﻿Virtual 
  Anode 
  in 
  the 
  Tabes 
  for 
  Magnetic 
  Rays. 
  855 
  

  

  between 
  my 
  results 
  and 
  those 
  o£ 
  the 
  two 
  physicists 
  quoted 
  

   above. 
  

  

  That 
  in 
  my 
  experiments 
  the 
  gases 
  should 
  always 
  contain 
  

   traces 
  of 
  nitrogen, 
  I 
  deliberately 
  exclude. 
  On 
  the 
  other 
  

   hand, 
  how 
  would 
  one 
  explain 
  the 
  fact 
  of 
  my 
  having 
  obtained 
  

   the 
  phenomena, 
  nay 
  very 
  easy 
  and 
  brilliant 
  phenomena, 
  by 
  

   using 
  nitrogen 
  ? 
  There 
  must 
  be, 
  on 
  the 
  contrary, 
  special 
  

   reasons, 
  owing 
  to 
  which 
  More 
  and 
  Rieman 
  failed 
  in 
  obtaining 
  

   cosnhmt 
  results, 
  and 
  I 
  feel 
  convinced 
  that 
  they 
  will 
  confirm 
  

   my 
  results 
  by 
  imitating 
  more 
  exactly 
  the 
  experimental 
  

   conditions 
  which 
  I 
  have 
  several 
  times 
  carefully 
  described. 
  

  

  The 
  causes 
  which 
  may 
  have 
  contributed 
  to 
  the 
  failure 
  are 
  

   numerous, 
  and 
  here 
  are 
  the 
  principal 
  ones. 
  In 
  the 
  first 
  

   place, 
  I 
  have 
  elsewhere 
  shown 
  that 
  with 
  too 
  great 
  intensity 
  

   of 
  the 
  current 
  in 
  the 
  gas, 
  the 
  limiting 
  values 
  of 
  the 
  intensity 
  

   of 
  the 
  field, 
  within 
  which 
  only 
  the 
  magnetic 
  rays 
  may 
  

   be 
  formed, 
  lie 
  very 
  near 
  each 
  other, 
  and 
  therefore 
  it 
  may 
  

   happen 
  that 
  with 
  certain 
  gases 
  the 
  production 
  of 
  the 
  

   phenomena 
  may 
  not 
  always 
  be 
  easy. 
  In 
  the 
  second 
  place, 
  it 
  

   must 
  be 
  noticed 
  that 
  More 
  and 
  Rieman 
  have 
  employed 
  the 
  

   discharges 
  of 
  an 
  induction-coil 
  and 
  not 
  the 
  current 
  (which 
  is 
  

   remarkably 
  continuous 
  when 
  the 
  magnetic 
  field 
  does 
  not 
  

   exist) 
  supplied 
  by 
  accumulators 
  or 
  by 
  a 
  good 
  influence 
  

   machine. 
  I 
  had, 
  on 
  another 
  occasion, 
  an 
  opportunity 
  of 
  

   remarking 
  how, 
  owing 
  perhaps 
  to 
  the 
  intermittence 
  of 
  the 
  

   current 
  crossing 
  the 
  rarified 
  gas, 
  the 
  phenomena 
  appear 
  

   greatly 
  altered, 
  so 
  much 
  so 
  that 
  after 
  several 
  attempts 
  I 
  had 
  

   to 
  give 
  up 
  the 
  use 
  of 
  the 
  coil. 
  In 
  the 
  third 
  place, 
  the 
  shape 
  

   of 
  the 
  tube 
  of 
  discharge 
  and 
  its 
  scanty 
  length 
  may 
  be 
  causes 
  

   of 
  failure. 
  I 
  have 
  recently 
  noticed 
  that 
  a 
  certain 
  tube 
  having 
  

   the 
  lateral 
  branch 
  so 
  short 
  that 
  the 
  distance 
  between 
  anode 
  

   and 
  cathode 
  was 
  only 
  six 
  centimetres, 
  did 
  not 
  give 
  in 
  any 
  

   satisfactory 
  way 
  the 
  phenomenon 
  of 
  the 
  virtual 
  anode 
  ; 
  but 
  it 
  

   was 
  sufficient 
  to 
  prolong 
  that 
  branch 
  so 
  that 
  the 
  said 
  distance 
  

   was 
  tripled 
  to 
  cause 
  everything 
  to 
  proceed 
  in 
  the 
  most 
  

   satisfactory 
  manner. 
  And 
  I 
  do 
  not 
  mention 
  other 
  causes 
  of 
  

   uncertainty 
  having 
  minor 
  importance. 
  

  

  After 
  what 
  I 
  have 
  stated 
  here 
  a 
  few 
  short 
  comments 
  on 
  

   More 
  and 
  Mauchly's 
  paper 
  will 
  be 
  sufficient 
  ; 
  nay, 
  I 
  shall 
  

   merely 
  point 
  out 
  a 
  few 
  misunderstandings, 
  owing 
  perhaps 
  to 
  

   lack 
  of 
  clearness 
  on 
  my 
  part 
  in 
  the 
  exposition 
  of 
  the 
  matter. 
  

  

  For 
  instance, 
  on 
  page 
  252 
  the 
  authors 
  say 
  that 
  I 
  found 
  

   that 
  the 
  magnetic 
  rays 
  do 
  not 
  carry 
  a 
  charge 
  into 
  a 
  Faraday 
  

   cage. 
  That 
  was 
  stated, 
  on 
  the 
  contrary 
  (more 
  as 
  a 
  probability 
  

   than 
  anything 
  else), 
  not 
  by 
  me 
  but 
  by 
  Yillard, 
  who 
  noticed 
  

  

  