﻿Ions 
  from 
  Hot 
  Salts. 
  

  

  465 
  

  

  temperature 
  (534° 
  C.) 
  . 
  In 
  this 
  case 
  also 
  there 
  is 
  no 
  distinct 
  

   difference 
  between 
  the 
  two 
  currents 
  at 
  first 
  ; 
  but 
  after 
  the 
  

   maximum 
  is 
  passed, 
  the 
  current 
  with 
  the 
  magnet 
  on 
  is 
  

   distinctly 
  smaller 
  than 
  that 
  with 
  it 
  off. 
  The 
  actual 
  current 
  

   carried 
  by 
  electrons 
  does 
  not 
  vary 
  much 
  after 
  the 
  first 
  

   fifteen 
  minutes. 
  As 
  the 
  total 
  current 
  is 
  then 
  diminishing, 
  

   the 
  proportion 
  of 
  it 
  which 
  is 
  carried 
  by 
  electrons 
  continuously 
  

   increases 
  with 
  lapse 
  of 
  time. 
  

  

  Fig. 
  5 
  shows 
  the 
  results 
  obtained 
  at 
  a 
  still 
  higher 
  tempe- 
  

   rature 
  (654° 
  C). 
  A 
  much 
  larger 
  proportion 
  of 
  the 
  current 
  

  

  Fisr. 
  5. 
  

  

  K)0r 
  

  

  300 
  

  

  §1 
  

  

  200 
  

  

  I- 
  

  

  (00 
  

  

  o 
  Initial 
  We/ivy 
  /oWs 
  o.nl 
  y. 
  

   ®\, 
  f 
  /nal 
  Heavy 
  /ows 
  o/viy. 
  

   x 
  \/-/E/ivy 
  Ions 
  + 
  fAEcr/ro/v, 
  

  

  4-5 
  60 
  75 
  

  

  T/me 
  //v 
  Minutes. 
  

  

  is 
  now 
  carried 
  by 
  electrons. 
  The 
  rate 
  of 
  decay 
  of 
  both 
  parts 
  

   of 
  the 
  current 
  after 
  passing 
  the 
  maximum 
  is 
  much 
  smaller 
  

   than 
  that 
  obtained 
  at 
  the 
  lower 
  temperatures. 
  The 
  current 
  

   carried 
  by 
  heavy 
  ions 
  rises 
  less 
  rapidly 
  at 
  first 
  than 
  that 
  

   carried 
  by 
  electrons, 
  and 
  the 
  maximum 
  occurs 
  at 
  a 
  later 
  time. 
  

   At 
  this 
  temperature, 
  and 
  in 
  other 
  cases 
  where 
  a 
  considerable 
  

   proportion 
  of 
  the 
  total 
  current 
  was 
  carried 
  by 
  electrons, 
  it 
  

   was 
  found 
  that 
  the 
  current 
  immediately 
  after 
  the 
  magnetic 
  

   field 
  was 
  switched 
  on 
  was 
  greater 
  than 
  a 
  few 
  minutes 
  later. 
  

   In 
  fig. 
  5 
  this 
  initial 
  current 
  is 
  shown 
  thus 
  : 
  (g) 
  ; 
  the 
  steady 
  

   value 
  to 
  which 
  it 
  settled 
  down 
  after 
  a 
  few 
  minutes 
  being- 
  

   denoted 
  as 
  before 
  by 
  o. 
  The 
  way 
  in 
  which 
  the 
  current 
  

   carried 
  by 
  the 
  heavy 
  ions 
  varied 
  with 
  the 
  time 
  after 
  the 
  

   magnet 
  had 
  been 
  turned 
  on 
  is 
  indicated 
  by 
  the 
  following- 
  

   numbers, 
  which 
  were 
  obtained 
  in 
  a 
  particular 
  instance 
  : 
  — 
  

  

  Time 
  from 
  switching 
  magnet 
  on. 
  . 
  1 
  2 
  3 
  4 
  5 
  

  

  (minutes). 
  

   Current 
  carried 
  by 
  heavy 
  ions. 
  ... 
  90 
  82 
  78-5 
  76 
  75 
  74-2 
  

   (l 
  = 
  l-32xl0- 
  9 
  amp.). 
  

  

  This 
  phenomenon 
  seems 
  to 
  indicate 
  that 
  some 
  of 
  the 
  

   material 
  which 
  forms 
  the 
  heavy 
  ions 
  tends 
  to 
  accumulate, 
  or 
  

  

  