﻿the 
  Conductivity 
  of 
  Liquids 
  in 
  Thin 
  Layers. 
  

  

  Alcohol. 
  

   E.M.F.-l 
  Daniell 
  Cell. 
  Temp. 
  = 
  24° 
  C. 
  

  

  255 
  

  

  d. 
  

  

  I. 
  

  

  T 
  = 
  4 
  minutes. 
  

  

  II. 
  

  

  T 
  = 
  l 
  minuto. 
  

  

  Sp. 
  Resistance. 
  

  

  Sp. 
  Resistance. 
  

  

  1*135 
  mm. 
  

   3*015 
  „ 
  

   7*49 
  „ 
  

  

  25i 
  . 
  10 
  13 
  

  

  123 
  

  

  101 
  

  

  162 
  . 
  10 
  13 
  

   135 
  

  

  84 
  

  

  Ether. 
  

   E.M.F. 
  = 
  1 
  Daniell 
  Cell. 
  Temp. 
  = 
  24° 
  C. 
  

  

  d. 
  

  

  T 
  = 
  l 
  minute. 
  

  

  Sp. 
  Resistance. 
  

  

  1*135 
  mm. 
  

   3-015 
  „ 
  

   7*49 
  „ 
  

  

  160 
  . 
  10 
  13 
  

  

  118 
  

  

  111 
  

  

  With 
  water, 
  alcohol, 
  and 
  ether 
  the 
  zinc 
  electrodes 
  were 
  

   used. 
  

  

  The 
  above 
  figures 
  were 
  taken 
  from 
  a 
  large 
  series 
  of 
  readings 
  

   which 
  all 
  agreed 
  in 
  showing 
  that 
  the 
  specific 
  resistance 
  in- 
  

   creased 
  as 
  the 
  thickness 
  of 
  the 
  layer 
  decreased. 
  

  

  Roller 
  concluded, 
  from 
  his 
  experiments, 
  that 
  this 
  effect 
  

   was 
  due 
  neither 
  to 
  " 
  transition 
  resistance 
  " 
  nor 
  to 
  polarization, 
  

   but 
  to 
  dielectric 
  effects. 
  If 
  this 
  were 
  the 
  case 
  it 
  was 
  thought 
  

   that 
  the 
  subject 
  would 
  be 
  well 
  worth 
  further 
  investigation. 
  

  

  Description 
  of 
  Apparatus. 
  

  

  In 
  carrying 
  out 
  the 
  present 
  investigation 
  it 
  was 
  decided, 
  

   after 
  some 
  preliminary 
  experiments, 
  not 
  to 
  use 
  glass 
  separators 
  

   between 
  the 
  plates, 
  for 
  being 
  small 
  they 
  were 
  troublesome 
  to 
  

   work 
  with, 
  and 
  also 
  necessitated 
  the 
  removal 
  of 
  the 
  upper 
  plate 
  

   and 
  disturbance 
  of 
  the 
  liquid 
  when 
  it 
  was 
  required 
  to 
  change 
  

   the 
  thickness 
  of 
  the 
  layer. 
  It 
  was 
  therefore 
  resolved 
  to 
  attach 
  

   the 
  upper 
  plate 
  to 
  a 
  vertical 
  screw, 
  and 
  a 
  piece 
  of 
  apparatus 
  

   was 
  found 
  in 
  the 
  laboratory 
  which, 
  it 
  was 
  thought, 
  would 
  

  

  T 
  2 
  

  

  