CONTENTS Vv 
CHEMICAL SCIENCE. 
Page. 
1. Robiquet on a new metallic dye, - - - - - 197 
2. Purple precipitate of silver, gold, &c. - - - 198 
3. On the manufacture of sulphuric ether, - - - 199 
MECHANICAL PHILOSOPHY. 
1. Remarks on the floating ice met with in remarkably low lati- 
tudes in the South Seas, - - - - - - 200 
2. Red beets, - - - - - - - - - 201 
3. Feeding of cattle, - - - - - - - 202 
STATISTICS. 
1. Academy of St. Petersburgh, - - - - - 203 
2. Astronomical memoranda, - - - - ~ - 204 
=—-O-—— 
Art. I. 
XIII. 
NUMBER ITI. 
On the Water Courses, and the Alluvial and Rock Forma- 
tions of the Connecticut River Valley; by Atrrep Smit, 205 
. Memoir of the Life of Tuomas Youne, M. D., F.R.S., &c. 232 
Ill. 
An Essay on the Chemical Nomenclature of Prof. Bren- 
ZELIUS, prefixed to his treatise on Chemistry. Trans- 
lated from the French, with notes, by Prof. A. D. Bacnr, 248 
. On the law of the partial polarization of light by re- 
flexion; by Davin Brewster, LL.D. F.R.S.L.&E., 277 
. Notice of new Medical Preparations; by G. W. Carrenter, 293 
. Meteorological Table; by Gen. Martin Fietp, - 298 
. Observations on the Primitive and other Boulders of 
Ohio; by Darius and Increase A. Larwam, - - 300 
. On the method of tracing oval arches from several cen- 
tres; by Epwarp Mitter, A. M., Civil Engineer, 303 
. On the Chemical Composition of the Brown Lead Ore; 
by C. Kersten, of Freyberg. Translated from the 
German by Cuartes U. Sueparp, - - = 307 
. Description of the Nine Inch Conical Rain ve by S. 
De Wirt, mseeriieg WE Ee AH ater ee - 321 
An account of several descents in a Diving Bell, at Ports- 
mouth, N. H.; by the Rev. Timorny Atpen, - 325 
. On the Artificial Preparation of Cold Medicinal Waters ; 
by Wm. Meape, M. D. - - - - - 330 
On the Malaria of the Campagna di Roma, - 336 
