﻿608 
  

  

  Mr. 
  J. 
  Satterly 
  on 
  the 
  Amount 
  of 
  

  

  Table 
  VIII. 
  

  

  First 
  Set 
  of 
  Results 
  with 
  the 
  Condenser, 
  

  

  Drying 
  Agent 
  Calcium 
  Chloride. 
  

  

  Date. 
  

  

  March. 
  

   Mon. 
  23... 
  

  

  Tues. 
  24... 
  

  

  Wed. 
  25... 
  

   Tburs. 
  26 
  . 
  

  

  Sim. 
  29 
  ... 
  

   Mon. 
  30... 
  

  

  Tues. 
  31... 
  

  

  April. 
  

   Thurs. 
  2 
  . 
  

  

  Fri.3 
  

  

  Sat. 
  4 
  

  

  Tues. 
  7 
  ... 
  

  

  Wed. 
  8 
  ... 
  

  

  Thurs. 
  9... 
  

  

  Weather 
  and 
  

   Barometer. 
  

  

  Source 
  

  

  of 
  

   Emana- 
  

   tion. 
  

  

  Fine 
  ; 
  762, 
  steady. 
  Air. 
  

  

  Wet; 
  763, 
  rising. 
  

   „ 
  765, 
  steady. 
  1 
  

  

  ! 
  

  

  Rained. 
  

   Windy, 
  Fine 
  ; 
  

  

  760, 
  falling. 
  

   Windy 
  ; 
  fine, 
  

  

  756, 
  steady. 
  

  

  Fine 
  ; 
  762, 
  falling. 
  

  

  Windy, 
  hail, 
  rain 
  ; 
  

   75S, 
  steady. 
  

   Cold, 
  hail 
  ; 
  760, 
  

  

  rising. 
  

   Cloudless, 
  windy 
  ; 
  

   773, 
  steady. 
  

   Cloudless; 
  769, 
  

   falling. 
  

   Fine; 
  766, 
  falling. 
  

  

  Air 
  

  

  + 
  Sol. 
  

  

  Air. 
  

  

  Air. 
  

  

  Air 
  * 
  

  

  Air 
  

   + 
  Sol.* 
  

  

  Air 
  

   4- 
  Sol* 
  

  

  Air. 
  

  

  Air. 
  

  

  Air 
  

  

  + 
  Sol. 
  

   Air. 
  

  

  Time 
  of 
  

   passing 
  the 
  

   Air 
  Stream. 
  

  

  Volume 
  

   I 
  of 
  air 
  

   wassed. 
  

  

  r.M. 
  

  

  3.S-5.45 
  

  

  157 
  m. 
  

  

  3.45-5.45 
  

  

  120 
  m. 
  

  

  3.11-5.45 
  

   184 
  m. 
  

  

  2.47-5.32 
  

  

  165 
  m. 
  

   2.32-5.32 
  

  

  180 
  m. 
  

  

  2.41-5.14 
  

  

  153 
  m. 
  

   2.39-5.11 
  

  

  153 
  m. 
  

   9.30 
  A.M.-12.4 
  

  

  154 
  m. 
  

   12.43-5.11 
  

  

  268 
  m. 
  

   1.11-5.11 
  

  

  240 
  m. 
  

   12.55-5.7 
  

  

  252 
  m. 
  

  

  litres. 
  

  

  78 
  

  

  56 
  

  

  82 
  

   88 
  

  

  67 
  

  

  70 
  

  

  77 
  

  

  133 
  

  

  120 
  

  

  109 
  

  

  Total 
  

   imme- 
  

   diate 
  

   leak. 
  

  

  1-8 
  

  

  45 
  

  

  7-7 
  

  

  6-2 
  

   •0-1-9+ 
  

   0-2-Ct 
  

  

  8-8 
  

  

  1-9 
  

  

  Air 
  

   Leak. 
  

  

  Leak 
  due 
  to 
  

   the 
  Emanation 
  

  

  Imme- 
  

   diately 
  

  

  3 
  hrs. 
  

   after- 
  

   wards. 
  

  

  1-7 
  

  

  1 
  

  

  •3 
  

  

  1-2 
  

  

  33 
  

  

  50 
  

  

  1-1 
  

  

  1-7 
  

  

  23 
  

  

  1-0 
  

  

  1-1 
  

  

  1-6 
  

  

  10 
  

  

  •8 
  

  

  

  1-5 
  

  

  62 
  

  

  

  1-2 
  

  

  50 
  

  

  

  1-2 
  

  

  1-S--7 
  

  

  •2t 
  

  

  1-4 
  

  

  5-6-6 
  

  

  •3t 
  

  

  1-6 
  

  

  7-2 
  

  

  109 
  

  

  1-7 
  

  

  •2 
  

  

  •3 
  

  

  * 
  Denotes 
  that 
  charcoal 
  experiments 
  were 
  made 
  at 
  the 
  same 
  time. 
  

  

  t 
  These 
  results 
  are 
  curious. 
  The 
  initial 
  leak 
  due 
  to 
  the 
  emanation 
  was 
  

   high, 
  as 
  shown 
  by 
  the 
  number 
  first 
  given. 
  It 
  rapidly 
  decreased 
  and 
  remained 
  

   approximately 
  steady 
  about 
  30 
  minutes 
  afterwards 
  at 
  the 
  last 
  number 
  given. 
  

   Three 
  hours 
  after 
  it 
  was 
  small. 
  Evidently 
  the 
  main 
  part 
  of 
  the 
  initial 
  leak 
  

   was 
  not 
  due 
  to 
  radium 
  emanation. 
  The 
  decay 
  was 
  not 
  exponential, 
  and 
  I 
  

   have 
  not 
  yet 
  fathomed 
  its 
  cause. 
  It 
  could 
  not 
  be 
  due 
  to 
  any 
  thorium 
  emanation 
  

   condensed 
  at 
  the 
  same 
  time 
  as 
  the 
  radium 
  emanation 
  was 
  condensed, 
  for 
  this 
  

   would 
  have 
  long 
  since 
  decayed 
  to 
  an 
  indefinitely 
  small 
  quantity. 
  

  

  This 
  set 
  of 
  readings 
  was 
  taken 
  before 
  the 
  Easter 
  Vacation. 
  

   Summarising 
  the 
  above 
  we 
  get 
  Table 
  IX. 
  in 
  which 
  are 
  

   tabulated 
  the 
  leaks, 
  due 
  to 
  the 
  emanation 
  (1) 
  from 
  70 
  litres 
  

   of 
  air, 
  and 
  (2) 
  from 
  70 
  litres 
  of 
  air 
  and 
  2J 
  hours 
  of 
  the 
  

   solution 
  at 
  the 
  dates 
  given. 
  

  

  