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  Note. 
  — 
  CuZnZn 
  •00131 
  indicates: 
  — 
  Copper 
  radiation 
  after 
  transmission 
  

   through 
  Zn 
  is 
  absorbed 
  by 
  Zn 
  -00131 
  cm. 
  thick 
  to 
  extent 
  shown 
  by 
  

   ordinates. 
  

  

  Table 
  III. 
  

   Radiation 
  from 
  Copper 
  (thick 
  sheet). 
  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  Percentage 
  Absorption 
  

  

  byAlof 
  

  

  Primary 
  Radiation 
  

  

  previous 
  to 
  incidence 
  

  

  on 
  Cn 
  radiator. 
  

  

  Percentage 
  Absorption 
  

   of 
  Primary 
  Rays 
  

   by 
  Al 
  (-0208 
  cm.) 
  

  

  after 
  absorption 
  given 
  

   in 
  column 
  I. 
  

  

  Percentage 
  Absorption 
  

   of 
  Secondary 
  Rays 
  

   by 
  Al 
  (0101 
  cm.). 
  

  

  o 
  

  

  

  58 
  

  

  52 
  

  

  •• 
  

  

  58-6 
  

  

  

  

  52 
  

  

  58-3 
  

  

  77 
  

  

  27 
  

  

  58-8 
  

  

  

  

  51 
  

  

  58-4 
  

  

  91 
  

  

  18 
  

  

  58-1 
  

  

  

  

  51 
  

  

  58-8 
  

  

  