﻿on 
  Columnar 
  Ionization. 
  

  

  Table 
  II. 
  

  

  d=2'6 
  cm. 
  ; 
  r 
  = 
  i 
  m 
  /i 
  261 
  . 
  

  

  517 
  

  

  

  Longitudinal 
  Field. 
  

  

  Transverse 
  Field. 
  

  

  p- 
  

  

  X. 
  

  

  V 
  

  

  r 
  v 
  

  

  X. 
  

  

  V 
  

  

  V 
  

  

  261 
  

  

  1580 
  

  

  0-385 
  

  

  

  630 
  

  

  0-435 
  

  

  

  400 
  

  

  1580 
  

  

  0-610 
  

  

  

  530 
  

  

  0-685 
  

  

  

  760 
  

  

  105 
  

  

  1-18 
  

  

  2-94 
  

  

  42 
  

  

  1-48 
  

  

  3-40 
  

  

  760 
  

  

  420 
  

  

  1-26 
  

  

  3-28 
  

  

  210 
  

  

  1-54 
  

  

  3-54 
  

  

  760 
  

  

  1050 
  

  

  1-32 
  

  

  3-43 
  

  

  420 
  

  

  1-58 
  

  

  3-52 
  

  

  760 
  

  

  1580 
  

  

  1-34 
  

  

  3-48 
  

  

  630 
  

  

  1-53 
  

  

  3-52 
  

  

  Fig. 
  3. 
  

  

  

  D 
  B 
  

  

  o 
  

  

  -o 
  

  

  

  

  

  

  f 
  

  

  A 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  A 
  = 
  L0NGI 
  

   B 
  = 
  TRAM 
  

  

  rUDINAL 
  

   5VER5E 
  

  

  FIELD 
  

  

  

  

  

  

  

  

  

  

  

  

  

  600 
  

  

  1000 
  

  

  1200 
  1400 
  1600 
  

  

  I/o/ts/yer 
  cm. 
  

  

  field 
  was 
  1580 
  volts 
  per 
  centimetre 
  for 
  botb 
  the 
  longitu- 
  

   dinal 
  and 
  the 
  transverse 
  fields. 
  The 
  results 
  are 
  shown 
  in 
  

   Table 
  III. 
  

  

  Table 
  III. 
  

   Xj 
  = 
  1580 
  volts/cm. 
  ; 
  X*=630 
  volts/cm. 
  ; 
  r 
  = 
  i 
  760 
  /i 
  2 
  8±. 
  ' 
  

  

  d. 
  

  

  r 
  l- 
  

  

  r 
  . 
  

  

  d. 
  

  

  n- 
  

  

  r 
  t- 
  

  

  3-2 
  cm. 
  

   3-0 
  cm. 
  

  

  304 
  

   3-30 
  

  

  3-08 
  

   3-37 
  

  

  2-8 
  cm. 
  

   2-6 
  cm. 
  

  

  3-27 
  

   3-11 
  

  

  3-34 
  

   3-28 
  

  

  It 
  will 
  be 
  seen 
  now 
  that 
  in 
  every 
  case 
  the 
  value 
  of 
  r 
  t 
  is 
  

   greater 
  than 
  the 
  corresponding 
  value 
  of 
  ri. 
  The 
  curves 
  of 
  

   fig. 
  3 
  tend 
  to 
  the 
  same 
  maximum 
  value, 
  namely, 
  3'53. 
  

  

  