VI CONTENTS. 



Page 

 Rev. W. Ritchie's Remarks on certain proposed Improvements 



in the Magneto-Electric Machine 222 



Proceedings of the Zoological Society 224 



British Association for the Advancement of Science 228 



Aurora Borealis observed in the Isle of Wight, on August 10th 230 



G. Bonnet on the Reducing Powers of Arsenious Acid 230 



Rudernatsch on the Composition of Plagionite 232 



R. Hermann on some Triple Combinations of Chloride of Os- 

 mium, Iridium and Platinum, with Chloride of Potassium 



and Muriate of Ammonia 232 



Notice of the Life and Contributions to Science of the late M. 



Nobili 234- 



Meteorological Observations 239 



NUMBER LIV.— OCTOBER. 



Mr. C. Williamson on the Limestones found in the Vicinity of 



Manchester 241 



Mr. A. De Morgan on the relative Signs of Coordinates .... 249 



Rev. J. H. Pratt's Reply to Disjota's Remarks 254 



Mr. J. D. Smith's Experiments on the supposed new Metal 



Donium 255 



Dr. Schoenbein's Further Observations on the Action of Nitric 



Acid upon Iron 259 



Mr. E. M. Clarke's Description of his Magnetic Electrical 



Machine 262 



Mr. J. F. W. Johnston on the Iodides of Gold 266 



Mr. J. Bishop's Experimental Researches into the Physiology 



of the Human Voice (continued) 269 



Dr. H. Falconer and Capt. P. T. Cautley on the Sivatherium 

 giganteum, a new Fossil Ruminant Genus, from the Valley 

 of the Markanda, in the Sivalik Branch of the Sub-Hima- 

 layan Mountains {cojicluded) 277 



Mr. F. W. Mullins's Observations on the Construction of Vol- 

 taic Batteries; with a Description of a Battery exhibited at 

 the Royal Institution of Great Britain, June 3, 1836, in 

 which an uniform and powerful current is sustained for any 



period required 283 



Rev. W. Ritchie's Remarks on Mr. Rainey's Theory of Mag- 

 netic Reaction 287 



Mr. H.F.Talbot on the Optical Phaenomena of certain Crystals 288 



Proceedings of the Royal Astronomical Society 291 



Zoological Society 298 



British Association for the Advancenient of Science ... .... 312 



Mr.J.W. Doebereiner on several new combinations of Platinum 314 



On Decrepitation 316 



Atomic Contusion. — Monohydratcd Sulphocarbetheric Acid 317 



Hydrosulpiiuric and Hydroselenic ^Ethers 318 



Meteorological Observations 319 



