﻿Phil. 
  Mag. 
  Ser. 
  6, 
  Vol. 
  26, 
  PI. 
  XIX. 
  

  

  Fig. 
  7. 
  — 
  Analysis 
  of 
  y 
  radiation 
  from 
  radioactiniuni. 
  

  

  I00< 
  

   90 
  

  

  80 
  

   70 
  

   60 
  

   SO 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  V, 
  

  

  *N^ 
  

  

  

  

  

  

  

  

  — 
  

  

  — 
  

  

  

  

  

  — 
  ---^rS^; 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  2 
  A 
  -6 
  -8 
  1-0 
  VI 
  1-4 
  1-6 
  

  

  Thickness 
  in 
  mms. 
  of 
  Aluminium 
  

  

  Fig. 
  8. 
  — 
  ■ 
  Penetrating 
  y 
  radiation 
  from 
  radioactinium. 
  

  

  