﻿658 
  Dr. 
  F. 
  C. 
  Brown 
  on 
  the 
  Kinetic 
  Energy 
  of 
  tlie 
  

  

  potentials 
  on 
  the 
  upper 
  disk. 
  Curve 
  1 
  applies 
  to 
  the 
  lower 
  

   temperature 
  of 
  1000° 
  absolute 
  and 
  curve 
  2 
  applies 
  to 
  the 
  

   observations 
  at 
  1177° 
  absolute, 
  and 
  is 
  plotted 
  on 
  a 
  scale 
  

   50 
  times 
  smaller 
  than 
  is 
  the 
  other 
  curve. 
  That 
  is, 
  the 
  

   absolute 
  magnitude 
  of 
  the 
  current 
  is 
  about 
  80 
  times 
  smaller 
  

  

  Positive 
  Ionization 
  from 
  Gold. 
  

  

  6^ 
  

  

  

  a 
  J 
  

  

  ^ 
  o 
  

  

  is 
  

  

  1— 
  1 
  

  

  Electrometer 
  Deflexions, 
  

   mm. 
  

  

  1 
  

  

  <D 
  

  

  1 
  

  

  g 
  

   1 
  

  

  Heating 
  current. 
  

   Direct. 
  Eeversed. 
  

  

  '0001 
  

  

  •007 
  

  

  /973 
  

  

  lioao 
  

  

  

  

  0-1 
  

   0-2 
  

   0-3 
  

   0-4 
  

  

  5 
  sec. 
  11, 
  9, 
  9, 
  10-5 
  9, 
  9, 
  11, 
  10 
  

   14, 
  17 
  17, 
  15 
  

  

  10 
  sec. 
  6-4, 
  6-5, 
  6-8 
  6-0, 
  7-0, 
  6^2 
  

  

  30 
  sec. 
  8-0, 
  7-8, 
  8-5 
  8-0, 
  6-2, 
  6-8 
  

  

  30 
  sec. 
  5, 
  3-8, 
  G-0, 
  4-0 
  4-3, 
  4-0, 
  5-0 
  

  

  30 
  sec. 
  3-5, 
  3-7, 
  3-1 
  2-5, 
  30, 
  2^0 
  

  

  99 
  

  

  58 
  

  

  33 
  

   13 
  

  

  8 
  

   5 
  

  

  96 
  

   55 
  

  

  30 
  

  

  10 
  

  

  5 
  

  

  2 
  

  

  •02 
  

   •05 
  

  

  •113 
  

  

  •216 
  

  

  •31 
  

  

  •40 
  

  

  o 
  

   i—t 
  

  

  X 
  

  

  •01 
  

  

  •01 
  

  

  jimn 
  

  

  11190 
  

  

  

  

  0^1 
  

   0-2 
  

   0-3 
  

   0-4 
  

   0^5 
  

  

  5 
  sec. 
  6, 
  6-5 
  7-0, 
  o-5 
  

   10 
  sec. 
  5-0 
  5^7 
  

   10 
  sec. 
  2-2 
  2-4 
  

   30 
  sec. 
  3-2 
  2-7 
  

   30 
  sec. 
  1-0 
  1^5 
  

   30 
  sec. 
  0-6 
  0^9 
  

  

  126 
  

   53 
  

   23 
  

   9^6 
  

   4^0 
  

   2^0 
  

  

  126 
  

   53 
  

   23 
  

   9-6 
  

   40 
  

   20 
  

  

  •013 
  

   11 
  

  

  •3 
  

   •4 
  

   •5 
  

  

  O 
  

  

  X 
  

  

  OS 
  

   CO 
  

  

  Mean 
  gas 
  constant 
  4*0 
  X 
  10^. 
  

  

  at 
  1000° 
  than 
  it 
  is 
  at 
  1177°. 
  This 
  is 
  not 
  made 
  clear 
  in 
  the 
  

   table. 
  The 
  curves 
  1 
  b 
  and 
  2 
  b 
  show 
  the 
  corresponding- 
  

   logarithms 
  of 
  the 
  current 
  at 
  the 
  different 
  potentials. 
  From 
  

   these 
  curves 
  and 
  the 
  other 
  data 
  the 
  value 
  of 
  the 
  

   constant 
  R 
  is 
  easily 
  calculated 
  from 
  the 
  equation 
  

  

  gas 
  

  

  R 
  

  

  leY 
  

  

  ^log/f 
  

  

  For 
  

   and 
  for 
  

  

  d 
  = 
  1000° 
  ab. 
  R 
  = 
  4-2 
  X 
  10^ 
  

   6 
  = 
  1177° 
  ab. 
  R 
  = 
  3-9 
  X 
  10^ 
  

  

  More 
  reliance 
  is 
  placed 
  upon 
  the 
  latter 
  value, 
  because 
  

   the 
  current 
  was 
  80 
  times 
  larger 
  and 
  was 
  therefore 
  capable 
  of 
  

   more 
  accurate 
  measurement. 
  

  

  