﻿10 
  22 
  Dr. 
  R. 
  Polil 
  and 
  Dr. 
  P. 
  Pringsheim 
  on 
  the 
  

  

  Table 
  I. 
  

  

  Total 
  charge 
  of 
  the 
  electrons 
  liberated 
  by 
  1 
  cal. 
  of 
  incident 
  light 
  

  

  10- 
  4 
  cod. 
  

  

  Wave- 
  

  

  Fresh 
  

  

  20 
  min. 
  

  

  45 
  min. 
  

  

  110 
  min. 
  

  

  Surface 
  

  

  100 
  min. 
  

  

  later. 
  

  

  length 
  

  

  surface 
  

  

  after 
  pre- 
  

  

  after 
  pre- 
  

  

  after 
  pre- 
  

  

  renewed 
  by 
  

  

  ' 
  /'• 
  

  

  of 
  Ca. 
  

  

  paration. 
  

  

  paration. 
  

  

  paration. 
  

  

  shaking. 
  

  

  230 
  

  

  3-63 
  

  

  5-65 
  

  

  62 
  

  

  6-6 
  

  

  4-43 
  

  

  7-2! 
  

  

  254 
  

  

  2-61 
  

  

  4-1 
  

  

  4-37 
  

  

  5-07 
  

  

  2-58 
  

  

  514 
  

  

  313 
  

  

  0-336 
  

  

  1-79 
  

  

  3-12 
  

  

  3-6 
  

  

  0-6 
  

  

  3-84 
  

  

  305 
  

  

  

  

  115 
  

  

  2-48 
  

  

  31 
  

  

  

  

  3-26 
  

  

  405 
  

  

  — 
  

  

  0-63 
  

  

  1-8 
  

  

  2-39 
  

  

  — 
  

  

  2-64 
  

  

  436 
  

  

  — 
  

  

  0-43 
  

  

  1-58 
  

  

  1-96 
  

  

  — 
  

  

  2-3 
  

  

  546 
  

  

  — 
  

  

  

  

  041 
  

  

  0-63 
  

  

  — 
  

  

  0-72 
  

  

  Nr 
  

  

  3889-3892 
  

  

  3893-3899 
  

  

  3900-3906 
  

  

  3909-3915 
  

  

  3923-3027 
  

  

  3934-3940 
  

  

  Finr. 
  2. 
  

  

  io- 
  < 
  

  

  Coulomb 
  

   C 
  alone 
  

  

  

  

  a 
  

  

  ?-//£ 
  a 
  

  

  FRESH 
  »5 
  

  

  WO 
  MIN. 
  

  

  1 
  

   UOY 
  

  

  

  1 
  \ 
  

   in 
  

  

  

  

  

  X 
  

  

  1 
  

  

  'UffFACE. 
  

   LATER. 
  

  

  

  

  V 
  

  

  

  

  ? 
  

  

  © 
  

  

  SURFACE 
  ffENEWE 
  

   BY 
  SHAKING 
  . 
  

  

  100 
  MIN. 
  LATEff. 
  

  

  O 
  

  

  5 
  i 
  

  

  \ 
  

  

  

  

  

  

  

  

  ^ 
  A 
  

  

  ,>s 
  

  

  

  

  

  

  

  

  

  \\ 
  

  

  

  

  .© 
  

  

  

  

  II 
  

  

  \ 
  

  

  

  

  

  

  

  

  

  \ 
  

  

  S[ 
  

  

  

  1 
  

  

  ^ 
  

  

  V 
  ^- 
  

  

  200 
  

  

  M 
  250 
  300 
  

  

  Wai/e 
  length 
  

  

  400 
  

  

  500 
  

  

  coo 
  

  

  actual 
  measurements 
  was 
  highly 
  evacuated) 
  has 
  as 
  yet 
  

   shown 
  no 
  effect 
  except, 
  as 
  in 
  the 
  case 
  of 
  2 
  , 
  when 
  the 
  

   surface 
  was 
  attacked 
  and 
  rendered 
  entirely 
  insensitive, 
  

   one 
  has 
  to 
  do 
  with 
  an 
  effect 
  which 
  is 
  

  

  Here, 
  therefore; 
  

  

  

  