﻿the 
  Actinium 
  and 
  Thorium 
  Emanations. 
  

  

  129 
  

  

  proportions 
  of 
  the 
  emanation 
  remain 
  uncondensed 
  at 
  different 
  

   pressures 
  can 
  be 
  derived 
  from 
  those 
  in 
  figs. 
  3 
  and 
  5, 
  and 
  are 
  

  

  80 
  100 
  120 
  140 
  

  

  Pressure 
  in 
  mm. 
  

  

  160 
  180 
  200 
  220 
  240 
  

  

  shown 
  in 
  fig. 
  6 
  for 
  5, 
  25, 
  50, 
  75, 
  and 
  95 
  per 
  cent. 
  A 
  point 
  

   marked 
  with 
  (*) 
  was 
  taken 
  from 
  the 
  paper 
  of 
  Rutherford 
  and 
  

   Soddy 
  t- 
  From 
  these 
  we 
  get 
  : 
  — 
  

  

  Percentage 
  

  

  remaining 
  

  

  uncondensed. 
  

  

  

  5 
  per 
  cent 
  

  

  25 
  per 
  .cent. 
  

  

  50 
  per 
  cent. 
  

  

  75 
  per 
  cent. 
  

  

  95 
  per 
  cent. 
  

  

  Pressure 
  

   in 
  mm. 
  

  

  Act. 
  

  

  i 
  

   Th. 
  ; 
  Act. 
  

  

  Th. 
  

  

  Act, 
  

  

  Th. 
  

  

  Act. 
  

  

  Th. 
  

  

  Act. 
  

  

  Th. 
  

  

  -120-5 
  

   -124-0 
  

   -127-7 
  

   -130-5 
  

   -132-0 
  

   -144-3 
  

  

  90 
  

  

  -147-0 
  

   -148-0 
  

   -149-8 
  

   -151-4 
  

   -152-7 
  

  

  -141-8 
  

  

  -142-7 
  

  

  -1491 
  -144-5 
  

   -150-3 
  -146-0 
  

   -151-4 
  -147-5 
  

  

  -1437 
  

   -1450 
  

   -1462 
  

   -147-5 
  

   -148-1 
  

   -154-2 
  

  

  -137-5 
  

   -138-5 
  

   -140-5 
  

   -142-2 
  

   -1440 
  

   -145-8 
  

   -146-5 
  

   -153-0 
  

  

  —135-3 
  

   -136-4 
  

   -138-3 
  

   -140-5 
  

   -142-2 
  

   -144-0 
  

   -144-8 
  

   -152-8 
  

  

  -132-0 
  

   -133-1 
  

   -135-5 
  

   -137-5 
  

   -139-5 
  

   -141-4 
  

   -142-5 
  

   -149-6 
  

  

  -131-7 
  

   -1345 
  

   -137-0 
  

   -139-5 
  

   -140-5 
  

   -150-5 
  

  

  - 
  122-2 
  

   -123-7 
  

   -126-2 
  

   -128-5 
  

   -130-3 
  

   -1330 
  

   -134-0 
  

   -143-2 
  

  

  100 
  

  

  120 
  

  

  140 
  

  

  160 
  

  

  180 
  

  

  190 
  

  

  760 
  

  

  

  154-0 
  

   154-5 
  

  

  -152-3 
  

  

  -152-8 
  

  

  -148-9 
  

   -149-6 
  

   -155-8 
  

  

  Thus 
  emanations 
  remain 
  partially 
  uncondensed 
  below 
  the 
  

   temperature 
  of 
  the 
  initial 
  condensation 
  over 
  a 
  range 
  of 
  20° 
  C. 
  

   or 
  30° 
  C, 
  according 
  to 
  the 
  pressure. 
  The 
  temperature 
  at 
  

  

  f 
  Loc. 
  cit. 
  

   Phil. 
  Mag. 
  S. 
  6. 
  Vol. 
  16. 
  No. 
  91. 
  July 
  1908, 
  

  

  K 
  

  

  