ry, 1 te 
brid Obsornato te in 1848, 1849, 1 
304 Bibliography. 
EAKIN: Florigraphia Brittanica, or Engravings and Descriptions of the flower- 
ing plants and Ferns of Britain. 4 vols. 8vo. Vols. 1-3 each 30s. or colored 57s. 6d. 
vol. 4 14s., ee 16s. 
exautt: Elements of Chemistry, in course of translation from the French 
and to be published by Hogan & Thompson, Philadelphia 
L. Acassiz: The Clas sificati¢n of Insects from Embryologicl data. From Vol. I, 
i Kno 
P. SorawEavx: La Chimie ae Cultivateur. 1 va is mo. Paris. 2fr. 
Lresie and Korr: Annual Report of the Progress of Chemistry for 1847-48. 
Part V, contain ~m Chemis e ac ng to = ‘Arts and Manufactures, Agricultural 
Lon 
THE a atin : ae Aral . “NO 11, June 27, 1850.—On the 5th 
Comet of 1847; B. A. Gould, Jr—lst i pags of 1850.—On the employmen nt of the 
theorem, “ small angles are oe to ee sines:” Prof. W. Chauvenet—Ne 
;Planet.—From letters of Prof. Se Resithiee o the Editor—Colors of Stars; Prof. 
Sestini, 2, Jul ini. — ents 
IT 
—Piruary 1850. p. 241. Comparatite value of 
: The Walrus eo - to ae a hy fps spr 
3 on he a. ion of the alluv of the 
\nalysis of Vermiculite by R. Oriedey and ‘destin 
ksonite identi cal with Prehnite; @. Z: Jac —p. 24 
jew Jersey; H. D. Rogers, March— ee "New ou 
isetts ; Girard. —p. 252. New Shells of se Explor- 
rycina, 6 of Tellina, 1 Psamm mobia, 8 Don ) f 
On 
é th pass lime 
R 259. Capacity of the Cranium of the Troglodytes 
alt lakes; H. D. Rogers—p. 260. a a 
Sd ta 5 
bo 
F 
ere 
aS 
24 
i] 
a sp’ cre <P 
OCTO BER. New g pcan of the ine Apocynes 
