﻿750 
  

  

  Mr. 
  W. 
  T. 
  Kennedy 
  on 
  the 
  Active 
  Deport 
  

  

  The 
  maximum 
  activity 
  for 
  the 
  cathode 
  was 
  obtained 
  at 
  a 
  

   pressure 
  of 
  80 
  mm., 
  while 
  that 
  on 
  the 
  anode 
  was 
  not 
  obtained 
  

   until 
  a 
  pressure 
  of 
  17 
  mm. 
  was 
  reached. 
  The 
  maximum 
  

   cathodic 
  deposit, 
  it 
  will 
  be 
  seen, 
  too, 
  was 
  only 
  about 
  2*75 
  

   times 
  that 
  obtained 
  on 
  the 
  anode. 
  

  

  From 
  time 
  to 
  time 
  decay 
  curves 
  were 
  drawn 
  for 
  the 
  active 
  

   deposits 
  obtained 
  on 
  the 
  two 
  electrodes, 
  and 
  it 
  was 
  always 
  

   found 
  that 
  these 
  deposits 
  decreased 
  in 
  activity 
  to 
  half 
  value 
  

   in 
  about 
  39 
  minutes, 
  irrespective 
  of 
  the 
  electrodes 
  upon 
  which 
  

   they 
  were 
  obtained. 
  This 
  fact, 
  combined 
  with 
  the 
  similarity 
  

   of 
  form 
  in 
  the 
  activity 
  curves 
  for 
  the 
  two 
  electrodes, 
  goes 
  to 
  

   show 
  that 
  with 
  both 
  electrodes 
  the 
  deposit 
  always 
  consisted 
  

   of 
  the 
  same 
  transmutation 
  product 
  or 
  products, 
  and 
  that 
  the 
  

   difference 
  in 
  the 
  amounts 
  obtained 
  on 
  the 
  two 
  terminals 
  must 
  

   be 
  traceable 
  either 
  to 
  differences 
  in 
  the 
  charge 
  acquired 
  by 
  the 
  

   deposit 
  particles 
  in 
  their 
  passage, 
  by 
  diffusion 
  or 
  otherwise, 
  

   through 
  the 
  air, 
  or 
  to 
  the 
  phenomenon 
  of 
  recoil 
  recently 
  

   noted 
  by 
  Otto 
  Hahn 
  *. 
  

  

  VII. 
  Activity/ 
  of 
  Deposits 
  obtained 
  in 
  Carbon 
  Dioxide 
  

   at 
  different 
  Pressures. 
  

  

  In 
  order 
  to 
  study 
  how 
  the 
  deposits 
  might 
  be 
  affected 
  by 
  a 
  

   modification 
  in 
  the 
  conditions 
  of 
  their 
  diffusion 
  a 
  set 
  of 
  

   measurements, 
  similar 
  to 
  those 
  carried 
  out 
  with 
  air, 
  was 
  

   made 
  with 
  carbon 
  dioxide 
  at 
  pressures 
  varying 
  from 
  750 
  mm. 
  

   to 
  1 
  mm. 
  of 
  mercury, 
  and 
  the 
  values 
  of 
  the 
  active 
  deposits 
  

   obtained 
  are 
  recorded 
  in 
  Table 
  IV. 
  From 
  these 
  results 
  

  

  Table 
  IV. 
  

  

  , 
  Pressure. 
  

  

  Activity 
  on 
  the 
  

  

  Activity 
  on 
  the 
  

  

  Cathode. 
  

  

  Anode. 
  

  

  I'O 
  mm. 
  

  

  15-6 
  

  

  14-7 
  

  

  8-0 
  „ 
  

  

  37-5 
  

  

  28-5 
  

  

  ISO 
  „ 
  

  

  60-5 
  

  

  29-5 
  

  

  30-0 
  „ 
  

  

  75-5 
  

  

  19-6 
  

  

  400 
  „ 
  

  

  79-5 
  

  

  16-0 
  

  

  73-0 
  „ 
  

  

  81-6 
  

  

  9-0 
  

  

  105-0 
  „ 
  

  

  72-0 
  

  

  70 
  

  

  123-0 
  „ 
  

  

  66-5 
  

  

  5-8 
  

  

  2360 
  „ 
  

  

  46-7 
  

  

  3-0 
  

  

  480-0 
  ., 
  

  

  22-0 
  

  

  2^2 
  

  

  7500 
  „ 
  

  

  11-7 
  

  

  •75 
  

  

  curves 
  in 
  figs. 
  11 
  and 
  12 
  (PI. 
  XXII.) 
  have 
  been 
  drawn. 
  It 
  

   will 
  be 
  seen 
  that 
  these 
  curves 
  also 
  follow 
  laws 
  similar 
  to 
  those 
  

   * 
  Deut. 
  Phys. 
  Ges. 
  xi. 
  Jahr, 
  no. 
  3. 
  

  

  