VI CONTENTS. 



NUMBER II. 



Page. 

 Art. L On the Reduction of Iron and Silver Ores, with the prin- 

 cipal Silver Mines of Mexico and S. A. ; by Lt. W. W. 

 Mather, of the U. S. Mil. Acad., West Point, 213 



II. Miscellaneous Notices, in a letter from an American Na- 

 tional Ship, - - - - - - - 237 



III. Miscellaneous Communications from Dr. Hare, - 246 

 £V. Apparatus and processes ; by Dr. Hare, - - 247 



V. Remarks on the error of supposing that a communication 

 with the Earth, is necessar}'^ to the efficacy of Electri- 

 cal Machines ; by Dr. Hare, - - - - 253 



VI. On Architecture ; by Daniel Wadsworth, Esq., - 257 

 VII. On the relation between a Machine and its Model ; by 



Edward Sang, Edin., - - - - - 264 



VIII. Consideration on the Bitterness of Vegetables, etc.; by 



Dr. J. B. A. GuiLLEMiN, Pari?, 1832. - - 273 



IX. On the Eupatorium Huaco ; by Prof W. R. Johnson, 279 

 X. Memoir on the elastic force of the vapor of Mercury, 



at different temperatures; by M. Avogadro, - 286 



XI. On the application of the Fluxional Ratio to particular 

 cases; and the coincidence of the several orders of 

 Fluxions, with the binomial theorem ; by Elizur 



Wright, Esq. - - 298 



XII. On some improvements on Brunner's process for Po- 

 tassium, and in the means of preserving that metal; by 

 Dr. Hare, 312 



XIII. Improved Syphons ; by Dr. R. Hare, - - 317 



XIV. Stereotype Printing. — An original paper of the late 



Lieut. Gov. Colden, with some account of stereotyping, 

 as now practised in Europe, kc; by the Editors of the 

 Am. Med. and Philos. Register, . _ . 319 



XV. Notice of the most simple means of employing dead ani- 

 mals ; by Prof. M. Payen, . ... 326 

 XVI. An Essay on Gypsies ; abridged from the Revue Encyclo- 



pedique, Nov. 1832; by J. Griscom, - - 342 



XVII. On the Collision of two Comets ; — Comet of July, 1832; 



by J. J. Littrow, . - - - 346 



XVIII. Description of the Bare Hills near Baltimore; by H. H. 



Hayden, M. D., 349 



XIX. Meteorological Table; by Gen. Martin Field, - 361 



