﻿296 
  Dr. 
  H. 
  L. 
  Bronson 
  : 
  Relative 
  Activity 
  of 
  Emanation 
  

  

  "38 
  (see 
  Table 
  I.), 
  or 
  almost 
  exactly 
  one 
  quarter 
  of 
  the 
  

   calculated 
  ratio. 
  

  

  A 
  complete 
  summary 
  o£ 
  the 
  measurements 
  and 
  calculations 
  

   for 
  thorium 
  and 
  actinium 
  is 
  given 
  in 
  Table 
  III. 
  

  

  Table 
  III. 
  

  

  Products. 
  

  

  II. 
  

  

  III. 
  

  

  Vessel. 
  

  

  Max. 
  

  

  range 
  

   in 
  air. 
  

  

  18x40 
  

  

  5-5 
  

  

  on 
  central 
  

   electrode. 
  

  

  50 
  

  

  8-6 
  

  

  18x40 
  

  

  5-5 
  

  

  on 
  cyl. 
  

   surface. 
  

  

  5-0 
  

  

  8-6 
  

  

  3-6x40 
  

  

  5-5 
  

  

  on 
  central 
  

   electrode. 
  

  

  36x40 
  

  

  on 
  cyl. 
  

   surface. 
  

  

  18x40 
  

   on 
  central 
  

   electrode. 
  

  

  18x40 
  

   on 
  cyl. 
  

   surface. 
  

  

  36x40 
  

  

  on 
  central 
  

   electrode. 
  

  

  3-6x40 
  

   on 
  cyl. 
  

  

  surface. 
  

  

  IV 
  

  

  V. 
  

  

  50 
  

  

  8-6 
  

  

  5-5 
  

   50 
  

  

  5-8 
  

   5-5 
  

  

  5-8 
  

   5-5 
  

  

  5-8 
  

   5-5 
  

  

  5-8 
  

   5-5 
  

  

  Mean 
  free 
  ; 
  Batio 
  of 
  paths, 
  

   path 
  in 
  Active 
  deposit 
  . 
  

   Emanation. 
  

  

  1-51 
  

  

  4-5 
  ^ 
  

   5-0 
  | 
  

  

  "5- 
  y 
  

  

  8j6 
  J 
  

   2 
  ' 
  

  

  4-5 
  ) 
  

   4-65 
  | 
  

  

  "2 
  y 
  

  

  775 
  I 
  

   2 
  ' 
  

  

  2-68^1 
  

   314 
  | 
  

  

  -* 
  y 
  

  

  3-88 
  I 
  

   2 
  ) 
  

  

  2-68 
  "| 
  

   3-68 
  | 
  

  

  t 
  y 
  

  

  4-65 
  I 
  

   2 
  / 
  

  

  4-8 
  

   5j5 
  

  

  II 
  

  

  4- 
  

  

  5-: 
  

  

  ~2~ 
  ) 
  

  

  2-73 
  

   326 
  

  

  2 
  

  

  2-73 
  

  

  3-87 
  

  

  1-38 
  

  

  1-31 
  

  

  1-56 
  

  

  •57 
  

  

  •53 
  

  

  •60 
  

  

  VI. 
  

  

  Cal. 
  Ratio 
  of 
  

   ionizations. 
  

  

  Active 
  deposit. 
  

   Emanation. 
  

  

  1-48 
  

  

  1-33 
  

  

  1-28 
  

  

  1-56 
  

  

  •61 
  

  

  •57 
  

  

  •65 
  

  

  •81 
  

  

  VII. 
  

  

  Mea- 
  

   sui*ed 
  

   ratio 
  of 
  

   ioniza- 
  

   tions. 
  

  

  •38 
  

  

  ■34 
  

  

  •34 
  

  

  •40 
  

  

  •31 
  

  

  •28 
  

  

  •33 
  

  

  •41 
  

  

  