﻿496 
  Prof. 
  Lyle 
  and 
  Mr. 
  Hosking 
  on 
  the 
  Conductivity 
  

  

  If, 
  however, 
  we 
  admit 
  that 
  both 
  sets 
  of 
  isothermals 
  meet 
  

   the 
  axis 
  of 
  abscissae 
  at 
  a 
  point 
  corresponding 
  to 
  a 
  con- 
  

   centration 
  of 
  10*74 
  gr.-mol. 
  per 
  litre, 
  it 
  would 
  indicate 
  

   obviously 
  that 
  such 
  a 
  solution, 
  if 
  physically 
  possible, 
  would 
  

   at 
  all 
  temperatures 
  have 
  zero 
  fluidity 
  and 
  zero 
  sp.-mol. 
  

   conductivity. 
  

  

  From 
  these 
  isothermal 
  curves 
  values 
  were 
  obtained 
  at 
  

   different 
  temperatures 
  of 
  the 
  fluidity 
  and 
  the 
  sp.-mol. 
  con- 
  

   ductivity 
  for 
  solutions 
  of 
  constant 
  concentration 
  throughout, 
  

   namely,' 
  for 
  O'l, 
  0'2, 
  05, 
  1*0, 
  2*0, 
  3*0, 
  4'0 
  gr.-mol. 
  per 
  litre. 
  

   From 
  the 
  same 
  curves 
  also, 
  by 
  extrapolation, 
  we 
  obtained 
  

   the 
  values 
  of 
  the 
  fluidity 
  and 
  the 
  sp.-mol. 
  conductivity 
  at 
  

   infinite 
  dilution 
  for 
  all 
  temperatures 
  between 
  0° 
  C. 
  and 
  

   100° 
  C. 
  

  

  These 
  results 
  are 
  collected 
  in 
  Tables 
  VII. 
  and 
  VIII., 
  and 
  

   plotted 
  on 
  Plate 
  XI. 
  The 
  curves 
  so 
  arrived 
  at 
  are 
  remarkable 
  

   in 
  that 
  they 
  indicate 
  that 
  for 
  solutions 
  of 
  the 
  strengths 
  

   experimented 
  with, 
  both 
  the 
  fluidity 
  and 
  the 
  sp.-mol. 
  con- 
  

   ductivity 
  vanish 
  at 
  a 
  temperature 
  of 
  —35°' 
  5 
  C. 
  

  

  It 
  is 
  obvious 
  at 
  once 
  from 
  these 
  constant-concentration 
  

   curves 
  that 
  the 
  temperature-coefficients 
  of 
  fluidity 
  and 
  sp.- 
  

   mol. 
  conductivity 
  are 
  not 
  identical, 
  though 
  the 
  two 
  sets 
  of 
  

   curves 
  possess 
  considerable 
  similarity. 
  

  

  The 
  values 
  of 
  the 
  ratio 
  of 
  the 
  sp.-mol. 
  conductivity 
  (C) 
  to 
  

   fluidity 
  (F) 
  were 
  now 
  calculated 
  for 
  solutions 
  of 
  constant 
  

   concentration 
  at 
  different 
  temperatures, 
  and 
  the 
  results 
  are 
  

   collected 
  in 
  Table 
  IX., 
  and 
  plotted 
  in 
  Plate 
  XII., 
  where 
  the 
  

   values 
  of 
  C/F 
  are 
  abscissae 
  with 
  the 
  corresponding 
  tem- 
  

   peratures 
  as 
  ordinates. 
  

  

  Table 
  VII. 
  — 
  Fluidity 
  (F) 
  at 
  Constant 
  Concentration, 
  

  

  Temp. 
  

  

  Infinite 
  

   Dilution. 
  

  

  n=0'l 
  

  

  n--0-2 
  

  

  n=0-o 
  

  

  n=l-0 
  

  

  «=2-0 
  

  

  w=3'0 
  

  

  w=4-0 
  

  

  0°C. 
  

  

  55-7 
  

  

  55-4 
  

  

  55-2 
  

  

  550 
  

  

  54-0 
  

  

  49-4 
  

  

  439 
  

  

  37-7 
  

  

  10 
  

  

  76-4 
  

  

  76-3 
  

  

  76-0 
  

  

  74-6 
  

  

  71-8 
  

  

  664 
  

  

  58-8 
  

  

  49-9 
  

  

  18 
  

  

  94-35 
  

  

  94-0 
  

  

  93-2 
  

  

  91-6 
  

  

  88-1 
  

  

  80-8 
  

  

  71'4 
  

  

  61-1 
  

  

  20 
  

  

  99-1 
  

  

  98-6 
  

  

  98-0 
  

  

  96-0 
  

  

  924 
  

  

  84-6 
  

  

  74-4 
  

  

  64-2 
  

  

  30 
  

  

  124-7 
  

  

  J 
  23-2 
  

  

  122-5 
  

  

  120-0 
  

  

  1150 
  

  

  104-5 
  

  

  921 
  

  

  79-1 
  

  

  40 
  

  

  1522 
  

  

  151-0 
  

  

  1498 
  

  

  1461 
  

  

  140-0 
  

  

  126-7 
  

  

  112-0 
  

  

  96-2 
  

  

  50 
  

  

  180-8 
  

  

  179-4 
  

  

  178-0 
  

  

  173-9 
  

  

  166-4 
  

  

  1493 
  

  

  131-4 
  

  

  113-7 
  

  

  60 
  

  

  211-9 
  

  

  210-0 
  

  

  208-0 
  

  

  202-0 
  

  

  192-0 
  

  

  172-6 
  

  

  1.52-8 
  

  

  132 
  9 
  

  

  70 
  

  

  245-7 
  

  

  243-2 
  

  

  241-0 
  

  

  234-0 
  

  

  222-4 
  

  

  198-9 
  

  

  1757 
  

  

  152-2 
  

  

  i 
  80 
  

  

  279-4 
  

  

  276-8 
  

  

  2740 
  

  

  266-1 
  

  

  252-8 
  

  

  226 
  

  

  192-2 
  

  

  172-6 
  

  

  90 
  

  

  316-5 
  

  

  313-3 
  

  

  310-0 
  

  

  300-0 
  

  

  283-9 
  

  

  251-7 
  

  

  2217 
  

  

  193-4 
  

  

  100 
  

  

  3509 
  

  

  347-1 
  

  

  343-4 
  

  

  332-5 
  

  

  3142 
  

  

  278-4 
  

  

  245-4 
  

  

  2170 
  

  

  