﻿352 
  

  

  Mr. 
  W. 
  Sutherland 
  on 
  

  

  gases 
  has 
  been 
  applied 
  without 
  change. 
  The 
  values 
  calcu- 
  

   lated 
  for 
  IOOC7288 
  belong 
  to 
  an 
  imaginary 
  mean 
  ion. 
  For 
  

   the 
  positive 
  and 
  negative 
  ions 
  separately 
  they 
  can 
  be 
  found 
  

   by 
  using 
  Ui 
  and 
  i<2, 
  instead 
  o£ 
  their 
  mean 
  u. 
  In 
  the 
  last 
  line 
  

   100C/{2ayi28S 
  has 
  been 
  given. 
  For 
  four 
  out 
  of 
  five 
  element 
  

   gases 
  it 
  is 
  nearly 
  710. 
  the 
  exceptional 
  value 
  for 
  CI2 
  being 
  

   359. 
  For 
  the 
  three 
  compound 
  gases 
  the 
  values 
  are 
  not 
  far 
  

   from 
  1385, 
  which 
  is 
  nearly 
  2 
  x 
  710. 
  At 
  15° 
  C. 
  both 
  CO2 
  

   and 
  N2O 
  are 
  a 
  few 
  degrees 
  below 
  their 
  critical 
  temperature, 
  

   so 
  that 
  their 
  actual 
  condition 
  does 
  not 
  comply 
  with 
  the 
  

   stipulations 
  made 
  in 
  obtaining 
  the 
  theoretical 
  equations. 
  

   Probably 
  the 
  error 
  introduced 
  is 
  not 
  great. 
  But 
  in 
  the 
  case 
  

   of 
  the 
  more 
  easily 
  liquefied 
  gases 
  with 
  higher 
  critical 
  tem- 
  

   perature 
  like 
  NH3, 
  SO2, 
  and 
  HCl, 
  and 
  of 
  the 
  vapours 
  of 
  

   liquids 
  the 
  orbit 
  of 
  the 
  relative 
  motion 
  of 
  ion 
  and 
  molecule 
  

   after 
  collision 
  will 
  be 
  too 
  often 
  a 
  curve 
  of 
  finite 
  range 
  to 
  

   allow 
  the 
  theory 
  founded 
  upon 
  infinite 
  range 
  to 
  hold. 
  

   Nevertheless, 
  for 
  the 
  sake 
  of 
  information 
  I 
  shall 
  apply 
  (14) 
  

   to 
  the 
  data 
  for 
  easily 
  liquefied 
  gases 
  and 
  vapours 
  For 
  these 
  

   the 
  values 
  of 
  B 
  can 
  be 
  obtained 
  from 
  " 
  Further 
  Studies 
  on 
  

   Molecular 
  Force'' 
  (Phil. 
  Mag. 
  [5] 
  xxxix. 
  p. 
  1). 
  

  

  Table 
  III. 
  

  

  NH3. 
  SO2. 
  HCl, 
  C,H.C1. 
  C,Hi2. 
  CH3CO2. 
  CH3(C2H5)20. 
  CH3COAH5 
  

  

  B 
  21 
  35 
  27 
  57 
  93-5 
  62 
  82 
  80 
  

  

  lOOu 
  73 
  41 
  127 
  31 
  34 
  31 
  29 
  28 
  

  

  M 
  17 
  64 
  36-5 
  64-5 
  72 
  74 
  74 
  88 
  

  

  10007288 
  ... 
  366 
  204 
  53 
  190 
  80 
  156 
  127 
  119 
  

  

  10B2/3C7288. 
  274 
  218 
  48 
  281 
  165 
  244 
  240 
  221 
  

  

  

  CHaBr. 
  

  

  CH3L 
  

  

  COI4. 
  

  

  C2H5I; 
  

  

  Aldehyde. 
  

  

  Alcohol. 
  

  

  Acetom 
  

  

  B 
  

  

  47 
  

  

  28 
  

  

  57 
  

   21 
  

  

  84-5 
  

   30 
  

  

  74 
  

   16 
  

  

  39-5 
  

   29 
  

  

  48 
  

   29 
  

  

  56-5 
  

  

  100m 
  

  

  29 
  

  

  M 
  

  

  95 
  

  

  142 
  

  

  lc4 
  

  

  156 
  

  

  44 
  

  

  46 
  

  

  58 
  

  

  10007288... 
  

  

  201 
  

  

  188 
  

  

  47 
  

  

  203 
  

  

  376 
  

  

  311 
  

  

  229 
  

  

  10B2/3C7288. 
  

  

  262 
  

  

  278 
  

  

  90 
  

  

  358 
  

  

  436 
  

  

  411 
  

  

  337 
  

  

  In 
  this 
  table 
  we 
  notice 
  that 
  when 
  much 
  the 
  greater 
  part 
  

   of 
  the 
  mass 
  of 
  a 
  molecule 
  consists 
  of 
  chlorine 
  as 
  in 
  HCl 
  and 
  

   CCI4, 
  the 
  potential 
  energy 
  measured 
  by 
  100C7288 
  is 
  con- 
  

  

  