﻿878 
  

  

  On 
  the 
  Coefficient 
  of 
  Diffusion, 
  

  

  10. 
  Conclusion, 
  

  

  My 
  chief 
  object 
  in 
  bringing 
  this 
  paper 
  before 
  the 
  Physical 
  

   Society 
  of 
  London 
  in 
  its 
  present 
  state 
  has 
  been 
  the 
  hope 
  of 
  

   obtaining 
  from 
  the 
  Fellows 
  some 
  useful 
  suggestions 
  for 
  future 
  

   work, 
  or 
  improvements 
  in 
  the 
  method. 
  

  

  In 
  all 
  43 
  experiments 
  have 
  been 
  performed; 
  many 
  of 
  

   them, 
  described 
  in 
  this 
  paper, 
  have 
  had 
  the 
  sole 
  object 
  o£ 
  

   endeavouring 
  to 
  obtain 
  information 
  of 
  the 
  best 
  experimental 
  

   conditions. 
  

  

  The 
  numerical 
  results 
  of 
  some 
  of 
  the 
  others 
  have 
  not 
  

   been 
  -tared, 
  as 
  improvements 
  in 
  the 
  method, 
  which 
  they 
  

   have 
  suggested, 
  have 
  rendered 
  the 
  numerical 
  result 
  un- 
  

   satisfactory. 
  

  

  The 
  value- 
  of 
  the 
  coefficient 
  of 
  diffusion 
  at 
  0° 
  C, 
  which 
  

   the 
  investigation 
  indicates 
  to 
  be 
  mosl 
  trustworthy, 
  are 
  those 
  

   obtained 
  with 
  the 
  suspended 
  apparatus 
  filled 
  with 
  the 
  salt 
  

   solution, 
  in 
  the 
  larger 
  copper 
  vessel 
  containing 
  distilled 
  

   water. 
  These 
  results 
  are 
  

  

  Experiment, 
  

  

  - 
  ; 
  KNO.,. 
  

  

  Experiment. 
  

  

  Salt 
  KOI. 
  

  

  Concen. 
  K 
  ,- 
  L0 
  B 
  . 
  

   10 
  p. 
  cent. 
  '843 
  

   10 
  ,. 
  -845 
  

  

  Concen. 
  

  

  KxlO'. 
  

  

  16 
  

  

  17 
  

  

  22 
  

  

  23 
  

  

  24 
  

  

  25 
  

  

  20 
  p. 
  cent. 
  

   20 
  

  

  •966 
  

  

  •'.ITS 
  

  

  20 
  

  

  27 
  

  

  " 
  — 
  

  

  5 
  ]>. 
  cent. 
  

  

  •871 
  

  

  10 
  p. 
  cent. 
  

   10 
  „ 
  

  

  •953 
  

   •956 
  

  

  The 
  results 
  show 
  that 
  the 
  method 
  is 
  capable 
  of 
  yielding 
  

   consistent 
  values, 
  and 
  if 
  compared 
  with 
  those 
  obtained 
  by 
  

   other 
  observers 
  in 
  the 
  same 
  subject, 
  although 
  the 
  concentra- 
  

   tion 
  of 
  the 
  solutions 
  and 
  the 
  temperatures 
  at 
  which 
  they 
  were 
  

   employed 
  vary 
  considerably, 
  thus 
  making 
  comparison 
  difficult, 
  

   yet 
  the 
  agreement, 
  as 
  far 
  as 
  can 
  be 
  judged, 
  appears 
  to 
  be 
  

   satisfactory. 
  

  

  For 
  instance, 
  results 
  expressed 
  in 
  C.G.s. 
  units, 
  obtained 
  by 
  

   Schuhmeister 
  and 
  by 
  Scheffer 
  for 
  KC1 
  and 
  for 
  KN0 
  3 
  

   respectively 
  are 
  shown 
  below 
  

  

  