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AMERICAN JOURNAL & 
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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. i 
and of the Archzological Soc., Athens, Greece; Lit. and Hist. Soc., 
Quebec; Mem. of various Lit. and Scien. ps in the U. States. 
AIDED BY 
BENJAMIN SILLIMAN, Jr., A.B. 
Assistant in the department of Chemistry, Mineralogy and Geology in Yale College; Cor. a 
of the Meteorological Soc., London; Sec. of the Yale Nat. Hist. Soc.; Mem. of the Con 
cad. of Arts and Sci.; Cor- Mem. of the Lyceum of Natural History, 
New York; of the Boston Society of Natural History, &e. 
VOL. XXXVIII.—APRIL, 1840. 
NEW HAVEN: 
Sold by A. H. MALTBY and B. & W. NOYES.—Philadelphia, CAREY & 
HART and J. 8. LITTELL.—Baltimore, Md., N. HICKMAN.—New York, 
CARVILL & Co., No. 108 Broadway, and G. S. SILLIMAN, No. 44 Wil- 
liam St.—Boston, C. C. LITTLE & Co.—London, JAMES S. HODSON, 
No. 112 Fleet St., and WILEY & PUTNAM, 35 Paternoster Row.—Paris, 
J. B. BAILLIERE, Libraire, Rue de L’Ecole-de-Médecine, No. 13 bis.—Ham- 
burgh, Messrs. NESTLER & MELLE. 
JUL 27 1939 
