﻿154 
  

  

  Prof. 
  Kuenen 
  and 
  Mr. 
  Robson 
  on 
  

  

  Table 
  I. 
  

   Vapour- 
  Pressures 
  of 
  Carbon 
  Dioxide. 
  

  

  Temperature 
  (Cent.). 
  

  

  Pressure 
  (Atmos.). 
  

  

  

   - 
  9-95 
  

  

  -15-27 
  

   -21-67 
  

   -27 
  01 
  

   -32-88 
  

   -33-08 
  

   -41-02 
  

   -47-58 
  

   -54-52 
  * 
  

   -54-68 
  

   -56-18 
  

   -56-24 
  

   -57-80 
  

   -57-87 
  

   -61-41 
  

   -61-60 
  

   -62-39 
  

   -62-47 
  

   -63-13 
  

  

  34-34 
  

  

  26-04 
  (Low 
  Gauge). 
  

  

  25-99 
  (High 
  Gar.ge). 
  

  

  22 
  23 
  

  

  18-32 
  

  

  15-42 
  

  

  12-60 
  

  

  12-59 
  

  

  9-46 
  

  

  7-34 
  

  

  5-45 
  

  

  5-45 
  

  

  510 
  

  

  510 
  (Triple 
  Point). 
  

  

  4-743 
  

  

  4746 
  

  

  4018 
  

  

  3-991 
  

  

  3-823 
  

  

  3-809 
  

  

  3-685 
  

  

  Solid 
  Carbon 
  Dioxide. 
  

  

  Temperature. 
  

  

  Pressure. 
  

  

  4-580 
  

   3-532 
  

   3129 
  

   1-683 
  

   1072 
  

   1000 
  

  

  -57-86 
  " 
  

  

  -61-80 
  

  

  -63-36 
  

  

  -71-41 
  

  

  -76-90 
  

  

  -78-32 
  

  

  These 
  results 
  were 
  plotted, 
  and 
  Table 
  II. 
  gives 
  the 
  vapour- 
  

   pressure 
  for 
  every 
  five 
  degrees 
  as 
  read 
  from 
  the 
  curve. 
  The 
  

   pressure 
  at 
  0°C. 
  agrees 
  with 
  that 
  found 
  by 
  Amagat 
  f 
  (34*3 
  

   and 
  34*4 
  atmos.) 
  %. 
  

  

  f 
  Ann. 
  de 
  Chim. 
  et 
  Phys. 
  [6] 
  xxix. 
  pp. 
  118, 
  13b. 
  

  

  \ 
  Holborn 
  {Ann. 
  der 
  Physik,\\. 
  p. 
  245) 
  finds 
  —78*34 
  for 
  the 
  boiling- 
  

   point 
  of 
  carbon 
  dioxide 
  under 
  normal 
  pressure. 
  

  

  