IV CONTENTS OF VOL. XXXII. SIXTH SERIES. 



DUMBER CLXXXVIIL— AUGUST. 



Page 

 Lord Rayleigh on the Discharge of Gases under High 



Pressures 177 



Lord Rayleigh on the Energy acquired by Small Resonators 



from incident "Waves of like Period 188 



Prof. A. Anderson on the Mutual Magnetic Energv of two 



Moving Point Charges ". 190 



Mr. G. li. Livens on the Principle of Least Action in the 



Theory of Electrodynamics 195 



Mr. G. H. Livens on the Hall Effect and Allied Phenomena. 200 

 Mr. M. Ishino on the Velocity of Secondary Cathode Rays 



emitted bv a Gas under the Action of High-Speed Cathode 



Rays . . .' 202 



Dr. "W . Makower on the Straggling of a. Particles 222 



Dr. W. Makower on the Efficiency of Recoil of Radium D 



from Radium C 226 



Dr. G. Green on a Method of Deriving PJanck's Law of 



Radiation 229 



Prof. G. N. Watson on Bessel Eunctions of Equal Order and 



Argument t 232 



Dr. J. R. Airey on Bessel Eunctions of Equal Order and 



Argument 237 



Drs. S. Brodetsky and B. Hodgson on the Absorption of 



Gases in Vacuum-Tubes 239 



Dr. L. Vegard on the Electric Absorption of Gases in Vacuum- 



Tubes 239 



Prof. "W. M. Thornton on the Cause of Lowered Dielectric 



Strength in High-Frequency Eields 242 



Prof. H. F. Dawes on Image Formation by Crystalline Media. 248 

 Notices respecting New Books : — 



Dr. E. H. Barton's An Introduction to the Mechanics of 



Fluids 261 



R. P. Richardson and E. H. Landis's Fundamental 

 Conceptions of Modern Mathematics ; and Numbers, 

 Variables, and Mr. Russell's Philosophy 262 



NUMBER CLXXXIX.— SEPTEMBER. 



Dr. L. Silberstein on Fluorescent Vapours and their Magneto- 

 optic Properties 265 



Mr. E. H. Nichols on the Diurnal Variation of Atmospheric 

 Electrical Quantities 282 



Mr. F. Tinker on the Vapour Pressures of Binary Liquid 

 Mixtures : Kinetic Theory based on Dieterici's Equation . . 295 



Mr. A. K. Chapman on the Hall and Corbino Eifects 3u3 



