﻿Osmosis 
  and 
  Osmotic 
  Pressure, 
  

  

  405 
  

  

  some 
  water. 
  To 
  make 
  sure 
  that 
  the 
  osmometer 
  had 
  assumed 
  

   this 
  temperature, 
  it 
  was 
  left 
  to 
  itself 
  for 
  about 
  H 
  hours 
  before 
  

   the 
  observations 
  began. 
  

  

  The 
  next 
  day 
  the 
  velocities 
  were 
  measured 
  in 
  the 
  same 
  

   manner 
  as 
  on 
  the 
  first 
  day 
  for 
  values 
  of 
  it 
  going 
  from 
  about 
  

   80 
  atm. 
  to 
  0. 
  

  

  During 
  the 
  nights 
  the 
  osmometer 
  was 
  placed 
  under 
  a 
  

   pressure 
  near 
  to 
  the 
  equilibrium 
  pressure. 
  

  

  The 
  results 
  are 
  given 
  in 
  the 
  following 
  table 
  and 
  graphically 
  

   represented 
  by 
  PI. 
  IX. 
  fig. 
  11 
  (curves 
  II. 
  and 
  III.) 
  and 
  fig. 
  13. 
  

  

  March 
  18. 
  

  

  March 
  19. 
  

  

  March 
  20. 
  

  

  i' 
  o 
  =ll°-40. 
  

  

  to 
  = 
  ll 
  

  

  °-3C. 
  

  

  fo=ll°-6C. 
  

  

  Fig. 
  11, 
  Curve 
  II. 
  

  

  Fig. 
  13, 
  

  

  Curve 
  I. 
  

  

  Fig. 
  13, 
  Curve 
  III. 
  

  

  -. 
  

  

  1 
  

   X'. 
  

  

  7T. 
  

  

  x/ 
  

  

  TV. 
  

  

  X'. 
  

  

  at 
  in. 
  

  

  in 
  ru. 
  /hour. 
  

  

  atm. 
  

  

  mm./hour. 
  

  

  atm. 
  

  

  mm./hour. 
  

  

  005 
  

  

  -250 
  

  

  27-89 
  

  

  - 
  45 
  

  

  22-79 
  

  

  - 
  37-2 
  

  

  1-54 
  

  

  -194 
  

  

  30-63 
  

  

  + 
  11-4 
  

  

  27-10 
  

  

  - 
  9-2 
  

  

  3-43 
  

  

  -163 
  

  

  29-27 
  

  

  + 
  5-0 
  

  

  28-40 
  

  

  - 
  1-2 
  

  

  6-16 
  

  

  -146 
  

  

  28-53 
  

  

  + 
  o-o 
  

  

  29-88 
  

  

  + 
  10-4 
  

  

  11-22 
  

  

  -125 
  

  

  28-83 
  

  

  + 
  1-5 
  

  

  32-77 
  

  

  + 
  24-0 
  

  

  17-01 
  

  

  - 
  76-2 
  

  

  

  

  38-15 
  

  

  + 
  70-0 
  

  

  22-40 
  

  

  - 
  47-7 
  

  

  

  

  28-70 
  

  

  - 
  0-6 
  

  

  26-95 
  

  

  - 
  204 
  

  

  ^=0 
  

  

  °C. 
  

  

  45-53 
  

  

  +135 
  

  

  29 
  09 
  

  

  + 
  1-5 
  

  

  Fig. 
  13, 
  l 
  

  

  Durve 
  II. 
  

  

  52-68 
  

  

  +208 
  

  

  31 
  -HO 
  

   3323 
  

  

  + 
  21-7 
  

   + 
  32-2 
  

  

  

  

  56-47 
  

   60-86 
  

  

  +224 
  

   +265 
  

  

  

  

  36-00 
  

  

  4- 
  51-6 
  

  

  27-78 
  

  

  - 
  3-7 
  

  

  64-22 
  

  

  +303 
  

  

  41-33 
  

  

  + 
  70-9 
  

  

  2902 
  

  

  + 
  o-i 
  

  

  68-01 
  +335 
  

  

  42-87 
  

  

  4-103 
  

  

  30-40 
  

  

  + 
  4-3 
  

  

  74-52 
  

  

  +413 
  

  

  5095 
  

  

  + 
  170 
  

  

  32-52 
  

   36-18 
  

  

  +14-5 
  

  

  79-66 
  

  

  +480 
  

  

  53-86 
  

  

  4-216 
  

  

  + 
  30-7 
  

  

  510 
  

  

  -136 
  

  

  57-89 
  

  

  4-268 
  

  

  26-52 
  

  

  - 
  6-3 
  

  

  2-51 
  

  

  -140 
  

  

  60-88 
  

  

  +298 
  

  

  

  

  0-85 
  

  

  -141 
  

  

  6424 
  

  

  +323 
  

  

  

  

  000 
  

  

  -148 
  

  

  68-11 
  

  

  4-336 
  

  

  

  

  

  

  72-2l> 
  

  

  +409 
  

  

  

  

  

  

  74-53 
  

  

  +448 
  

  

  

  

  

  

  There 
  was 
  no 
  detectable 
  change 
  in 
  the 
  angle 
  of 
  rotation. 
  

  

  © 
  © 
  

  

  The 
  water 
  in 
  the 
  cell 
  was 
  analysed 
  very 
  carefully. 
  The 
  

   mean 
  of 
  a 
  number 
  of 
  readings 
  gave 
  an 
  angle 
  of 
  0'*1. 
  

  

  Experiment 
  III. 
  

  

  This 
  experiment 
  is 
  a 
  repetition 
  of 
  the 
  preceding 
  experi- 
  

   ment. 
  The 
  same 
  method 
  and 
  the 
  same 
  concentration 
  were 
  

   used. 
  The 
  resistance 
  of 
  the 
  cell, 
  however, 
  is 
  greater, 
  being 
  

   now 
  360,000 
  ohms 
  at 
  1°"2. 
  The 
  analysis 
  after 
  the 
  experi- 
  

   ment 
  gave 
  neither 
  leak 
  nor 
  change 
  in 
  concentration. 
  

  

  