﻿Recombination 
  of 
  Ions 
  made 
  by 
  a 
  Rays. 
  

  

  997 
  

  

  depends 
  on 
  the 
  nature 
  of 
  the 
  gas, 
  and 
  hence 
  the 
  saturation 
  

   curves 
  of 
  two 
  gases, 
  characterized 
  by 
  different 
  values 
  of 
  c 
  2 
  , 
  

   ought 
  to 
  be 
  reduced 
  to 
  the 
  same 
  form 
  by 
  orthogonal 
  strain 
  

   parallel 
  to 
  the 
  axis 
  of 
  V, 
  that 
  is 
  by 
  altering 
  the 
  abscissae 
  in 
  

   a 
  given 
  ratio 
  while 
  the 
  ordinates 
  are 
  left 
  unchanged. 
  An 
  

   attempt 
  has 
  been 
  made 
  to 
  reduce 
  all 
  the 
  curves 
  of 
  fig. 
  2 
  to 
  

   the 
  same 
  form 
  by 
  such 
  straining, 
  but 
  coincidence 
  of 
  the 
  

   curves 
  representing 
  different 
  gases 
  caunot 
  be 
  obtained 
  by 
  

   such 
  means. 
  Some 
  experiments 
  were 
  made 
  with 
  C0 
  2 
  at 
  

   different 
  pressures, 
  but 
  it 
  was 
  found 
  that 
  even 
  when 
  the 
  same 
  

   gas 
  was 
  used 
  at 
  different 
  pressures, 
  the 
  saturation 
  curves 
  

   could 
  not 
  be 
  brought 
  into 
  coincidence 
  by 
  straining. 
  The 
  

   ratio 
  

  

  ©, 
  

  

  = 
  constant 
  

  

  was 
  not 
  found 
  to 
  be 
  approximately 
  constant, 
  as 
  is 
  evident 
  

   from 
  inspection 
  of 
  fig. 
  3. 
  This 
  test 
  was 
  also 
  applied 
  to 
  

  

  Fisr. 
  3. 
  

  

  curves 
  for 
  hydrogen 
  at 
  different 
  pressures, 
  and 
  in 
  this 
  case 
  

   the 
  values 
  

  

  ©, 
  

  

  2'.— 
  = 
  constant 
  

   »o 
  

  

  were 
  found 
  to 
  be 
  approximately 
  constant, 
  as 
  is 
  shown 
  by 
  the 
  

   examples 
  on 
  fig. 
  4. 
  

  

  But 
  the 
  most 
  convincing 
  evidence 
  of 
  the 
  inapplicability 
  ot 
  

   a 
  simple 
  hypothesis 
  of 
  columnar 
  ionization 
  is 
  afforded 
  by 
  

  

  