﻿Osmosis 
  and 
  Osmotic 
  Pressure. 
  

  

  255 
  

  

  is 
  reached 
  we 
  shall 
  generally 
  notice 
  a 
  fall 
  in 
  the 
  resistance, 
  

   especially 
  when 
  the 
  maximum 
  resistance 
  is 
  small. 
  In 
  the 
  

   best 
  cell 
  I 
  could 
  not 
  detect 
  any 
  fall, 
  although 
  the 
  electrolyis 
  

   was 
  continued 
  for 
  one 
  hour 
  after 
  the 
  maximum 
  resistance 
  

   was 
  reached. 
  

  

  When 
  the 
  electrolysis 
  has 
  finished 
  the 
  resistance 
  falls 
  very 
  

   rapidly, 
  as 
  will 
  be 
  seen 
  from 
  the 
  curve 
  fig. 
  6 
  (PL 
  VIII.). 
  And 
  

   for 
  each 
  time 
  the 
  process 
  is 
  repeated, 
  we 
  shall 
  have 
  an 
  

   increase 
  of 
  resistance 
  from 
  a 
  value 
  which 
  is 
  only 
  a 
  small 
  

   fraction 
  of 
  the 
  maximum 
  value 
  of 
  the 
  resistance. 
  Even 
  in 
  

   the 
  case 
  when 
  it 
  got 
  up 
  to 
  400,000 
  ohms 
  it 
  was 
  only 
  51,000 
  

   to 
  begin 
  with. 
  

  

  In 
  the 
  following 
  tables 
  is 
  shown 
  the 
  development 
  of 
  the 
  

   membrane 
  for 
  the 
  two 
  cells 
  S 
  and 
  A, 
  these 
  being 
  chosen 
  

   because 
  they 
  have 
  been 
  subject 
  to 
  a 
  somewhat 
  different 
  

   treatment. 
  

  

  Cell 
  S. 
  

  

  

  Date. 
  

  

  Duration 
  of 
  

   electrolysis. 
  

  

  Temp. 
  

  

  Potential. 
  

  

  Resistance. 
  

  

  

  

  1906, 
  Nov. 
  21... 
  

  

  h 
  30 
  m 
  

  

  

  -* 
  96 
  volts 
  

  

  4,500 
  ohms 
  

  

  

  

  „ 
  22... 
  

  

  1 
  10 
  

  

  

  -*114 
  „ 
  

  

  60,000 
  „ 
  

  

  

  

  „ 
  23... 
  1 
  

  

  9° 
  

  

  — 
  HI 
  „ 
  

  

  56,000 
  „ 
  

  

  

  

  „ 
  Dec. 
  5... 
  

  

  ... 
  

  

  6° 
  

  

  ^114 
  „ 
  

  

  45,000 
  „ 
  

  

  

  

  „ 
  11... 
  

  

  1 
  5 
  

  

  

  -*H4 
  „ 
  

  

  40,000 
  „ 
  

  

  

  

  „ 
  11... 
  

  

  20 
  

  

  

  230 
  „ 
  

  

  65,000 
  „ 
  

  

  

  

  „ 
  28... 
  

  

  1 
  

  

  12°'-2 
  

  

  115 
  „ 
  

  

  100,000 
  „ 
  

  

  

  

  1907, 
  June 
  11... 
  

  

  1 
  2 
  

  

  16° 
  

  

  >; 
  

  

  97,000 
  „ 
  

  

  

  

  „ 
  15... 
  2 
  5 
  

  

  

  „ 
  

  

  180,000 
  „ 
  

  

  

  

  ., 
  Sept, 
  19... 
  

  

  1 
  

  

  10° 
  

  

  

  220,000 
  „ 
  

  

  

  

  „ 
  Oct. 
  14... 
  

  

  1 
  40 
  

  

  40.5 
  

  

  

  320,000 
  „ 
  

  

  

  

  „ 
  24... 
  

  

  1 
  18 
  

  

  3° 
  

  

  j? 
  

  

  290.000 
  „ 
  

  

  

  

  „ 
  Nov. 
  12... 
  

  

  1 
  52 
  

  

  l°-6 
  

  

  >j 
  

  

  400,000 
  „ 
  

  

  

  

  „ 
  „ 
  28... 
  

  

  3 
  

  

  0°-9 
  

  

  

  290,000 
  „ 
  

  

  

  

  „ 
  Dec. 
  4... 
  

  

  2 
  50 
  

  

  2°-5 
  

  

  " 
  

  

  360,000 
  „ 
  

  

  

  

  Cell 
  A. 
  

  

  

  Date. 
  

  

  Duration 
  of 
  

   electrolysis. 
  

  

  Temp. 
  

  

  I 
  

   Potential. 
  Eesistance. 
  

  

  

  

  1907, 
  Nov. 
  10... 
  

  

  2 
  h 
  °0 
  m 
  

  

  5° 
  

  

  -*>11T5 
  volts 
  i 
  20,000 
  ohms 
  

  

  

  

  „ 
  15... 
  

  

  1 
  5 
  

  

  11° 
  

  

  -*114 
  36,000 
  ., 
  

  

  

  „ 
  17... 
  

  

  2 
  30 
  

  

  1°1 
  

  

  115 
  

  

  75,700 
  „ 
  

  

  ) 
  Solutions 
  

  

  ,. 
  „ 
  18... 
  

  

  1 
  37 
  

  

  l°-5 
  

  

  116 
  & 
  230 
  

  

  118,000 
  „ 
  

  

  f 
  interchanged. 
  

  

  „ 
  21... 
  

  

  2 
  30 
  

  

  2°-0 
  

  

  115 
  

  

  178,000 
  „ 
  

  

  

  „ 
  „ 
  23... 
  

  

  1 
  30 
  

  

  2° 
  -5 
  

  

  

  182,000 
  „ 
  

  

  

  „ 
  „ 
  25... 
  

  

  3 
  

  

  3° 
  

  

  j> 
  

  

  230,000 
  „ 
  

  

  

  » 
  29... 
  

  

  2 
  

  

  0°-9 
  

  

  " 
  

  

  276,000 
  ., 
  

  

  

  