vi CONTENTS. 
: 6. ene and Geology.—On a new Spodumene poets at Norwich, Mass., by 
sel by M. Aveeypre, 260.—Purification and properties of Chloroform, 
f. Wu. Grecory, M.D., 261.—On the preparation of Chlorate of Potash: _ 
lee Acid from Biwalate of Ammonia, by M. Dessaiengs, 262 -—Stibethyle, 
by C. Lowie and E. Scuweitzer : Action of Nitric Acid on Rhubarb, 263.— 
On the Atomic Weight of Molybdenum, by N. J. Beruiy, 264. 
RTWELL, and E. Hircucock, Jr., 264.—Age of the Nomihnlits tic forma- 
tion of the Alps, 265.—On the Geographical Limits - the Chalk Formation, by 
Leorotp von Buc, 268. 
Zoology. —Contributions to the Natural History of the Tiseske of sige a 
ica, by L. Acassiz —On the Structure of Sysmolina, by W. B. Carpen- 
rer, M.D., FRS.,275. sa 
Miscellaneous Intélligence—On. the Seer. Races of Oriental Adice, by M. Srr- 
res: Fabrication of Zine. compounds not injurious to health, 276.—Anchor-Ice, 
by Prof. C. Dewey, 277.—Discove very of the Great Lake “Ngami,” of South 
_ Africa, 278.—Comparison of Fahrenheit and Centigrade Thermometers, 231.— 
“Discovery of an Infusorial Stratum i in Florida, by Prof. J. W. Bamey: On the _ 
by p A. Matong, 285. steed Statuary, 286,—British Association: Sun and 
- Moon: Ona cloud of dust which obscured the sun for two days in oe on 
com 2 and 30th of April, 1840, during a clear sky and quiet weather, by Eu 
: : American Zoological Journal : Discovery of the Antarctic Conia 
Mecting of the American Association for the Advancement of Bei cience at New _ 
Haven, 7,287 Proceeding of the American Association for th 
“| Science; thitd Mee: eeting, held at Charleston, 8.C., M eee esrb —Editorial - 
notice with reference to edn, on the Electro-Chronograph, in Volume III, 
de | e, 296.—Christian VIII. King of Denmark, 297. 
Bibliograph 1y—Tabule Mage Chemical Tables for the Caleultion of Quan- 
titative cape of H. Rose, 298.—First Biennial Report on the Geology of ~ 
Alabama; by M. Tuomey, 299.—A Treatise of Plane aid Spherical Trigonome- 
try; by Wiirram Cuauvenet, A.M.,300.—A descriptive account of the. Fresh- 
water Sponges of the Island of Bombey with observations hei 
and development; by H. J. Carrer, Esq., 301.—Recherches ‘Anato 
Zoologiques faites pendant un Vous sur les cotes de m bp et sur iad divers 
— du littoral de la France; par MM. Mintye Epwar av 
s,and Emrie Buancuarv: Les Alpes, Journal des ‘Sciences gs am 
isis, Medicales, Physiques et Astronomiques, 303. 
NUMBER XXX. 
. 
XXVI. On the Practica Phenomena of tieitets Houses by 
whe Extas Loomis - os ee 2 - 
