﻿IV 
  CONTENTS 
  OE 
  VOL. 
  XXVI. 
  SIXTH 
  SEMES. 
  

  

  Page 
  

  

  Dr. 
  G. 
  N. 
  An 
  ton 
  off 
  on 
  the 
  Existence 
  of 
  Uranium 
  Y 
  332 
  

  

  Prof. 
  W. 
  G. 
  Duffield 
  on 
  the 
  Deposit 
  upon 
  the 
  Poles 
  of 
  Metallic 
  

  

  Arcs. 
  (Plates 
  IX. 
  & 
  X.) 
  * 
  333 
  

  

  Prof. 
  O. 
  W. 
  Richardson 
  on 
  the 
  Emission 
  of 
  Electrons 
  from 
  

   Tungsten 
  at 
  High 
  Temperatures: 
  an 
  Experimental 
  Proof 
  

   that 
  the 
  Electric 
  Current 
  in 
  Metals 
  is 
  carried 
  by 
  Electrons. 
  345 
  

   Prof. 
  A. 
  Anderson 
  on 
  Electric 
  Currents 
  through 
  Air 
  Eilius. 
  . 
  351 
  

   Messrs. 
  E. 
  Marsden 
  aud 
  E. 
  H. 
  Wilson 
  : 
  Some 
  Experiments 
  

  

  with 
  the 
  Active 
  Deposit 
  of 
  Thorium 
  354 
  

  

  Mr. 
  G. 
  H. 
  Livens 
  on 
  Magneto-Optical 
  Eotativity 
  362 
  

  

  Messrs. 
  ¥. 
  S. 
  Bryson 
  and 
  J. 
  Logie 
  on 
  the 
  Constitution 
  of 
  the 
  

  

  Mercury 
  Green 
  Line 
  (A=5461 
  A.U.) 
  366 
  

  

  Dr. 
  K. 
  Bergwitz: 
  Remarks 
  on 
  the 
  Note 
  of 
  Mr. 
  W. 
  A. 
  D. 
  

   Rudge, 
  " 
  On 
  the 
  Electrification 
  of 
  the 
  Atmosphere 
  and 
  

  

  Surface 
  of 
  the 
  Earth 
  '' 
  375 
  

  

  Proceedings 
  of 
  the 
  Geological 
  Society 
  ; 
  — 
  

  

  Mr. 
  M. 
  Odling 
  on 
  the 
  Bathonian 
  Rocks 
  of 
  the 
  Oxford 
  

  

  District 
  376 
  

  

  Mr. 
  J. 
  A. 
  Thomson 
  on 
  the 
  Petrology 
  of 
  the 
  Ivalgoorlie 
  

  

  Goldlield 
  (Western 
  Australia), 
  . 
  ," 
  377 
  

  

  Mr. 
  P. 
  G.H. 
  Boswell 
  on 
  the 
  Age 
  of 
  the 
  Suffolk 
  Valleys; 
  

   with 
  Notes 
  on 
  the 
  Binned 
  Channels 
  of 
  Drift 
  ........ 
  379 
  

  

  Mr. 
  A, 
  Jowett 
  on 
  the 
  Volcanic 
  Rocks 
  in 
  the 
  Eorfarshire 
  

   Coast 
  and 
  their 
  Associated 
  Sediments 
  380 
  

  

  NUMBER 
  CLIJI.— 
  SEPTEMBER. 
  

  

  Mr. 
  H, 
  P. 
  Waknsley 
  on 
  the 
  Distribution 
  of 
  the 
  Active 
  Deposit 
  

   of 
  Actinium 
  in 
  Electric 
  Eields 
  381 
  

  

  Dr. 
  T. 
  S. 
  Taylor 
  on 
  the 
  Range 
  and 
  Ionization 
  of 
  the 
  Alpha 
  

   Particle 
  in 
  Simple 
  Gases 
  402 
  

  

  Dr. 
  B. 
  Hodgson 
  and 
  Mr. 
  P. 
  A, 
  Mainstone 
  on 
  Heating 
  Effects 
  

   at 
  the 
  Cathode 
  in 
  Vacuum 
  Tubes 
  4] 
  1 
  

  

  Mr. 
  P. 
  G. 
  Nutting 
  on 
  the 
  Absorption 
  of 
  Light 
  in 
  Hetero- 
  

   geneous 
  Media 
  . 
  . 
  , 
  423 
  

  

  Mr. 
  J. 
  Hollingworth 
  on 
  a 
  Physical 
  Interpretation 
  of 
  the 
  Bessel 
  

   Function 
  of 
  Zero 
  Order 
  . 
  427 
  

  

  Mr. 
  J. 
  R. 
  Wilton 
  on 
  Plane 
  Waves 
  of 
  Sound 
  440 
  

  

  Prof. 
  0. 
  W. 
  Richardson 
  on 
  the 
  Ions 
  from 
  Hot 
  Salts 
  ...... 
  452 
  

  

  Profs. 
  H. 
  L. 
  Cooke 
  and 
  0. 
  W. 
  Richardson 
  on 
  the 
  Absorption 
  

   of 
  Heat 
  produced 
  by 
  the 
  Emission 
  of 
  Ions 
  from 
  Hot 
  

   Bodies 
  : 
  II 
  472 
  

  

  Dr. 
  N. 
  Bohr 
  on 
  the 
  Constitution 
  of 
  Atoms 
  and 
  Molecules 
  . 
  . 
  476 
  

  

  Mr. 
  R. 
  V. 
  Southwell 
  on 
  the 
  Collapse 
  of 
  Tubes 
  by 
  External 
  

   Pressure 
  : 
  II 
  502 
  

  

  Prof. 
  E. 
  M. 
  Wellisch 
  and 
  Dr. 
  J. 
  W. 
  Woodrow 
  : 
  Experiments 
  

   on 
  Columnar 
  Ionization 
  511 
  

  

  