CONTENTS OF VOL. XXXIV. 



(FIFTH SERIES ). 



NUMBER CCVL— JULY 1892. 



Page 

 Mr. Carl Barus on the Fusion Constants of Igneous Rock. — 



Part I. The Measurement of High Temperature. (Plate I.) 1 

 Prof. W. H. Bragg on the " Elastic Medium " Method of 



treating Electrostatic Theorems 18 



Mr. S. U. Pickering on the Heat of Dissolution of Gases in 



Liquids 35 



Mr. M. Carey Lea on Disruption of the Silver Haloid Molecule 



by Mechanical Force * . . 46 



Dr. L. Natanson on the Probabilities of Molecular Configu- 

 rations 51 



Prof. H. A. Rowland on the Theory of the Transformer . . 54 

 Mr. R. Inwards on an Instrument for Drawing Parabolic 



Curves 57 



Lord Rayleigh on the Question of the Stability of the Flow 



of Fluids 59 



Mr. C. Chree on Rotating Elastic Solid Cylinders of Elliptic 



Section.— Part 1 70 



Dr. W. Pole on some unpublished Data on Colour-Blindness. 



(Plate II.) 100 



Mr. F. J. Smith on an Air-mercury Pump, for raising Mer- 

 cury in different kinds of Mercurial Pumps 115 



Messrs. R. E. Hughes and F. R. L. AVilson on the Action of 



Dried Hydrochloric- Acid Gas on Iceland Spar 117 



Mr. R. H. M. Bosanquet on the Calculation of the Illumi- 

 nating-Power of Hydrocarbons and their Mixtures 120 



Proceedings of the Geological Society : — 



Dr. J. Prestwich on the Raised Beaches, and " Head " 



or Rubble Drift of the South of England.— Part I. . . 130 

 Messrs. B. N. Peach and J. Home on the Olenellus-Zone 



in the North-west Highlands 131 



Dr. J. Prestwich on the Raised Beaches, and" Head " or 



Rubble-Drift of the South of England.— Part II 132 



Mr. C. Reid on the Pleistocene Deposits of the Sussex 



Coast, and their Equivalents in other Districts 133 



Mr. T. V. Holmes on the New Railway from Grays 

 Thurrock to Romford : Sections between Upminster 

 and Romford 



