Mem. Roy. Min. Soc, Dresden ; Nat. Hist. Soc, Hulle ; Imp. Agrio. Soc, Moscow ; 



Nat. Hist. Soc, Belfast, Ire. ; Phil, and Lit. Soc, Bristol, Eng. ; Hon. Mem. Roy. 



Sussex Inst., Brighton, Eng. ; Cor. Mem. of the Nat Hist. Soc, and of the 



Archceolegical Soc, Athens, Greece; Lit. and Hist. Soc, Quebec; 



Mem. of various Lit. and Scien. Soc. in the U. States. 



AIDED BY 



BENJAMIN SILLIMAN, Jr., A. B. 



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



of the Meteorological Soc, London ; Sec of the Yale Nat. Hist. Soc, Mem. of the Conn. 



Acad, of Arts and ScL ; Cor. Mem. of the Lyceum of Natural History, New York, &c. 



VOL. XXXVL— No. 1.— APRIL, 1839. 



FOR JANUARY, FEBRUARY, AND MARCH, 1839. 



NEW HAVEN: 



Sold by A. H. MALTBY and B. & W. NOYES. —Philaddpkia, CAREY & 

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PRINTED BY B. L. HAMLEN. 



PubUslied at New HaveD, AprU 20, 1§89. 



