CONTENTS. V 



Page 



Proceedings of the Geological Society 211 



Zoological Society 230 



Entomological Society 236 



Mr. Breithaupt's Mineralogy — Observations on the Tempera- 

 ture of Artesian Wells in Degrees of the Centigrade Ther- 



meter, the Depths being expressed in Metres 237 



M. Jacobson on the Physical and Therapeutic Properties of 

 Chromate of Potash — M. Berzelius's Discovery of Chrenic 

 and Apochrenic Acids in the Mineral Waters of Porta .... 238 



Scientific Books 239 



Meteorological Observations 240 



NUMBER XXVIII.— OCTOBER. 



Mr. C. Blackburn on a Method of determining the Number of 



Signals which can be made by the Modern Telegraphs .... 241 

 Mr. W. G. Carter's Remarks on Mr. Beke's Papers on the 



Gopher -wood, and the former Extension of the Persian Gulf. 244 

 Mr. Faraday's Experimental Researches in Electricity. — Se- 

 venth Series {continued) 252 



Mr. J. Nixon on the Tides in the Bay of Morecambe 264 



Mr. J. Barton on the Influence of high and low Prices on the 



Rate of Mortality 278 



On the Reappearance of Halley's Comet. 284 



Rev. P. Keith on the Internal Structure of Plants [concluded) 284 



Proceedings of the Geological Society 292 



Linnsean Society 298 



Royal Astronomical Society 301 



Zoological Society 311 



M. Persoz on the Preparation of Osmium and Iridium 314 



M. Gay-Lussac on the Purification of Carbonate of Soda — 



M. Magnus on the Fossil Wax of Moldavia 316 



Mr. Sturgeon's Caution to Experimenters with the Electrical 



Kite 317 



Mr. W. Thompson on some remarkable Crystals of Snow. ... 318 



Obituary : Professor Harding 319 



Meteorological Observations ; 320 



NUMBER XXIX.— NOVEMBER. 



Mr. H.F. Talbot's Experiments on Light 321 



Mr. Faraday's Experimental Researches in Electricity. — Se- 

 venth Series {continued.) 334 



