﻿298 
  Mr. 
  McClung 
  on 
  the 
  Rate 
  of 
  Recombination 
  of 
  

  

  Table 
  II. 
  

  

  1 
  

  

  I 
  

  

  Pressure. 
  

  

  Deflexion 
  

   forN. 
  

  

  Deflexion 
  

   for 
  Q. 
  

  

  a 
  2 
  

  

  1 
  atmos. 
  

   3 
  „ 
  

  

  1210 
  

   193-0 
  

  

  344 
  

   797 
  

  

  1-094 
  

  

  1 
  

  

  2o 
  , 
  

  

  

  67-9 
  

   1032 
  

  

  704 
  

   91V0 
  

  

  16-6 
  

   355 
  

  

  1-083 
  

  

  1 
  

  

  

  15-2 
  

   26-5 
  

  

  1-058 
  

  

  1 
  

  

  1-5 
  , 
  

  

  

  128-6 
  

   148-7 
  

  

  38-2 
  

   49-4 
  

  

  1-028 
  

  

  1 
  

  

  

  110 
  

  

  93-5 
  

  

  29-3 
  

   20 
  7 
  

  

  1-018 
  

  

  1 
  

   •25 
  , 
  

  

  

  70-0 
  

   43-5 
  

  

  23-5 
  

   9-0 
  

  

  1-011 
  

  

  1 
  

   •125, 
  

  

  1 
  

  

  

  ()l-9 
  

   29-9 
  

  

  22-7 
  

   5-1 
  

  

  1-029 
  

  

  The 
  set 
  of 
  comparisons 
  above 
  were 
  not 
  all 
  made 
  at 
  the 
  same 
  

   time, 
  but 
  several 
  of 
  the 
  observations 
  were 
  made 
  on 
  different 
  

   days, 
  extending 
  over 
  a 
  period 
  of 
  about 
  two 
  weeks, 
  and 
  the 
  

   comparison 
  in 
  each 
  case 
  was 
  made 
  with 
  air 
  at 
  atmospheric 
  

   pressure, 
  so 
  they 
  do 
  not 
  represent 
  a 
  single 
  set 
  of 
  values. 
  

  

  We 
  have 
  thus 
  arrived 
  at 
  the 
  fact 
  that 
  not 
  only 
  does 
  the 
  

   same 
  law 
  of 
  recombination 
  of 
  the 
  ions 
  in 
  air 
  hold 
  at 
  various 
  

   pressures, 
  but 
  the 
  value 
  of 
  the 
  coefficient 
  of 
  recombination 
  is 
  

   independent 
  of 
  the 
  pressure 
  of 
  the 
  air 
  in 
  which 
  the 
  ionization 
  

   takes 
  place. 
  If 
  the 
  value 
  of 
  a 
  is 
  therefore 
  determined 
  for 
  

   air 
  at 
  atmospheric 
  pressure, 
  it 
  is 
  determined 
  for 
  air 
  at 
  other 
  

   pressures 
  as 
  well. 
  

  

  Determination 
  of 
  the 
  Absolute 
  Value 
  of 
  a. 
  

  

  We 
  now 
  proceed 
  to 
  determine 
  the 
  absolute 
  value 
  for 
  this 
  

   coefficient 
  of 
  recombination. 
  Since 
  the 
  value 
  of 
  a 
  is 
  the 
  same 
  

   for 
  different 
  pressures, 
  it 
  is 
  only 
  necessary 
  to 
  determine 
  it 
  for 
  

   pressure, 
  so 
  atmospheric 
  pressure 
  has 
  been 
  

  

  a 
  single 
  given 
  

  

  