﻿Energy 
  of 
  Negative 
  Electrons 
  emitted 
  by 
  Hot 
  Bodies. 
  

   Negative 
  Ionization. 
  

  

  367 
  

  

  

  

  

  Electrometer 
  Readings, 
  

  

  

  

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  •22 
  

  

  Resistance 
  7570, 
  temperature 
  1556 
  absolute 
  scale. 
  Gas 
  constant 
  4"lxl0\ 
  

  

  A 
  series 
  of 
  observations 
  similar 
  to 
  those 
  in 
  the 
  table 
  have 
  

   been 
  plotted 
  in 
  fig. 
  4, 
  so 
  as 
  to 
  exhibit 
  the 
  potential 
  to 
  which 
  

  

  Fig. 
  4. 
  

  

  Time, 
  mihutcs 
  

  

  the 
  upper 
  plate 
  charges 
  as 
  a 
  function 
  of 
  the 
  time. 
  1 
  [ 
  The 
  

   general 
  form 
  of 
  this 
  curve 
  is 
  in 
  agreement 
  with 
  the 
  equation 
  

   (12) 
  which 
  was 
  deduced 
  theoretically. 
  

  

  Fig. 
  5 
  exhibits 
  the 
  current 
  to 
  the 
  upper 
  plate 
  as 
  a 
  function 
  

   of 
  the 
  potential-difference 
  tending 
  to 
  stop 
  it. 
  The 
  points 
  

  

  