﻿CONTENTS 
  OF 
  VOL. 
  XVI 
  

  

  (SIXTH 
  SEEIES). 
  

  

  NUMBEE 
  XCI.— 
  JULY 
  1908. 
  

  

  Page 
  

  

  Lord 
  Kelvin 
  : 
  The 
  Problem 
  of 
  a 
  Spherical 
  Gaseous 
  Nebula. 
  . 
  1 
  

  

  Prof. 
  A. 
  P. 
  Chattock 
  and 
  Mr. 
  A. 
  M. 
  Tyndall 
  on 
  the 
  Changes 
  

   of 
  Pressure 
  which 
  accompany 
  Point 
  Discharge 
  through 
  

   Hydrogen, 
  containing 
  Oxygen 
  and 
  Nitrogen 
  24 
  

  

  Mr. 
  E. 
  P. 
  Earhart 
  on 
  the 
  Discharge 
  from 
  an 
  Electrified 
  Point 
  

   and 
  the 
  Nature 
  of 
  the 
  Discharge 
  occurring 
  through 
  very 
  

   small 
  Distances. 
  (Plate 
  I.) 
  48 
  

  

  Mr. 
  Gervaise 
  Le 
  Bas 
  on 
  the 
  Unit-Stere 
  Theory 
  : 
  The 
  Demon- 
  

   stration 
  of 
  a 
  Natural 
  Eelation 
  between 
  the 
  Volumes 
  of 
  

   the 
  Atoms 
  in 
  Compounds 
  under 
  Corresponding 
  Conditions 
  

   and 
  that 
  of 
  Combined 
  Hydrogen 
  60 
  

  

  Messrs. 
  A. 
  Holt, 
  Jun., 
  and 
  E. 
  Hopkinson 
  on 
  the 
  Decom- 
  

   of 
  Water 
  Vapour 
  by 
  Electric 
  Sparks 
  92 
  

  

  Mr. 
  E. 
  Hargreaves 
  on 
  the 
  Interaction 
  of 
  Dynamical 
  Systems. 
  110 
  

  

  Mr. 
  S. 
  Kinoshita 
  on 
  the 
  Condensation 
  of 
  the 
  Actinium 
  and 
  

   Thorium 
  Emanations 
  , 
  121 
  

  

  Dr. 
  C. 
  V. 
  Drysdale 
  : 
  Notes 
  on 
  the 
  Plug 
  Permeameter. 
  

   (Plates 
  II. 
  & 
  HI.) 
  132 
  

  

  Dr. 
  C. 
  V. 
  Drysdale 
  on 
  the 
  Use 
  of 
  Shunts 
  and 
  Transformers 
  

   with 
  Alternate 
  Current 
  Measuring 
  Instruments. 
  (Plate 
  IV.) 
  136 
  

  

  Prof. 
  J. 
  Becguerel 
  on 
  the 
  Dispersion 
  of 
  Magnetic 
  Eotatory 
  

   Power 
  in 
  the 
  neighbourhood 
  of 
  Bands 
  of 
  Absorption 
  in 
  

   the 
  case 
  of 
  Eare 
  Earths. 
  Eemarks 
  on 
  the 
  subject 
  of 
  recent 
  

   communications 
  by 
  Prof. 
  E. 
  W. 
  Wood 
  and 
  Mr. 
  G. 
  J. 
  Elias. 
  

   (Plate 
  V.) 
  153 
  

  

  Dr. 
  J. 
  Kunz 
  on 
  Cathode 
  and 
  Canal 
  Eays 
  from 
  Hollow 
  

   Cathodes 
  161 
  

  

  Prof. 
  E. 
  W. 
  Wood 
  on 
  the 
  Emission 
  of 
  Polarized 
  Light 
  by 
  

   Fluorescent 
  Gases 
  184 
  

  

  Prof. 
  J. 
  Joly 
  on 
  the 
  Eadium-Content 
  of 
  Deep-Sea 
  Sediments. 
  190 
  

  

  Notices 
  respecting 
  New 
  Books 
  : 
  — 
  

  

  Dr. 
  E. 
  C. 
  Maclaurin's 
  The 
  Theory 
  of 
  Light 
  198 
  

  

  Text-Books 
  of 
  Physical 
  Chemistry 
  : 
  Julius 
  Thomsen's 
  

   Thermochemistry 
  199 
  

  

  Proceedings 
  of 
  the 
  Geological 
  Society 
  : 
  — 
  

  

  Mr. 
  G. 
  Barrow 
  on 
  the 
  High-Level 
  Platforms 
  of 
  Bodmin 
  

   Moor, 
  and 
  their 
  Eelations 
  to 
  the 
  Deposits 
  of 
  Stream- 
  

   Tin 
  and 
  Wolfram 
  200 
  

  

  