vi CONTENTS. 
Page. 
XI. Observations on Sulphurous Ether, and Sulphate of 
Etherine, (the true Sulphurous Ether i by R. gre 
M. D., Prof. Chem. Univ. Penn. 275 
XII. Of the Reaction of the Essential Oils with Sulphutedd 
Acid, as evolved in union with Ether in the process of 
Etherification, or otherwise; by Prof. R. Harr, M.D. 281 
XIII. Of Sassarubrin, a Resin evolved by Sulphuric Acid from 
Oil of Sassafras, which is remarkable for its efficacy in 
reddening that acid in its concentrated state; by Prof. 
R. Hare, - - - - - - - se = 
XIV. Meteorological Register kept at Matanzas; by A. Mat- 
LORY, Fe iene - . ts - i= 287 
XV. On the Elevation of Mountain Ranges, - - - 290 
XVI. Notes on Chemistry, &c.; by Prof. J. W. Battey, 292 
XVII. On the Elevation of the Banks of the biti ilci in 
1811; by F. C. Usuer, - - 294 
“XVIII. Description of the Argulus er a new parasitic 
Crustaceous animal, ith — ) by J. D. Dana and 
‘ ERRICK, - 297 
XIX. Thinslétion of a Memoir on ai erie of Plants, 
with prefatory remarks on the progress of discovery 
relative to vegetable fecundation; by Asa Gray, M.D. 308 
XX. Additional Remarks on the Tails of a s Comet; by 
Prof. B. F. Josuin, —- 324 
XXI. Proceedings of the British Reside tions at Brist in 
August, 1836, = - - - - 
XXII. Description of a new species of festh water Porivisé, 
inhabiting the Columbia River; by Ricuarp geoph 
M.D. F.L.S., &c. - - - - - 382 
XXIII. Notice of the rita ora or horned ame ; by 
R. Harran, M.D., - 3 
XXIV. Description of a new species of neadined, of ‘the sissies 
Rodentia, re the — States; by R. Har- 
LAN, M.D. - a - - 385 
MISCELLANIES.—DOMESTIC AND FOREIGN. 
1. On the Meteoric Shower of November, 1836, - - 386 
2. Proceedings of the Maryland inst of Science and Lite- 
rature, 1836, ks es ig = g* - = 
Se ee ee ar 
