a a ee a a, ale 
Art. I. 
Il. 
III, 
IV. 
CONTENTS. Vv 
NUMBER II. 
Page. 
A Description of a Magnetic Electrical Machine, in- - 
vented by E. M. CrarkE, - - - - - 213 
Description of E. M. Cuarxe’s Electrepeter, - - 224 
Some observations in Holland, connected with the Prai- 
rie region, - - - - - - - - 226 
Description of an Air Pump of a new construction, which 
acts either as an Air Pump, or a Condenser, or as both; 
enabling the operator to exhaust, to condense, transfer 
a Gas from one cavity to another, or to pass it through 
a Liquid; by R. Harz, M. D., &ce. &c. - - 237 
. Process for Nitric Ether, or Sweet Spirits of Nitre, by 
means of an approved apa ; by R. Hare, M. D., 
&e. &e., - - - - - - - 241 
. On the Cause of the Collonse of a Reservoir while ap- 
parently subjected within to a great Pressure from a 
Head of Water; by R. Hare, M. D., &c. &e., - 242 
VII. Sundry Improvements in Apparatus, or age ape eo 
by R. Hare, M. D., &c. &e., - - - 244 
VIII. Notice of Oriental Minerals; by Prof. F. Hair sh the 
Editor, - - - - - - - - 249 
IX. Meteoric Iron, = : - - - - - 257 
X. On Natural Magic, - - - - - - 258 
XI. Meteorological Sketches, - - - - - 261 
. Seventh Meeting of the British Association for the Ad- 
vancement of Science, - - - - - 265 
. Remarks on the occurrence of the Aurora Borealis in 
Summer; with an abstract of Huxham’s Auroral Reg- 
ister from 1728 to 1748; by Epwarp C. Herrick. 297 
. Some account of two visits to the Mountains in Essex 
County, New York, in the years 1836 and 1837; with 
a Sketch of the Northern sources of the Hudson; by 
W.C. REDFIELD, - - - 301 
XV. Contributions to English pemcoe ; i Prof. J. W. 
GIBBs, - = - - - - - 324 
XVI. Lectures and Remarks of Dr. Gives MANTELL, - 328 
XVII. Influence of the Great Lakes on our Autumnal Sunsets ; 
by Witiis GayLorp, - - - - - 335 
XVIII. Some Remarks on the Genus Paradoxides of Brong- 
niart, and on the necessity of preserving the Genus 
