﻿922 
  Dr. 
  J, 
  W. 
  McBain 
  on 
  the 
  Mechanism 
  of 
  the 
  

  

  Table 
  YI. 
  

  

  Eemarks. 
  

  

  Time. 
  

  

  Pressure. 
  

  

  Difference. 
  

  

  Put 
  in 
  71-20 
  c.c. 
  (corr.) 
  

  

  - 
  i 
  minute. 
  

  

  29-0 
  mm. 
  

  

  

  

  Took 
  out 
  12-49 
  c.c. 
  (corr.) 
  ... 
  

  

  3^-5^ 
  minutes. 
  

  

  — 
  

  

  — 
  

  

  

  7 
  

  

  18-48 
  mm. 
  

  

  — 
  

  

  

  9 
  

  

  18-33 
  „ 
  

  

  — 
  0"15 
  mm. 
  

  

  

  11 
  

  

  1811 
  „ 
  

  

  -0-37 
  „ 
  

  

  

  16| 
  „ 
  

  

  17-78 
  „ 
  

  

  -0-70 
  „ 
  

  

  

  22 
  „ 
  

  

  17-46 
  „ 
  

  

  -1-02 
  „ 
  

  

  

  S7k 
  „ 
  

  

  17-21 
  „ 
  

  

  -1-27 
  „ 
  

  

  

  54i 
  „ 
  

  

  16-66 
  „ 
  

  

  - 
  1-82 
  „ 
  

  

  

  95 
  

  

  16-25 
  „ 
  

  

  -2-23 
  „ 
  

  

  

  212 
  

  

  15-85 
  „ 
  

  

  -2-63 
  „ 
  

  

  

  275 
  

  

  15-72 
  „ 
  

  

  -2-76 
  „ 
  

  

  

  6 
  hours. 
  

  

  15-75 
  „ 
  

  

  -2-73 
  „ 
  

  

  

  19 
  „ 
  

  

  15-98 
  „ 
  

  

  -2-50 
  „ 
  

  

  

  23 
  „ 
  

  

  16-09 
  „ 
  

  

  -2-39 
  „ 
  

  

  Table 
  VIL 
  

  

  Eemarks. 
  

  

  Time. 
  

  

  Pressure. 
  

  

  Difference. 
  

  

  Added 
  75-52 
  c.c. 
  (corr.) 
  

  

  0-1 
  minute. 
  

  

  _ 
  

  

  : 
  

  

  

  3 
  minutes. 
  

  

  31-0 
  mm. 
  

  

  — 
  

  

  

  4 
  

  

  29-7 
  „ 
  

  

  — 
  1-3 
  mm. 
  

  

  Took 
  out 
  5-69 
  c.c. 
  (corr.) 
  

  

  4-41 
  „ 
  

  

  — 
  

  

  — 
  

  

  

  H 
  „ 
  

  

  25-18 
  mm. 
  

  

  — 
  1 
  

  

  

  7i 
  „ 
  

  

  25-05 
  „ 
  

  

  -0-13 
  mm. 
  1 
  

  

  

  9 
  „ 
  

  

  24-61 
  „ 
  

  

  -0-57 
  „ 
  1 
  

  

  

  13 
  „ 
  

  

  24-17 
  „ 
  

  

  -1-01 
  , 
  

  

  1 
  

  

  

  18| 
  „ 
  

  

  23-76 
  ., 
  

  

  -1-42 
  , 
  

  

  

  

  33i 
  „ 
  

  

  22-84 
  „ 
  

  

  -2-34 
  , 
  

  

  1 
  

  

  

  73^ 
  „ 
  

  

  21-52 
  „ 
  

  

  -3-66 
  , 
  

  

  

  

  117 
  

  

  20-74 
  „ 
  

  

  -4-44 
  , 
  

  

  1 
  

  

  

  4 
  hours. 
  

  

  20-56 
  „ 
  

  

  -4-62 
  , 
  

  

  1 
  

  

  

  7 
  „ 
  

  

  19-93 
  „ 
  

  

  -.5-25 
  , 
  

  

  1 
  

  

  

  8 
  „ 
  

  

  13-20 
  „ 
  

  

  -5-98 
  , 
  

  

  

  

  8i 
  „ 
  

  

  19-09 
  „ 
  

  

  -609 
  , 
  

  

  

  

  lOi 
  „ 
  

  

  18-98 
  „ 
  

  

  -6-20 
  , 
  

  

  

  

  12* 
  „ 
  

  

  19-01 
  „ 
  

  

  -6-17 
  , 
  

  

  

  

  28^ 
  „ 
  

  

  20-43 
  „ 
  

  

  -4-75 
  , 
  

  

  

  

  45 
  „ 
  

  

  24-01 
  „ 
  

  

  -1-17 
  , 
  

  

  

  The 
  importance 
  of 
  these 
  pressure 
  changes 
  may 
  now 
  be 
  

   discussed, 
  for 
  at 
  first 
  sight 
  their 
  magnitude 
  appears 
  to 
  be 
  

   insignificant. 
  Thus 
  in 
  Table 
  VII. 
  the 
  highest 
  pressure 
  re- 
  

   corded 
  is 
  that 
  at 
  6\ 
  minutes, 
  namely 
  25*2 
  mm., 
  and 
  the 
  

   lowest 
  at 
  llj 
  hours, 
  19*0 
  mm. 
  The 
  high 
  pressure 
  indicated 
  

   that 
  out 
  of 
  the 
  total 
  69*83 
  c.c. 
  (corr.) 
  of 
  hydrogen 
  in 
  the 
  

   apparatus 
  66*97 
  c.c. 
  (corr.) 
  was 
  taken 
  up 
  by 
  the 
  carbon, 
  and 
  

  

  