﻿Positive 
  Rays. 
  

  

  663 
  

  

  Hence 
  if 
  V 
  is 
  the 
  potential-difference 
  in 
  volts 
  between 
  the 
  

   plates, 
  and 
  D, 
  as 
  before, 
  the 
  deflexion 
  in 
  the 
  electrostatic 
  

   field, 
  

  

  e 
  D 
  

  

  mv 
  2 
  5'5xl0 
  9 
  V 
  

  

  The 
  magnet 
  had 
  been 
  readjusted 
  and 
  furnished 
  with 
  new 
  

   pole-pieces. 
  If 
  d 
  was 
  the 
  magnetic 
  deflexion, 
  it 
  was 
  found 
  

   that 
  when 
  1 
  ampere 
  was 
  the 
  current 
  through 
  the 
  coils 
  

  

  d 
  

  

  mv 
  

  

  4-5 
  x 
  10 
  4 
  

  

  With 
  this 
  tube 
  the 
  following 
  values 
  of 
  e/m 
  and 
  v 
  were 
  

   obtained 
  for 
  the 
  positive 
  rays 
  proceeding 
  from 
  the 
  cathode 
  

   in 
  the 
  opposite 
  direction 
  to 
  the 
  Canalstrahlen. 
  The 
  value 
  

   of 
  V 
  was 
  400 
  volts. 
  

  

  Tube 
  filled 
  with 
  Air. 
  

  

  D. 
  

  

  d. 
  

  

  e/m. 
  

  

  v. 
  

  

  •4 
  

  

  1-7 
  

  

  •83X104 
  

  

  2-2xl0 
  8 
  cm./sec. 
  

  

  •3 
  

  

  1-6 
  

  

  •9X104 
  

  

  2-6 
  XlO 
  8 
  „ 
  

  

  •5 
  

  

  1-9 
  

  

  •72X10^ 
  

  

  1-7X10 
  8 
  „ 
  

  

  ■5 
  

  

  2-0 
  

  

  •9x104 
  

  

  2-OxlO 
  8 
  „ 
  

  

  ■4 
  

  

  1-8 
  

  

  •9x104 
  

  

  2-2x108 
  „ 
  

  

  •2 
  

  

  1-3 
  

  

  •9x104 
  

  

  3-2x108 
  „ 
  

  

  •4 
  

  

  1-7 
  

  

  •83X10- 
  1 
  

  

  2-2x108 
  „ 
  

  

  

  Mean 
  .... 
  

  

  .. 
  -85x104 
  

  

  

  

  Tube 
  fil 
  

  

  led 
  with 
  H 
  

  

  elium. 
  

  

  •5 
  

  

  20 
  

  

  •9X10- 
  1 
  

  

  2-0xl08 
  C 
  m./sec. 
  

  

  •5 
  

  

  22 
  

  

  108 
  xlO 
  4 
  

  

  2-2x108 
  „ 
  

  

  •5 
  

  

  21 
  

  

  1x104 
  

  

  •2-i 
  xio 
  8 
  » 
  

  

  

  Mean 
  .... 
  

  

  .. 
  -99x104 
  

  

  

  The 
  deflexions 
  of 
  the 
  Canalstrahlen 
  in 
  the 
  same 
  tube 
  were 
  

   also 
  observed: 
  this 
  could 
  easily 
  be 
  done 
  by 
  majdng 
  the 
  tube 
  A 
  

  

  