CONTENTS. Vll 



Page 

 M. Wiegmann's Notice of new Discoveries of Ehrenberg re- 

 specting the Bacillariae 4-4-8 



Meteorological Observations taken at Bermuda, in July, August, 

 anil September, 1836 3 and on September 2lst, 1836, in ac- 

 cordance with the Suggestions of Sir John Herschel : pre- 

 pared and communicated by Dr. Dalton 449 



Mr. E. Solly on the Palo de Vaca or Cow Tree of South America 452 

 Mr. W. G. Horner's New Demonstration of an original Propo- 

 sition in the Theory of Numbers 456 



Obituary Notice of Mr. Horner 459 



Rev. N. S. Heineken's Description of the Galvanic Shock- 

 Multiplier :, 460 



Mr. J. J. Sylvester's Analytical Development of Fresnel's Op- 

 tical Theory of Crystals 461 



Proceedings of the Zoological Society 469 



British Association for the Advancement 



of Science: Meeting of 1837, at Liverpool 474 



Royal Geological Society of Cornwall. . . . 478 



New Books — Bibliographical Bulletin 481 



On the Solubility of Arsenious Acid ; by Mr. Taylor, Lecturer 



on Chemistry at Guy's Hospital 482 



On Stearic iEther and Stearate of Methylene, by M. Lassaigne 487 

 Meteorological Observations 487 



NUMBER LXX.— DECEMBER. 



Mr. R. Warington on the Action of Chromic Acid upon Silver, 



and its Combinations with the Oxide of that Metal 489 



Mr. Lubbock on the Variation of the Arbitrary Constants in 

 Mechanical Problems 492 



Mr. T. Exley's Remarks on M. Mossotti's Theory of Physics, 

 suggested by Mr. Babbage's Notice of the same 496 



Dr. Kane on the Action of Ammonia on the Protochloride and 

 Peroxide of Mercury 504 



Mr. A. Connell on the Nature of Lampic Acid 512 



Substance of a Communi«ation on the Temperature of some 

 Mines in Cornwall and Devonshire, made by R. W. Fox to 

 the Royal Geological Society of Cornwall, at their last 

 Annual Meeting 520 



Mr. Tovey on an alleged Demonstration of Fresnel relative 

 to the Wave-surface in the Theory of Double Refraction . . 524 



Prof. Meyen's Report of the Progress of Vegetable Physio- 

 logy during the Year 1836 {continued) 524 



Mr. J. J. Sylvester's Analytical Development of Fresnel's Op- 

 tical Theory of Crystals 537 



Prof. Forbes's Letter to Richard Taylor, Esq., one of the 

 Editors of the Lond. and Edinb. Philosophical Magazine, oc- 

 casioned by M. Melloni's Paper on the Polarization of Heat, 

 in the Annates de Chimie for May 1 837 542 



Prof. Schcenbein on the peculiar Chemical Inactivity of Bis- 



