﻿850 
  Prof. 
  A. 
  Riglii 
  : 
  New 
  Experiments 
  on 
  the 
  

  

  of 
  a 
  coil. 
  In 
  the 
  figure 
  quoted 
  BE 
  is 
  the 
  beam 
  of 
  magnetic 
  

   rays, 
  EF 
  the 
  secondary 
  column, 
  and 
  S 
  the 
  exploring 
  coil. 
  

   The 
  effect 
  which 
  may 
  be 
  observed 
  is 
  a 
  deformation 
  of 
  the 
  

   secondary 
  column, 
  such 
  as 
  might 
  be 
  

  

  produced 
  if, 
  in 
  a 
  given 
  

  

  F 
  -■,'"-'* 
  

  

  e 
  tf^% 
  ; 
  

  

  ri 
  

  

  region 
  of 
  the 
  same, 
  an 
  anode 
  (virtual 
  anode) 
  existed 
  and 
  two 
  

   cathodes 
  were 
  at 
  the 
  ends 
  of 
  the 
  tube. 
  According 
  to 
  the 
  

   hypothesis 
  on 
  the 
  nature 
  of 
  magnetic 
  rays 
  which 
  has 
  always 
  

   guided 
  me 
  in 
  my 
  researches 
  on 
  the 
  subject, 
  these 
  rays 
  are 
  

   not 
  merely 
  cathodic 
  rays 
  of 
  a 
  shape 
  rendered 
  helicoidal 
  by 
  

   the 
  magnetic 
  field, 
  but 
  they 
  contain 
  besides 
  neutral 
  pairs 
  

   constituted 
  by 
  a 
  positive 
  ion 
  around 
  which 
  revolves 
  an 
  

   electron 
  as 
  a 
  satellite. 
  Very 
  likely 
  such 
  pairs 
  can 
  be 
  formed 
  

   in 
  every 
  case 
  within 
  an 
  ionized 
  gas 
  ; 
  however, 
  they 
  escape 
  

   notice 
  because 
  they 
  are 
  orientated 
  without 
  any 
  fixed 
  rule 
  and 
  

   are 
  extremely 
  unstable. 
  But 
  in 
  the 
  presence 
  of 
  a 
  magnetic 
  

   field 
  such 
  pairs, 
  in 
  which 
  the 
  electron 
  revolves 
  in 
  a 
  certain 
  

   direction, 
  are 
  rendered 
  less 
  unstable, 
  and, 
  at 
  the 
  same 
  time, 
  

   the 
  force 
  acting 
  on 
  the 
  closed 
  current, 
  represented 
  by 
  the 
  

   orbit 
  of 
  the 
  electron, 
  drives 
  them 
  in 
  the 
  direction 
  in 
  which 
  

   the 
  intensity 
  of 
  the 
  field 
  diminishes. 
  

  

  From 
  that 
  might, 
  in 
  part, 
  ensue 
  the 
  lengthening 
  of 
  the 
  

   beam 
  of 
  magnetic 
  rays 
  which 
  is 
  noticed 
  when 
  the 
  intensity 
  

   of 
  the 
  magnetic 
  field 
  is 
  caused 
  to 
  increase 
  to 
  a 
  certain 
  extent. 
  

  

  This 
  being 
  established, 
  here 
  is 
  what 
  may 
  be 
  the 
  explanation 
  

   of 
  the 
  virtual 
  anode. 
  The 
  pairs 
  ion-electron 
  are 
  incessantly 
  

   destroyed 
  through 
  molecular 
  collisions 
  ; 
  but 
  new 
  ones 
  are 
  

   formed, 
  in 
  a 
  quantity 
  which, 
  of 
  course, 
  decreases 
  as 
  we 
  go 
  

   towards 
  the 
  places 
  where 
  the 
  intensity 
  of 
  the 
  field 
  becomes 
  

   less. 
  

  

  Thus 
  it 
  happens, 
  that 
  positive 
  ions 
  and 
  electrons 
  produced 
  

   by 
  the 
  scission 
  of 
  the 
  doublets 
  are 
  driven 
  by 
  their 
  speed 
  

   towards 
  the 
  bottom 
  of 
  the 
  tube, 
  which 
  most 
  of 
  the 
  latter 
  will 
  

   easily 
  reach, 
  while 
  the 
  positive 
  ions 
  will 
  stop 
  before, 
  and 
  form 
  

   the 
  virtual 
  anode. 
  This 
  long 
  explanation 
  is 
  not 
  unnecessary 
  

   here 
  in 
  view 
  of 
  the 
  objections 
  brought 
  forward, 
  as 
  the 
  reader 
  

   may 
  now 
  remove 
  them 
  by 
  himself. 
  

  

  