﻿Adsorption 
  of 
  Hydrogen 
  hy 
  Carbon. 
  

  

  y25 
  

  

  interior. 
  I£ 
  a 
  small 
  amount 
  o£ 
  gas 
  be 
  then 
  quickly 
  intro- 
  

   duced 
  before 
  this 
  very 
  unstable 
  condition 
  has 
  disappeared, 
  

   the 
  interior 
  is 
  still 
  surcharged 
  with 
  respect 
  even 
  to 
  the 
  new 
  

   (intermediate) 
  pressure, 
  and 
  it 
  will 
  continue 
  to 
  give 
  off 
  g:is. 
  

   But 
  this 
  effect 
  is 
  masked 
  for 
  a 
  few 
  moments 
  because 
  the 
  

   surface 
  is 
  not 
  saturated 
  with 
  gas 
  at 
  the 
  new 
  pressure, 
  and 
  

   consequently 
  the 
  hydrogen 
  very 
  rapidly 
  condenses 
  to 
  make 
  

   up 
  the 
  deficiency. 
  

  

  It 
  is 
  clear 
  that 
  the 
  cycle 
  of 
  changes 
  must 
  be 
  rapidly 
  carried 
  

   through, 
  and 
  the 
  following 
  experiment 
  shows 
  how 
  well 
  the 
  

   predictions 
  are 
  confirmed. 
  The 
  carbon 
  had 
  previously 
  stood 
  

   in 
  liquid 
  air, 
  and 
  exposed 
  to 
  62*84 
  c.c. 
  (corr.) 
  of 
  hydrogen, 
  

   for 
  twenty-four 
  hours. 
  After 
  this 
  the 
  liquid-air 
  vessel 
  was 
  

   filled 
  up 
  to 
  the 
  top 
  once 
  more, 
  about 
  an 
  hour 
  before 
  the 
  

   experiment 
  began. 
  

  

  Table 
  VIII. 
  

  

  Eemarks. 
  

  

  Time. 
  

  

  Pressure. 
  

  

  Difference. 
  

  

  Pumped 
  out 
  14-72 
  c.c. 
  (corr.). 
  

  

  minute. 
  

  

  22-0 
  mm. 
  

  

  _ 
  

  

  Added 
  4-70 
  c.c. 
  (corr.). 
  

  

  0-4i 
  minutes. 
  

  

  — 
  

  

  

  

  4h 
  ,. 
  

  

  

  

  

  

  63 
  , 
  

  

  14-59 
  mm. 
  

  

  1 
  

   — 
  

  

  

  8 
  „ 
  

  

  14-54 
  „ 
  

  

  -0-05 
  mm.' 
  

  

  

  10 
  „ 
  

  

  14-58 
  „ 
  

  

  -001 
  „ 
  1 
  

  

  

  12 
  

  

  14-63 
  ,. 
  

  

  +004 
  „ 
  1 
  

  

  

  14 
  

  

  14-66 
  „ 
  

  

  +0-07 
  „ 
  1 
  

  

  

  25 
  

  

  14-78 
  „ 
  

  

  +0-19 
  „ 
  1 
  

  

  

  47 
  

  

  14-87 
  „ 
  

  

  +0-28 
  „ 
  i 
  

  

  

  2 
  hours. 
  

  

  1503 
  „ 
  

  

  +0-44 
  „ 
  1 
  

  

  

  5i 
  „ 
  

  

  15-42 
  „ 
  

  

  +0-83 
  „ 
  ! 
  

  

  

  20 
  „ 
  

  

  16-51 
  „ 
  

  

  + 
  1-92 
  „ 
  1 
  

  

  i 
  

  

  The 
  characteristic 
  phenomena 
  of 
  the 
  previous 
  experiments 
  

   have 
  here 
  been 
  reversed 
  (in 
  the 
  most 
  thoroughgoing 
  manner), 
  

   and 
  yet 
  the 
  results 
  are 
  entirely 
  in 
  accordance 
  with 
  the 
  

   hypothesis 
  that 
  has 
  been 
  advanced. 
  

  

  Blank 
  Experiment. 
  

  

  The 
  complexity 
  of 
  the 
  pressure 
  changes 
  described 
  in 
  the 
  

   foregoing 
  paragraphs 
  makes 
  it 
  desirable 
  to 
  be 
  certain 
  that 
  

   these 
  complications 
  do 
  not 
  occur 
  where 
  not 
  predicted 
  by 
  the 
  

   theory 
  of 
  the 
  process 
  which 
  I 
  have 
  advanced. 
  In 
  the 
  follow- 
  

   ing 
  experiment 
  a 
  portion 
  of 
  the 
  gas 
  was 
  removed 
  from 
  the 
  

   apparatus 
  after 
  the 
  carbon 
  had 
  been 
  standing 
  for 
  a 
  day 
  in 
  

   contact 
  with 
  it 
  at 
  the 
  temperature 
  of 
  liquid 
  air. 
  The 
  total 
  

  

  