﻿398 
  Mr. 
  L. 
  Vegard 
  : 
  Researches 
  upon 
  

  

  Experiment 
  1. 
  

   Apparatus 
  put 
  up 
  Oct. 
  21, 
  1907. 
  

   Resistance 
  of 
  the 
  membrane 
  290,000 
  ohms 
  at 
  3° 
  C. 
  

   Concentration 
  of 
  original 
  solution: 
  170'6 
  gr./l. 
  at 
  16° 
  C. 
  

  

  Observations 
  la. 
  

  

  Date. 
  

  

  u. 
  

  

  t 
  j«. 
  

  

  a. 
  

  

  h 
  m 
  

  

  

  

  

  Oct. 
  28, 
  8 
  p.m. 
  

  

  12-6 
  

  

  

  51-58 
  cm. 
  

  

  „ 
  29, 
  

  

  128 
  

  

  

  21-12 
  „ 
  

  

  „ 
  30, 
  2 
  30 
  „ 
  

  

  12-60 
  

  

  1312 
  

  

  10-40 
  „ 
  

  

  „ 
  30, 
  5 
  45 
  „ 
  

  

  1265 
  

  

  13-04 
  

  

  10-39 
  „ 
  

  

  „ 
  31, 
  5 
  40 
  „ 
  

  

  12-10 
  

  

  12-18 
  

  

  10-13 
  „ 
  

  

  Nov. 
  1, 
  5 
  15 
  „ 
  

  

  11-55 
  

  

  11-50 
  

  

  10-048 
  „ 
  

  

  „ 
  2, 
  3 
  25 
  „ 
  

  

  10-16 
  

  

  10-38 
  

  

  10-076 
  „ 
  

  

  „ 
  3, 
  5 
  10 
  „ 
  

  

  925 
  

  

  9-80 
  

  

  10-000 
  „ 
  

  

  The 
  temperature 
  was 
  lowered 
  to 
  0° 
  and 
  another 
  equilibrium 
  

   examined. 
  

  

  Observations 
  lb. 
  

  

  Date. 
  

  

  to. 
  

  

  tm. 
  

  

  a. 
  

  

  

  h 
  m. 
  

  

  

  

  

  Nov. 
  

  

  4, 
  3 
  30 
  p.m. 
  

  

  o-o 
  

  

  980 
  

  

  1275 
  cm. 
  

  

  

  6, 
  4 
  55 
  ,, 
  

  

  5> 
  

  

  9-96 
  

  

  10-377 
  „ 
  

  

  

  7, 
  3 
  „ 
  

  

  „ 
  

  

  9-90 
  

  

  10-303 
  „ 
  

  

  

  8, 
  9 
  30 
  a.m. 
  

  

  „ 
  

  

  9-77 
  

  

  10-278 
  „ 
  

  

  

  8, 
  2 
  15 
  p.m. 
  

  

  

  984 
  

  

  10-268 
  „ 
  

  

  " 
  

  

  9, 
  10 
  30 
  a.m. 
  

  

  

  9-94 
  

  

  10-226 
  ,. 
  

  

  ^ 
  = 
  temp. 
  in 
  osmometer. 
  £ 
  TO 
  = 
  temp. 
  in 
  manometer. 
  

  

  a=reading 
  o£ 
  manometer. 
  

  

  The 
  solution 
  from 
  the 
  osmometer 
  was 
  tested 
  with 
  Fehling's 
  

   solution, 
  but 
  no 
  measurable 
  inversion 
  was 
  found. 
  The 
  

   solution 
  kept 
  clear 
  after 
  heating 
  for 
  some 
  time 
  to 
  1 
  00°, 
  but 
  

   after 
  some 
  hours 
  a 
  very 
  faint 
  precipitate 
  was 
  observed 
  on 
  

   the 
  bottom 
  of 
  the 
  glass. 
  The 
  same 
  experiment 
  carried 
  out 
  

   with 
  a 
  fresh 
  solution 
  of 
  cane-sugar 
  gave 
  the 
  same 
  result, 
  so 
  

   it 
  should 
  not 
  be 
  due 
  to 
  inversion, 
  but 
  even 
  if 
  it 
  were 
  it 
  was 
  

   too 
  small 
  to 
  be 
  measured. 
  

  

  The 
  testing 
  of 
  the 
  solution 
  with 
  polarized 
  light 
  gave 
  the 
  

   following 
  result: 
  — 
  

  

  Tube. 
  

  

  a 
  . 
  

  

  a. 
  

  

  Short 
  

  

  22° 
  39' 
  

   3-1° 
  7' 
  

  

  21Q 
  41' 
  

  

  32° 
  45' 
  

  

  

  