Ve CONTENTS. 
Method of preserving the Colour of the purple Cabbage, om 
G. T. Bowen, - 
Description and Analysis of ‘thie Sillimanite, a new ‘mince 
by G. T. Bowen, 
Analysis of a Siliceous fydeate of Casper from N. Hevea 
with a notice of localities of Bpodamete in the U. aaa 
by G. T. Bowen, - 
On the Theory of the Corsten a the Theriotvciek , by 
Prof. J. Adams, - - - - - 
Remarks on several papers published in former volumes of 
this Journal, - - - - - - - 
On the Precession of the Equinoxes, = 
Account of a new Air Pump, by Joseph H. Patten, - 
Electro-magnetic and Galvanic Experiments, by Prof. R. 
Hare, Sa gists - - - - - - 
Remarks upon Prof. Vanuxem’s paper on fused Charcoal, 
Description of two new Voltaic Batteries ; by Prof. De Butts, 
Remarks on Mr. Patten’s Air Pump; by Prof. J. F. Dana, 
On the Heat produced by Friction; by J. T. Watson, 
On the stopping ef a eononncdt Clocks ; by hs W. How- 
ard, - - 
Reply to Mr. Guinky on 1 Oral Motion, - “ - 
The formation of Crystals in Geodes, - 
Remarks perl asl Mr. Vanuxem’s Memoir ; by Prof. R. 
Hare, - 
Notice of ‘utente Ge from Catia Seed ; by Prof. D. 
Olmsted, - - 
Analysis of an Hydrate of rods by A. Seybert, - 
Analysis of the Melanie; from Sussex Co. N. J. ; ae F. 
Seybert, - 
Remarks on Tests ca Cobalt ; 5 ey Pee Je F. Datta 
Notice of the manufacture of the Alkaline Salts of Commerce ; 
by Dr. G. A. Rogers, - - ° 
Meteorological Notice ; by Martin Field, - - 
Pres. Dwight on the West and North West Winds of New- 
England, - - - - 
Observations on the Comet af 1823-24, - - 
MISCELLANEOUS. 
Notice and Review of the “ Reliquiae Diluvianae,”” - 
Print of Col. Trumbull’s Picture of the Declaration of Inde- 
pendence, - - : - - - - 
Excursion among the White Mountains, by James Pierce, 
Notice and Review of the “ Reliquiae Diluvianae,”’ 
Mr. Finch on the Forts around Boston, - - : 
Dr. S. Akerly on the Language of Signs, - - - 
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