﻿CONTENTS 
  OF 
  VOL. 
  XVIII. 
  SIXTH 
  SERIES. 
  V 
  

  

  Page 
  

  

  Dr. 
  T. 
  Martiu 
  Lowry 
  on 
  a 
  Method 
  of 
  producing 
  an 
  intense 
  

   Cadmium 
  Spectrum, 
  with 
  a 
  proposal 
  for 
  the 
  use 
  of 
  JMercury 
  

  

  and 
  Cadmium 
  as 
  Standards 
  in 
  Eefractometry 
  320 
  

  

  Prof. 
  H. 
  A. 
  Erikson 
  on 
  the 
  Eecombination 
  of 
  the 
  Ions 
  in 
  Air 
  

  

  at 
  Different 
  Temperatures 
  328 
  

  

  Dr. 
  J. 
  E. 
  Milne 
  on 
  a 
  Device 
  to 
  prevent 
  Backlash 
  in 
  the 
  

   Toothed 
  Wheels 
  and 
  Eack-and-Pinion 
  Grears 
  of 
  Scientific 
  

  

  Instruments 
  336 
  

  

  Notices 
  respecting 
  New 
  Books 
  : 
  — 
  

  

  Mr. 
  T. 
  J. 
  I'A. 
  Bromwich's 
  Introduction 
  to 
  the 
  Theory 
  of 
  

  

  Infinite 
  Series 
  338 
  

  

  Mr. 
  Gr. 
  H. 
  Hardy's 
  Course 
  of 
  Pure 
  Mathematics 
  338 
  

  

  Mr. 
  Clement 
  V. 
  Durell's 
  Plane 
  Greometry 
  for 
  Advanced 
  

  

  Students 
  \ 
  338 
  

  

  Intelhgence 
  and 
  Miscellaneous 
  xlrticles 
  : 
  — 
  • 
  

  

  On 
  the 
  Influence 
  of 
  Gravitv 
  upon 
  a 
  Binary 
  Solution, 
  hy 
  

   the 
  Earl 
  of 
  Berkeley 
  and" 
  Dr. 
  C. 
  Y. 
  Burton 
  340 
  

  

  NUMBEE 
  CV.— 
  SEPTEMBEE. 
  

  

  Mr. 
  William 
  Sutherland 
  on 
  the 
  Ions 
  of 
  Gases 
  3-11 
  

  

  Dr. 
  Herbert 
  Stansfield 
  on 
  the 
  Echelon 
  Spectroscope, 
  its 
  

   Secondarv 
  Action, 
  and 
  the 
  Structure 
  of 
  the 
  Green 
  Mercury 
  

  

  Line. 
  (Plates 
  X.-XII.) 
  371 
  

  

  Prof. 
  J. 
  Joly 
  on 
  the 
  Eadium-Content 
  of 
  Sea 
  Water 
  396 
  

  

  Prof. 
  P. 
  V. 
  Bevan 
  on 
  Anomalous 
  Dispersion 
  bv 
  Metallic 
  

  

  Vapours. 
  (Plate 
  XIII.) 
  ". 
  407 
  

  

  Dr. 
  W. 
  Marshall 
  Watts 
  on 
  the 
  Calculation 
  of 
  the 
  Atomic 
  

  

  Weight 
  of 
  Eadium 
  from 
  Spectroscopic 
  Data 
  411 
  

  

  Lord 
  Eayleigh 
  on 
  the 
  Eesistance 
  due 
  to 
  Obliquely 
  Moving 
  

   Waves 
  and 
  its 
  dependence 
  upon 
  the 
  Particular 
  Form 
  of 
  the 
  

  

  Pore-part 
  of 
  a 
  Ship 
  414 
  

  

  Dr. 
  J. 
  W. 
  Nicholson 
  on 
  Inductance 
  and 
  Eesistance 
  in 
  Tele- 
  

   phone 
  and 
  other 
  Circuits 
  417 
  

  

  Prof. 
  C. 
  H. 
  Lees 
  on 
  Vaschy's 
  or 
  Pirani's 
  Method 
  of 
  com- 
  

   paring 
  the 
  Self-Inductance 
  of 
  a 
  Coil 
  with 
  the 
  Capacity 
  of 
  a 
  

  

  Condenser 
  432 
  

  

  Proceedings 
  of 
  the 
  Geological 
  Society 
  : 
  — 
  

  

  Mr. 
  J. 
  H. 
  Collins 
  on 
  some 
  Geological 
  Features 
  observable 
  

   at 
  the 
  Carpalla 
  China-Clay 
  Pit 
  in 
  the 
  Parish 
  of 
  St. 
  Ste- 
  

   phen's 
  (Cornwall) 
  ". 
  437 
  

  

  Mr. 
  E. 
  A. 
  Martin 
  on 
  the 
  Brighton 
  Cliff-Eorraation 
  437 
  

  

  Mr. 
  A. 
  J. 
  C. 
  Molyneux 
  on 
  the 
  Karoo 
  System 
  in 
  Northern 
  

   Ehodesia. 
  and 
  its 
  relation 
  to 
  the 
  General 
  Geology 
  . 
  . 
  439 
  

  

  