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   LXVIII. 
  Intelligence 
  and 
  Miscellaneous 
  Articles, 
  

  

  ON 
  THE 
  ELECTRIFICATION 
  OF 
  THE 
  ATMOSPHERE 
  AND 
  

   SURFACE 
  OF 
  THE 
  EARTH. 
  

  

  To 
  the 
  Editors 
  of 
  the 
  Philosophical 
  Magazine. 
  

  

  Gentlemen, 
  — 
  

   THINK 
  Dr. 
  Karl 
  Bergwitz's 
  interpretation 
  of 
  my 
  experiment 
  

   -*• 
  is 
  not 
  correct, 
  because 
  it 
  made 
  no 
  difference 
  in 
  the 
  final 
  result, 
  

   whether 
  the 
  plate 
  was 
  connected 
  to 
  the 
  electroscope 
  before 
  or 
  

   after 
  raising 
  from 
  the 
  earth. 
  What 
  might 
  be 
  said 
  in 
  criticism 
  

   is 
  that 
  the 
  plate 
  when 
  elevated 
  simply 
  gave 
  the 
  charge 
  present 
  

   in 
  the 
  air, 
  but 
  I 
  believe 
  this 
  not 
  to 
  be 
  the 
  case, 
  because 
  it 
  was 
  so 
  

   much 
  greater. 
  

  

  I 
  think 
  the 
  surface 
  condition 
  of 
  the 
  earth 
  in 
  hot 
  dry 
  places 
  may 
  

   be 
  very 
  different 
  from 
  that 
  observed 
  in 
  European 
  countries. 
  

   At 
  the 
  place 
  where 
  my 
  observations 
  were 
  taken 
  you 
  could 
  nob 
  

   discharge 
  an 
  electroscope 
  quickly 
  by 
  merely 
  putting 
  a 
  wire 
  in 
  

   connexion 
  with 
  the 
  surface 
  ; 
  in 
  fact 
  locally 
  the 
  surface 
  layer 
  was 
  

   o.n 
  insulator. 
  As 
  I 
  pointed 
  out 
  in 
  my 
  communication, 
  very 
  

   different 
  results 
  would 
  probably 
  follow 
  in 
  wet 
  weather. 
  

  

  Tours 
  faithfully, 
  

  

  ~W. 
  A. 
  Douglas 
  Kudge. 
  

  

  THE 
  MAGNETON 
  AND 
  PLANCK 
  S 
  UNIVERSAL 
  CONSTANT. 
  

   To 
  the 
  Editors 
  of 
  the 
  Philosophical 
  Magazine. 
  

   Gentlemen, 
  — 
  

  

  In 
  the 
  discussion 
  on 
  the 
  Theory 
  of 
  Eadiation 
  at 
  the 
  British 
  

   Association 
  Meeting 
  just 
  concluded, 
  Dr. 
  Bohr's 
  postulate 
  of 
  a 
  

   natural 
  unit 
  of 
  angular 
  momentum 
  was 
  very 
  prominent. 
  The 
  

   unit 
  actually 
  exists 
  and 
  is 
  to 
  be 
  found 
  in 
  the 
  magneton 
  (See 
  " 
  A 
  

   Theory 
  of 
  Gravity 
  " 
  in 
  this 
  number 
  of 
  your 
  Magazine). 
  A 
  

   magneton 
  of 
  any 
  cross-section 
  or 
  aperture 
  has, 
  I 
  find, 
  the 
  angular 
  

   momentum 
  about 
  its 
  axis 
  

  

  (87r 
  2 
  F)-W 
  e 
  ^. 
  

  

  Fis 
  the 
  velocity 
  of 
  light. 
  N 
  e 
  is 
  the 
  number 
  of 
  tubes 
  of 
  electric 
  

   induction 
  terminating 
  on 
  the 
  surface, 
  N^ 
  the 
  number 
  of 
  tubes 
  of 
  

   magnetic 
  induction 
  passing 
  through 
  the 
  aperture. 
  I 
  hope 
  with 
  

   your 
  permission 
  to 
  discuss 
  in 
  another 
  number 
  the 
  meaning 
  of 
  

   this 
  result 
  for 
  a 
  theory 
  of 
  radiation 
  and 
  matter. 
  By 
  making 
  

   Planck's 
  li 
  an 
  angular 
  momentum, 
  Dr. 
  Bohr 
  has 
  introduced 
  an 
  

   idea 
  of 
  the 
  first 
  importance. 
  

  

  I 
  am, 
  Gentlemen, 
  

  

  Yours 
  faithfully, 
  

   University 
  College, 
  Eeading. 
  S. 
  B. 
  McLaren. 
  

  

  