﻿Ions 
  from 
  Hot 
  Salts. 
  457 
  

  

  sufficiently 
  permanent 
  to 
  make 
  measurements 
  with 
  until 
  

   relatively 
  high 
  temperatures 
  were 
  attained. 
  An 
  aqueous 
  

   solution 
  of 
  the 
  salt 
  was 
  placed 
  on 
  the 
  strip. 
  The 
  results 
  of 
  

   the 
  experiments 
  are 
  collected 
  in 
  the 
  following 
  table 
  : 
  — 
  

  

  2x 
  5-2 
  5-18 
  5-05 
  533 
  5-33 
  

  

  e/m 
  119 
  118 
  112 
  125 
  125 
  

  

  m/H. 
  81-3 
  82-1 
  87'3 
  77"2 
  77*2 
  

  

  0Pt 
  1173° 
  1173° 
  1195° 
  1238° 
  1238° 
  

  

  The 
  values 
  ?n/H 
  are 
  in 
  satisfactory 
  agreement 
  with 
  the 
  

   chemical 
  equivalent 
  of 
  Sr 
  + 
  = 
  87'6, 
  and 
  they 
  confirm 
  the 
  re- 
  

   sults 
  obtained 
  by 
  Davisson 
  (loc. 
  cit.) 
  with 
  other 
  strontium 
  

   sails. 
  

  

  Ferric 
  Chloride. 
  FeCl 
  3 
  . 
  

  

  This 
  substance 
  gave 
  a 
  positive 
  emission 
  at 
  a 
  low 
  tem- 
  

   perature, 
  but 
  it 
  did 
  not 
  last 
  very 
  long. 
  The 
  following- 
  

   values 
  of 
  e/m 
  and 
  m/H 
  were 
  obtained 
  at 
  518° 
  Pt. 
  : 
  — 
  

  

  2x 
  7-0 
  7-10 
  7-05 
  

  

  e/m 
  238 
  245 
  242 
  

  

  m/H 
  40-2 
  39-3 
  39*8 
  

  

  There 
  does 
  not 
  seem 
  to 
  be 
  any 
  satisfactory 
  reason 
  for 
  

   supposing 
  that 
  the 
  above 
  numbers 
  indicate 
  anything 
  except 
  

   the 
  presence 
  of 
  potassium 
  as 
  an 
  impurity. 
  

  

  Manganous 
  Ch 
  7 
  oride. 
  MnCl 
  2 
  . 
  

  

  Measurements 
  with 
  the 
  positive 
  ions 
  emitted 
  by 
  this 
  

   substance 
  were 
  made 
  by 
  the 
  balance 
  method. 
  The 
  structure 
  

   of 
  the 
  ions 
  was 
  evidently 
  changing 
  rather 
  rapidly 
  as 
  the 
  

   experiment 
  progressed. 
  This 
  is 
  shown 
  both 
  by 
  the 
  following 
  

   numbers 
  and 
  by 
  the 
  fact 
  that 
  consistent 
  results 
  could 
  not 
  be 
  

   obtained 
  by 
  the 
  slit 
  method 
  : 
  — 
  

  

  Time 
  (mins.) 
  ... 
  10 
  25 
  35 
  45 
  

  

  e/m 
  284 
  214 
  186 
  136 
  139 
  

  

  m/R 
  339 
  449 
  51-6 
  706 
  691 
  

  

  0pt 
  878° 
  878° 
  906° 
  906° 
  906° 
  

  

  Time 
  (mins.) 
  ... 
  55 
  65 
  70 
  80 
  90 
  

  

  e/m 
  129 
  121 
  211 
  175 
  244 
  

  

  m/B. 
  75 
  79-4 
  45"6 
  55 
  39-2 
  

  

  0pt 
  906° 
  906° 
  962° 
  962° 
  962° 
  

  

  The 
  electric 
  molecular 
  weight 
  increased 
  from 
  33*9 
  to 
  79 
  4 
  

   and 
  then 
  fell 
  back 
  to 
  39 
  '2. 
  The 
  light 
  ions 
  might 
  be 
  Mn 
  ++ 
  , 
  

  

  