﻿46 
  W. 
  P. 
  White 
  — 
  Specific 
  Heat 
  Determination. 
  

  

  tion. 
  The 
  original 
  form 
  (fig. 
  1), 
  shown 
  in 
  several 
  of 
  the 
  

   larger 
  text-books, 
  is 
  simple 
  and 
  convenient, 
  but 
  its 
  nse 
  

   has 
  been 
  limited 
  by 
  the 
  fact 
  that 
  it 
  soon 
  boils 
  dry. 
  This 
  

   difficulty, 
  however, 
  was 
  simply 
  overcome 
  by 
  having 
  a 
  

   condenser 
  connected, 
  which 
  is 
  removed 
  just 
  before 
  the 
  

   drop 
  is 
  made. 
  An 
  electric 
  heating 
  coil 
  with 
  flexible 
  leads 
  

  

  Fig. 
  1. 
  

  

  HTV=^ 
  

  

  Fig. 
  1. 
  Kegnault's 
  portable 
  steam 
  heater 
  for 
  specific 
  heat 
  work. 
  The 
  

   material 
  under 
  investigation 
  in 
  the 
  bottom 
  of 
  the 
  heating 
  chamber, 
  E, 
  is 
  

   discharged 
  by 
  inverting 
  the 
  apparatus. 
  

  

  enabled 
  the 
  apparatus 
  (fig. 
  2) 
  to 
  be 
  moved 
  about 
  without 
  

   danger 
  of 
  premature 
  cooling. 
  The 
  reversed 
  outlet 
  tube 
  

   in 
  our 
  apparatus 
  does 
  not 
  run 
  inside 
  the 
  boiler 
  like 
  d 
  in 
  

   fig. 
  1. 
  I 
  have 
  been 
  unable 
  to 
  see 
  any 
  particular 
  advan- 
  

   tage 
  in 
  having 
  it 
  do 
  so. 
  The 
  apparatus 
  is 
  in 
  some 
  

   respects 
  inferior 
  to 
  our 
  original 
  heater, 
  with 
  automatic 
  

   discharge, 
  described 
  in 
  1910, 
  but 
  is 
  more 
  portable, 
  and 
  

   easier 
  to 
  make 
  and 
  set 
  up. 
  

  

  