﻿336 
  

  

  Trowbridge 
  and 
  Richards 
  —Temperature 
  and 
  

  

  IV. 
  The 
  form 
  of 
  the 
  tube 
  has 
  an 
  important 
  effect 
  upon 
  the 
  

   resistance 
  of 
  the 
  gas. 
  

  

  V. 
  With 
  the 
  oscillatory 
  discharge 
  it 
  is 
  evident 
  that 
  the 
  

   electrodes 
  produce 
  far 
  less 
  effect 
  than 
  with 
  the 
  continuous 
  

   discharge. 
  

  

  Pig. 
  4. 
  Ohms 
  are 
  plotted 
  horizontally. 
  

  

  Millimeters 
  of 
  pressure 
  are 
  plotted 
  vertically. 
  

  

  These 
  conclusions 
  are 
  not 
  wholly 
  without 
  support 
  in 
  the 
  

   literature 
  of 
  the 
  subject. 
  J. 
  J. 
  Thomson's 
  researches 
  with 
  

   tubes 
  without 
  electrodes* 
  show 
  that 
  a 
  rarified 
  gas 
  must 
  have 
  

  

  * 
  Recent 
  researches 
  in 
  electricity 
  and 
  magnetism, 
  p. 
  92. 
  This 
  book 
  contains 
  

   an 
  admirable 
  resume 
  of 
  the 
  whole 
  subject. 
  

  

  