﻿The 
  Genesis 
  of 
  Ions 
  by 
  Collision. 
  281 
  

  

  As 
  usual, 
  the 
  currents 
  produced 
  were 
  measured 
  by 
  means 
  

   of 
  an 
  induction-balance 
  method 
  with 
  a 
  condenser 
  and 
  high- 
  

   resistance 
  junction-potentiometer, 
  the 
  electrometer 
  being 
  used 
  

   only 
  as 
  a 
  detector, 
  or 
  rather 
  to 
  find 
  the 
  proportional 
  part 
  

   between 
  consecutive 
  junctions. 
  

  

  2. 
  After 
  a 
  number 
  of 
  experiments 
  had 
  been 
  made, 
  the 
  gas 
  

   was 
  purified 
  in 
  order 
  to 
  see 
  if 
  the 
  small 
  amount 
  of 
  air 
  that 
  

   got 
  in 
  during 
  an 
  experiment 
  could 
  have 
  affected 
  the 
  results. 
  

   The 
  purification 
  was 
  carefully 
  carried 
  out 
  by 
  passing 
  sparks 
  

   through 
  the 
  gas 
  in 
  the 
  presence 
  of 
  oxygen, 
  over 
  a 
  solution 
  of 
  

   potassium 
  hydroxide, 
  the 
  surplus 
  oxygen 
  being 
  removed 
  by 
  

   means 
  of 
  copper 
  strongly 
  heated 
  in 
  a 
  hard 
  glass 
  tube. 
  

   Practically 
  the 
  same 
  results 
  were 
  obtained 
  after 
  the 
  gas 
  was 
  

   purified 
  and 
  dried. 
  Spectroscopic 
  examination 
  showed 
  the 
  

   characteristic 
  lines 
  of 
  argon 
  with 
  no 
  trace 
  of 
  the 
  nitrogen 
  

   bands. 
  

  

  The 
  results 
  of 
  the 
  experiments 
  are 
  given 
  in 
  the 
  following 
  

   tables. 
  Here 
  q 
  is 
  the 
  observed 
  current 
  for 
  the 
  constant 
  

   force 
  X 
  for 
  different 
  distances 
  d 
  between 
  the 
  plates. 
  The 
  

   values 
  of 
  a 
  and 
  jS 
  were 
  found 
  so 
  that 
  the 
  numbers 
  n 
  calculated 
  

   from 
  the 
  formula 
  (1) 
  should 
  coincide 
  as 
  nearly 
  as 
  possible 
  with 
  

   the 
  currents 
  g. 
  

  

  Table 
  I. 
  — 
  Argon, 
  pressure 
  10 
  mms. 
  

  

  d 
  

  

  ■1. 
  

  

  •2. 
  

  

  •3. 
  

  

  •4 
  

  

  •5. 
  

  

  •6. 
  

  

  •9. 
  

  

  10. 
  

  

  

  X-201 
  q 
  

  

  1-048 
  

  

  1-090 
  

  

  1-149 
  

  

  

  

  

  

  

  

  

  

  a 
  —'47 
  n 
  

  

  1048 
  

  

  1-099 
  

  

  1-151 
  

  

  

  

  X=505 
  q 
  

  

  a 
  =5-88 
  

   j3=-010 
  n 
  

  

  1-71 
  

  

  3-26 
  

  

  5-79 
  

  

  106 
  

  

  18-5 
  

  

  35-5 
  

  

  284 
  

  

  905 
  

  

  1-80 
  

  

  • 
  

  

  326 
  

  

  5-89 
  

  

  10-6 
  

  

  19-5 
  

  

  35-5 
  

  

  286 
  

  

  896 
  

  

  Table 
  II. 
  — 
  Argon, 
  pressure 
  4 
  mms. 
  

  

  d 
  .... 
  

  

  •2. 
  

  

  •3. 
  

  

  •4. 
  

  

  •6. 
  

  

  •8. 
  

  

  •9. 
  

  

  

  X=410 
  q 
  

  

  a 
  =8-29 
  

   j3=-00323 
  n 
  

  

  5-26 
  

  

  

  27-6 
  

  

  150 
  

  

  1070 
  

  

  4420 
  

  

  5-26 
  

  

  

  27-7 
  

  

  152 
  

  

  1080 
  

  

  5110 
  

  

  X=610 
  q 
  

  

  a 
  =1295 
  

   /3=-0300 
  n 
  

  

  13-6 
  

  

  54-2 
  295 
  

  

  

  

  

  13-6 
  

  

  54-2 
  

  

  295 
  

  

  

  

  

  Phil. 
  Mag. 
  S. 
  6. 
  Vol. 
  16. 
  No. 
  92. 
  Aug. 
  1908. 
  

  

  U 
  

  

  