﻿178 
  

  

  Allen 
  and 
  Lombard 
  — 
  Determination 
  of 
  

  

  :f:5 
  

  

  i! 
  

  

  IfllHIllHttl 
  MKMKfUUf 
  

  

  ^^ttfflfi 
  

  

  1?-:/ 
  

  

  05 
  

  

  1< 
  I 
  

  

  o 
  

  

  o 
  

  

  CM 
  I 
  

  

  

   fa 
  

  

  o 
  

   p— 
  i 
  

  

  -J-3 
  

  

  <D 
  

  

  -i-^ 
  - 
  

  

  rg 
  

  

  

  

  02 
  - 
  

  

  

  P 
  

  

  T3 
  

  

  

  tc 
  

  

  -\--*"--~------ 
  

  

  P 
  

  

  

  

  

  

  J 
  T-'»-~- 
  . 
  

  

  <D 
  

  

  •">"-->-' 
  '■ 
  V 
  

  

  > 
  

  

  j>j?>'i' 
  

  

  o 
  

  

  

  o 
  

  

  

  

  

  Ph 
  

  

  Pm 
  

  

  5*: 
  

   o 
  

  

  r-l 
  

  

  o 
  

   IS 
  

   O 
  

  

  

  t3 
  

  

  p» 
  

  

  * 
  The 
  pipe-covering 
  construction 
  used 
  in 
  furnace 
  1 
  was 
  tried 
  by 
  us 
  at 
  

   first 
  ; 
  but 
  the 
  fire 
  clay 
  construction 
  of 
  furnace 
  2 
  is 
  preferable 
  on 
  account 
  of 
  

   its 
  greater 
  durability. 
  

  

  