﻿Virtual 
  Anode 
  in 
  the 
  Tubes 
  for 
  Magnetic 
  Rays. 
  849 
  

  

  the 
  latter 
  physicists 
  had 
  repeated, 
  and 
  which 
  had 
  given 
  them 
  

   results 
  different 
  from 
  mine, 
  when 
  they 
  employed 
  gases 
  

   different 
  from 
  air. 
  Only 
  recently 
  I 
  have 
  had 
  leisure 
  to 
  

   satisfy 
  such 
  desire 
  by 
  a 
  series 
  of 
  numerous 
  experiments 
  

   which 
  I 
  shall 
  fully 
  describe 
  and 
  discuss 
  before 
  long 
  in 
  a 
  

   special 
  publication. 
  In 
  the 
  present 
  Note 
  I 
  intend, 
  in 
  the 
  

   meantime, 
  to 
  make 
  known 
  the 
  results 
  w 
  T 
  hich 
  I 
  have 
  obtained, 
  

   after 
  which 
  I 
  shall 
  occupy 
  myself 
  w 
  T 
  ith 
  a 
  new 
  paper 
  due 
  to 
  

   Messrs. 
  More 
  and 
  Mauchly 
  *, 
  concerning 
  which 
  I 
  find 
  a 
  few 
  

   remarks 
  sufficient 
  for 
  the 
  present. 
  

  

  The 
  experiment 
  in 
  question 
  has 
  so 
  often 
  been 
  described, 
  

   and 
  as 
  lately 
  as 
  in 
  More 
  and 
  Rieman's 
  paper 
  , 
  that 
  I 
  may 
  

   consider 
  it 
  as 
  well 
  known 
  to 
  the 
  reader. 
  The 
  experiment 
  

   show 
  r 
  s 
  that, 
  when 
  through 
  the 
  action 
  of 
  the 
  magnetic 
  field 
  

   there 
  appears, 
  with 
  unusual 
  extension, 
  a 
  beam 
  of 
  cathodic 
  

   rays 
  presenting 
  certain 
  features, 
  which 
  had 
  induced 
  physicists 
  

   to 
  give 
  them 
  a 
  special 
  denomination 
  (cathodic 
  rays 
  of 
  the 
  

   second 
  kind, 
  or 
  magnetocathodic 
  rays, 
  or 
  magnetic 
  rays), 
  

   and 
  that 
  on 
  the 
  prolongation 
  of 
  them 
  another 
  one 
  may 
  

   appear 
  having 
  the 
  colour 
  and 
  characters 
  of 
  the 
  positive 
  

   column 
  of 
  the 
  usual 
  discharge. 
  

  

  To 
  this 
  column, 
  which 
  constitutes 
  a 
  secondary 
  phenomenon 
  

   due 
  to 
  the 
  magnetic 
  rays, 
  More 
  and 
  Rieman 
  give 
  the 
  name 
  

   of 
  " 
  induced 
  column." 
  Formerly 
  I 
  did 
  not 
  think 
  it 
  necessary 
  

   to 
  give 
  it 
  a 
  special 
  name 
  ; 
  in 
  order 
  to 
  avoid 
  misunder- 
  

   standings, 
  however, 
  I 
  have 
  also 
  called 
  it 
  thus 
  in 
  the 
  Note 
  

   above 
  quoted. 
  But, 
  as 
  there 
  is 
  in 
  this 
  case 
  no 
  real 
  pheno- 
  

   menon 
  of 
  induction, 
  I 
  shall 
  henceforward 
  indicate 
  it 
  by 
  the 
  

   name 
  of 
  " 
  secondary 
  column. 
  5 
  ' 
  

  

  The 
  phenomenon 
  is 
  produced 
  particularly 
  well 
  with 
  the 
  

   tubes 
  I 
  have 
  especially 
  made, 
  which 
  have 
  the 
  cathode 
  at 
  one 
  

   of 
  the 
  ends 
  next 
  to 
  the 
  pole 
  of 
  the 
  coil 
  producing 
  the 
  

   magnetic 
  field, 
  and 
  arranged 
  so 
  as 
  to 
  have 
  its 
  axis 
  on 
  the 
  

   prolongation 
  of 
  the 
  axis 
  of 
  the 
  coil, 
  while 
  the 
  anode 
  is 
  placed 
  

   in 
  a 
  side 
  branch. 
  

  

  The 
  reader 
  may 
  see 
  the 
  shape 
  of 
  the 
  tubes 
  in 
  my 
  

   publications 
  as 
  well 
  as 
  in 
  More 
  and 
  Rieman's 
  Note 
  

   (fig. 
  l,p. 
  308 
  )t. 
  

  

  The 
  principal 
  experiment 
  is 
  carried 
  out 
  by 
  observing 
  the 
  

   action 
  produced 
  on 
  the 
  secondary 
  column 
  by 
  a 
  feeble 
  

   transversal 
  magnetic 
  field 
  obtained, 
  for 
  example, 
  by 
  means 
  

  

  * 
  Phil. 
  Mag-., 
  August 
  1913, 
  p. 
  252. 
  

  

  t 
  [The 
  figure 
  referred 
  to 
  is 
  reproduced 
  on 
  page 
  850 
  for 
  the 
  con- 
  

   venience 
  of 
  the 
  reader. 
  — 
  Eds. 
  Phil. 
  Mag.] 
  

  

  Phil. 
  Mag. 
  S. 
  6. 
  Vol. 
  26. 
  No. 
  155. 
  Nov. 
  1913. 
  3 
  M 
  

  

  