﻿Rotation 
  of 
  Electric 
  Discharge. 
  

  

  543 
  

  

  higher 
  pressure 
  when 
  the 
  distance 
  between 
  the 
  electrodes 
  is 
  

   less 
  and 
  is, 
  moreover, 
  less 
  marked. 
  In 
  fact 
  when 
  the 
  distance 
  

  

  Fig. 
  10. 
  

  

  180 
  

  

  160 
  

  

  120 
  

  

  100 
  

  

  so 
  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  f 
  

  

  

  

  

  / 
  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  x 
  

  

  / 
  

  

  

  

  

  

  

  

  20 
  

  

  10 
  20 
  30 
  40 
  SO 
  60 
  70 
  80 
  

  

  £}/rrefi£NC£ 
  of 
  potemt/al 
  between 
  the 
  electrodes 
  //v 
  ei£~ct/?os7at/c 
  o/y/ts 
  

  

  T 
  Dl3T 
  BET. 
  ELECTRODES 
  58 
  CM 
  

  

  Z 
  . 
  : 
  18 
  CM. 
  

  

  is 
  small 
  (2*5 
  or 
  3 
  cm.) 
  there 
  is 
  no 
  such 
  bend, 
  the 
  first 
  stage 
  

   in 
  which 
  the 
  discharge 
  is 
  showery 
  being 
  absent 
  (§ 
  18). 
  

  

  29. 
  In 
  order 
  to 
  determine 
  the 
  effect 
  of 
  the 
  distance 
  

   between 
  the 
  electrodes 
  on 
  rotation, 
  the 
  apparatus 
  (fig. 
  11, 
  

   p. 
  544) 
  was 
  used. 
  

  

  The 
  ring 
  electrode 
  is 
  joined 
  to 
  a 
  stiff 
  copper 
  wire 
  (A), 
  

   passing 
  through 
  and 
  moving 
  with 
  a 
  glass 
  float 
  B, 
  which 
  slides 
  

   in 
  the 
  tube 
  C. 
  Mercury 
  fills 
  a 
  portion 
  of 
  C, 
  the 
  flask 
  D 
  and 
  

   the 
  indiarubber 
  tube 
  E. 
  The 
  ring 
  ican 
  be 
  raised 
  or 
  lowered 
  

   by 
  the 
  adjustment 
  of 
  the 
  level 
  of 
  mercury 
  in 
  C. 
  

  

  30. 
  In 
  this 
  way 
  experiments 
  were 
  made 
  at 
  different 
  pres- 
  

   sures 
  and 
  different 
  distances 
  between 
  the 
  electrodes. 
  The 
  

  

  