﻿of 
  Water-Vapour 
  Ly 
  Electric 
  Sparks. 
  97 
  

  

  The 
  following 
  results 
  were 
  obtained 
  with 
  this 
  apparatus 
  : 
  — 
  

  

  5 
  

   g 
  

  

  "S 
  

   <& 
  

  

  <D 
  

   O 
  

  

  d 
  

  

  1. 
  

   2 
  

  

  3. 
  

   4. 
  

   6. 
  

  

  Vol. 
  of 
  H 
  liberated 
  in 
  

   voltameter. 
  

  

  Excess 
  of 
  Hydrogen 
  

   from 
  Bulb 
  D. 
  

  

  Excess 
  of 
  Oxygen 
  

   from 
  Gr 
  and 
  H. 
  

  

  Direct 
  estimation 
  

   by 
  volume. 
  

  

  Estimated 
  by 
  

   analysis. 
  

  

  Vol. 
  of 
  excess 
  of 
  H 
  

   if 
  1 
  c.c. 
  of 
  H 
  

   was 
  liberated 
  in 
  

   voltameter. 
  

  

  a 
  

  

  Estimated 
  by 
  

   analysis. 
  

  

  Vol. 
  of 
  excess 
  of 
  O 
  

   if 
  1 
  c.o. 
  H 
  was 
  

   liberated 
  in 
  vol- 
  

   tameter. 
  

  

  0-545 
  c.c. 
  

   0-795 
  c.o. 
  

   1-175 
  c.c. 
  

   1-005 
  c.c. 
  

   0-312 
  c.c. 
  

  

  ! 
  6-06 
  c.c. 
  

  

  i 
  8-86 
  c.c 
  

  

  ; 
  7-88 
  c.c. 
  

  

  6-41 
  c.c 
  

  

  5-11 
  c.c. 
  

  

  6-05 
  c.c 
  

  

  6-38 
  c.c 
  

   5-01 
  c.c. 
  

  

  11-10 
  c.c. 
  

   11-14 
  c.c. 
  

  

  6-70 
  c.c. 
  

  

  6-35 
  c.c. 
  

   16-06 
  c.c. 
  

  

  2-96 
  c.c. 
  

   4-13 
  c.c. 
  

   3-87 
  c.c. 
  

   3-16 
  c.c. 
  

   ! 
  2-52 
  c.c. 
  

  

  2-89 
  c.c. 
  

   3-14 
  c.c. 
  

  

  5-12 
  c.c. 
  

   5-19 
  c.c. 
  

   3-30 
  c.c 
  

   3-12 
  c.c 
  

   8-07 
  c.c. 
  

  

  In 
  three 
  experiments 
  the 
  total 
  gas 
  collected 
  from 
  the 
  

   bulb 
  D 
  was 
  carefully 
  analysed 
  in 
  order 
  to 
  see 
  whether 
  the 
  

   percentage 
  of 
  oxygen 
  contained 
  in 
  it 
  diminished 
  as 
  the 
  stream 
  

   of 
  vapour 
  became 
  more 
  and 
  more 
  rapid. 
  

  

  In 
  the 
  first 
  experiment 
  (No. 
  6) 
  the 
  stream 
  of 
  vapour 
  was 
  

  

  °» 
  

  

  H 
  2 
  

  

  comparatively 
  slow, 
  and 
  the 
  ratio 
  ^- 
  was 
  found 
  to 
  be 
  

   1-274 
  

  

  7*564 
  

  

  = 
  0-169, 
  

  

  therefore 
  the 
  gas 
  contained 
  16'9 
  per 
  cent, 
  oxygen. 
  

  

  In 
  the 
  second 
  experiment 
  (No. 
  2) 
  the 
  current 
  of 
  water- 
  

   vapour 
  was 
  more 
  rapid, 
  and 
  the 
  ratio 
  ~ 
  was 
  

  

  H< 
  

  

  0-34 
  

  

  9-54 
  

  

  0-035, 
  

  

  so 
  that 
  the 
  gas 
  contained 
  only 
  3' 
  5 
  per 
  cent, 
  oxygen. 
  

  

  In 
  a 
  third 
  experiment 
  (No. 
  5), 
  in 
  which 
  the 
  stream 
  of 
  

   vapour 
  was 
  extremely 
  rapid, 
  nearly 
  pure 
  hydrogen 
  was 
  

   obtained. 
  These 
  results 
  are 
  exactly 
  what 
  one 
  would 
  expect 
  

   if 
  the 
  separation 
  of 
  the 
  oxygen 
  and 
  hydrogen 
  is 
  a 
  diffusion- 
  

   phenomenon. 
  A 
  number 
  of 
  experiments 
  were 
  next 
  per- 
  

  

  PUl. 
  Mag. 
  S. 
  6. 
  Vol. 
  16. 
  No. 
  91. 
  July 
  1908. 
  H 
  

  

  