﻿the 
  Vapour-Pressure 
  of 
  Mercury. 
  

   Table 
  I. 
  

  

  791 
  

  

  Temp. 
  

  

  Pressure 
  of 
  Mercury 
  Vapour 
  in 
  mms. 
  according 
  to 
  

  

  Van 
  cler 
  Plaats. 
  

  

  Hagen. 
  

  

  McLeod. 
  

  

  Hertz, 
  Pfaundler, 
  

   Morley. 
  

  

  o 
  

   10 
  

  

  •008 
  

   •013 
  

  

  •042 
  

  

  •00574 
  

  

  •00042 
  

   •00109 
  

   •0122 
  

  

  20 
  

  

  50 
  

  

  

  In 
  order 
  that 
  the 
  experiments 
  of 
  each 
  observer 
  should 
  

   contribute 
  about 
  equally 
  to 
  the 
  final 
  result 
  of 
  my 
  reduction, 
  

   some 
  of 
  the 
  numerically 
  fewer 
  observations 
  of 
  Ramsay 
  & 
  

   Young, 
  and 
  Young 
  alone 
  have 
  have 
  been 
  given 
  2 
  f? 
  3, 
  or 
  

   4 
  times 
  the 
  weight 
  of 
  the 
  other 
  observations, 
  according 
  to 
  

   the 
  accuracy 
  the 
  writer 
  attached 
  to 
  the 
  measurement 
  of 
  the 
  

   temperature 
  concerned. 
  

  

  Table 
  II. 
  

   Observed 
  Vapour-Pressures 
  of 
  Mercury. 
  

  

  

  Temp. 
  

  

  Pressure, 
  

  

  

  Temp. 
  

  

  Pressure, 
  

  

  

  Temp. 
  

  

  Pressure, 
  

  

  

  °C. 
  

  

  in 
  mm. 
  

  

  

  °C. 
  

  

  in 
  mm. 
  

  

  

  °0. 
  

  

  in 
  mm. 
  

  

  P. 
  

  

  15 
  

  

  •00081 
  

  

  RY. 
  

  

  183-4* 
  

  

  9-87 
  

  

  G. 
  

  

  268 
  

  

  1229 
  

  

  M. 
  

  

  16 
  

  

  •0010 
  

  

  H. 
  

  

  184-7 
  

  

  1104 
  

  

  RY. 
  

  

  270-3 
  

  

  124-35 
  

  

  M. 
  

  

  30 
  

  

  •0027 
  

  

  G. 
  

  

  188 
  

  

  12-51 
  

  

  G. 
  

  

  271-5 
  

  

  12611 
  

  

  M. 
  

  

  40 
  

  

  •0052 
  

  

  H. 
  

  

  190-4 
  

  

  12-89 
  

  

  G. 
  

  

  277-5 
  

  

  150-8 
  

  

  M. 
  

  

  50 
  

  

  •0113 
  

  

  H. 
  

  

  203 
  

  

  20-35 
  

  

  G. 
  

  

  278-5 
  

  

  147-5 
  

  

  P. 
  

  

  563 
  

  

  •01801 
  

  

  H. 
  

  

  206-9 
  

  

  22-58 
  

  

  RY. 
  

  

  280-2 
  

  

  157'15 
  

  

  M. 
  

  

  60 
  

  

  •0214 
  

  

  G. 
  

  

  207 
  

  

  21-07 
  

  

  G. 
  

  

  286-5 
  

  

  185-0 
  

  

  M. 
  

  

  70 
  

  

  •0404 
  

  

  EY. 
  

  

  222-15 
  

  

  34-4 
  

  

  G. 
  

  

  295-5 
  

  

  224-9 
  

  

  H. 
  

  

  89-4 
  

  

  •16 
  

  

  G. 
  

  

  224-5 
  

  

  38-82 
  

  

  I 
  G. 
  

  

  3025 
  

  

  263-9 
  

  

  P. 
  

  

  98-8 
  

  

  •26305 
  

  

  G. 
  

  

  230-5 
  

  

  46-49 
  

  

  G. 
  

  

  309-5 
  

  

  308-1 
  

  

  H. 
  

  

  117 
  

  

  •71 
  

  

  G. 
  

  

  236 
  

  

  51-58 
  

  

  G. 
  

  

  3150 
  

  

  360-2 
  

  

  G. 
  

  

  129 
  

  

  10 
  

  

  RY. 
  

  

  236-95 
  

  

  51-85 
  

  

  CG. 
  

  

  356-7 
  

  

  760 
  

  

  H. 
  

  

  154-2 
  

  

  3-49 
  

  

  G. 
  

  

  245 
  

  

  68-42 
  

  

  C. 
  

  

  400 
  

  

  1596 
  

  

  G. 
  

  

  157-5 
  

  

  3-93 
  

  

  G. 
  

  

  248 
  

  

  71-39 
  

  

  Y. 
  

  

  403-15 
  

  

  2896-9 
  

  

  H. 
  

  

  165-8 
  

  

  5-52 
  

  

  G. 
  

  

  255 
  

  

  87-87 
  

  

  Y. 
  

  

  4039 
  

  

  2904-5 
  

  

  G. 
  

  

  176-5 
  

  

  8-22 
  

  

  G. 
  

  

  256 
  

  

  94-4 
  

  

  C. 
  

  

  450 
  

  

  3230 
  

  

  H. 
  

  

  177'4 
  

  

  8-2 
  

  

  G. 
  

  

  264 
  

  

  105-69 
  

  

  

  

  

  Taking 
  the 
  boiling-point 
  of 
  aniline 
  as 
  184 
  0, 
  1. 
  

  

  t 
  See 
  Table 
  III., 
  under 
  A 
  : 
  this 
  weight 
  is 
  indicated 
  by 
  x2, 
  &c. 
  

  

  