yi CONTENTS. 



Page 



Preparation of Iodate of Potash, by M. Mellon 334 



Professorship of Geology in University College, London .... 335 



Meteorological Observations for August 1841 335 



Table 336 



NUMBER CXXV.— NOVEMBER. 



M. Dumas on the Chemical Statics of Organized Beings 337 



Miss Zornlin on the Periodical Shooting Stars, and on Shooting 



Stars in general 347 



Mr. M. P. Moyle on an Analysis of the Atmosphere of some 



of the Cornish Mines. 357 



The Rev. R. Murphy's Remarks on Primitive Radices 369 



Messrs. C. Hare and M. H. Boye on the Perchlorate of the 



Oxide of ^Ethule, or Perchloric ^Ether 370 



Prof. Powell's Note on the Theory of Light 372 



Mr. W. Petrie's Results of some Experiments in Electricity and 



Magnetism 374 



On a Theorem given in the Philosophical Magazine for August 380 

 Sir W. R. Hamilton on a Mode of deducing the Equation of 



Fresnel's Wave 381 



Remarks on M. Mossotti's Theory of Molecular Action 384 



Dr. S. M. Brown's Observations on Dr. Brett and Mr. Smith's 



Experiments on the alleged Conversion of Carbon into 



Silicon 388 



Mr. E. Solly's Description of an Electric Thermometer 391 



Proceedings of the Geological Society , 394 



Zoological Society 403 



London Electrical Society 404 



Notice of Beard's Patent for Improvements in Apparatus for 



obtaining Likenesses and Representations of Nature, &c. . . 405 



On the Polished Rocks of Fontainbleau, by M. Durocher .... 409 



On the Composition of the Brain of Man, by M. Fremy 411 



Action of Peroxide of Iron on Potash, by M. Fremy 412 



Preparation of Guaiaic Acid, by M. Thierry 413 



London Institution 414 



Scientific Books 414 



Meteorological Observations for September 1841 415 



Table. .'...' 416 



NUMBER CXXVL— DECEMBER. • 



Mr. Murchison's First Sketch of some of the principal Results 

 of a Second Geological Survey of Russia. 417 



