﻿Positive 
  Ji 
  

  

  lyi 
  

  

  0G9 
  

  

  much 
  retarded 
  as 
  it 
  had 
  been 
  accelerated 
  before 
  reaching 
  the 
  

   gauze, 
  and 
  any 
  velocity 
  it 
  possessed 
  after 
  passing 
  through 
  the 
  

   perforated 
  electrode 
  must 
  have 
  been 
  acquired 
  from 
  sources 
  

   independent 
  of 
  the 
  electric 
  field 
  ; 
  while 
  in 
  the 
  first 
  case 
  its 
  

   velocity 
  would 
  be 
  measured 
  by 
  the 
  electric 
  field 
  in 
  the 
  tube. 
  

   On 
  trying 
  the 
  experiment, 
  it 
  was 
  found 
  that 
  though 
  the 
  Canal- 
  

   strahlen 
  were 
  not 
  nearly 
  as 
  bright 
  in 
  the 
  second 
  case 
  as 
  in 
  

   the 
  first, 
  they 
  were 
  still 
  quite 
  perceptible, 
  and 
  that 
  the 
  velocity 
  

   of 
  those 
  which 
  got 
  through 
  was 
  the 
  same 
  as 
  the 
  velocity 
  of 
  

   those 
  reaching 
  the 
  screen 
  in 
  the 
  first 
  case. 
  The 
  fact 
  that 
  

   a 
  large 
  proportion 
  of 
  the 
  rays 
  are 
  stopped 
  by 
  connecting 
  

   the 
  perforated 
  electrode 
  with 
  the 
  anode, 
  while 
  those 
  which 
  

   get 
  through 
  are 
  not 
  affected, 
  shows 
  that 
  the 
  velocity 
  of 
  the 
  

   majority 
  of 
  them 
  is 
  not 
  great 
  enough 
  to 
  travel 
  against 
  the 
  

   potential-difference 
  between 
  the 
  electrodes 
  ; 
  while 
  the 
  fact 
  

   that 
  some 
  get 
  through 
  without 
  diminution 
  of 
  velocity, 
  indicates 
  

   that 
  when 
  they 
  are 
  passing 
  between 
  the 
  gauze 
  and 
  the 
  

   perforated 
  electrode, 
  they 
  are 
  for 
  the 
  moment 
  electrically 
  

   neutral 
  and 
  without 
  charge, 
  and 
  that 
  they 
  re-acquire, 
  by 
  

   losing 
  a 
  corpuscle, 
  a 
  positive 
  charge 
  after 
  passing 
  through 
  

   the 
  opening 
  in 
  the 
  electrode 
  by 
  collision 
  with 
  the 
  molecules 
  

   of 
  the 
  gas. 
  The 
  following 
  experiment 
  shows 
  in 
  perhaps 
  a 
  

   simpler 
  way 
  than 
  the 
  preceding 
  one 
  that 
  some 
  of 
  the 
  Canal- 
  

   strahlen 
  are 
  uncharged 
  during 
  a 
  portion 
  of 
  their 
  path. 
  The 
  

   perforated 
  cathode 
  (fig. 
  5) 
  was 
  wedge-shaped, 
  the 
  angle 
  

  

  Tier. 
  5. 
  

  

  fcd 
  B 
  

  

  of 
  the 
  wedge 
  being 
  about 
  27°, 
  the 
  diameter 
  of 
  the 
  cathode 
  

   was 
  2 
  cm., 
  the 
  aperture 
  through 
  which 
  the 
  Canalstrahlen 
  

   passed 
  was 
  abont 
  5 
  mm. 
  from 
  the 
  sharp 
  end, 
  the 
  length 
  of 
  

   the 
  path 
  of 
  the 
  rays 
  from 
  one 
  side 
  of 
  the 
  cathode 
  to 
  another 
  

  

  