﻿550 
  Van 
  Name 
  and 
  Hill 
  — 
  Alcohol 
  and 
  Cane 
  Sugar. 
  

  

  merits 
  and 
  from 
  those 
  of 
  Lenz.-* 
  For 
  the 
  same 
  non-electrolyte 
  

   the 
  constant 
  a 
  varies 
  but 
  slightly 
  with 
  the 
  nature 
  of 
  the 
  dif- 
  

   fusing 
  substance 
  so 
  long 
  as 
  the 
  latter 
  is 
  an 
  electrolyte 
  of 
  simple 
  

   structure. 
  The 
  value 
  0*124 
  for 
  alcohol 
  is 
  the 
  average 
  of 
  fairly 
  

   concordant 
  determinations 
  with 
  sodium 
  chloride, 
  sodium 
  hydrox- 
  

   ide, 
  sodium 
  iodide, 
  potassium 
  iodide, 
  and 
  cadmium 
  iodide, 
  and 
  

   is 
  therefore 
  probably 
  near 
  the 
  correct 
  value 
  for 
  iodine 
  diffusing 
  

  

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  - 
  — 
  

  

  as 
  KI 
  3 
  . 
  The 
  value 
  0*613 
  for 
  sugar 
  is 
  derived 
  from 
  measure- 
  

   ments 
  with 
  sodium 
  chloride 
  and 
  ammonium 
  hydroxide 
  as 
  the 
  

   diffusing 
  substances. 
  In 
  the 
  absence 
  of 
  any 
  published 
  data 
  

   concerning 
  measurements 
  of 
  this 
  kind 
  with 
  iodine 
  itself, 
  these 
  

   values 
  of 
  a 
  may 
  be 
  regarded 
  as 
  the 
  most 
  probable. 
  

  

  A 
  graphical 
  comparison 
  of 
  the 
  calculated 
  with 
  the 
  measured 
  

   constants 
  is 
  given 
  by 
  figs. 
  1 
  and 
  2. 
  It 
  is 
  evident 
  that 
  the 
  

   measured 
  values 
  give 
  very 
  regular 
  curves 
  but 
  are 
  lower 
  through- 
  

   out, 
  both 
  for 
  alcohol 
  and 
  cane 
  sugar, 
  than 
  the 
  calculated 
  values. 
  

   If, 
  on 
  the 
  other 
  hand, 
  the 
  constant 
  a 
  is 
  calculated 
  from 
  the 
  

   * 
  Memoires 
  de 
  l'Acad. 
  de 
  St. 
  Petersbourg 
  (7), 
  xxx, 
  57, 
  1882. 
  

  

  