AMERICAN JOURNAL 
SCIENCE AND ARTS, 
conmagEeD. 5¥ 
BENJAMIN SILLIMAN, M.D. LGD. 
Prof. pac Min., &c. in Yale Coll. ; Cor. Mem. Soc. Arts, Man. and Com., Cor. Mem. Met. Soc., 
and F 
r: Mem.€ eol. Soc., Hon. Mem. Br. and For. Abor. Protec. Soc., and of Scien. Soc., Lom 
a ne Geol, Soc., and Hon. Mem. Lin. on Statis. Eos. io rina ie “ie oa Soc., 
Hist. Sec. p. Agric. Soc., 
t. Hist. 
Mem. Roy. Sussex Inst., Brighton, Eng.; Cor. Mem. of the Nat Hist. Soc., 
and of i Archeological Soe., Athens, ferret Lit. and Hist. Soc. 
Quebec; Mem. of -various Lit and Se Soc. in the U. States. 
AIDED BY oe ex . 
BENJAMIN SILLIMAN, fete A.B. 
Assistant in the department of Chemistry, garmanA rane eines in Yale College; Cor. — 
of the Meteorological Soc., London; Sec. of th Hist. Sec.; Mem. of the Con 
Acad. of 
rts and Sci. ; Cor. Mem. of a ac n of Natural History, 
few York; of the Boston Society af Natural History, &c. 
VOL. XXXVIIL—No. 2—APRIL, 1840 / 
FOR JANUARY, FEBRUARY, AND MARCH, 1840. Fas 
NEW HAVEN: 
Sold by A. H. MALTBY and B. & W. NOYES.—Philadelphia, CAREY 
HART and J. 8. LITTELL.—Baltimore, Md., N. HICKMAN.— New York 
eagd fae & Co., No. <> sien ay, and G 8. SILLIM — on 44 Wil- 
— Boston, “Co.— pais f ODSON, 
= Fleet St, a WILEY & PUTNAM, 35 Paternoster ees —Paris, 
BAILLIERE, Libraire, Rue de L’ a No. 13 bis.—Ham- 
_ NESTLER & MELEE. 
