﻿168 
  Ilolhorn 
  and 
  Day 
  — 
  Gas 
  Thermometer 
  at 
  

  

  1. 
  Gas 
  Thermometer. 
  

  

  For 
  the 
  experiments 
  with 
  the 
  gas 
  thermometer 
  the 
  "con- 
  

   stant 
  vohime" 
  principle 
  only 
  was 
  used, 
  in 
  order 
  that 
  a 
  nearly 
  

   uniform 
  sensitiveness 
  might 
  be 
  maintained 
  throughout 
  the 
  

  

  V-;- 
  - 
  

  

  ^■^ 
  

  

  

  1 
  

  

  :M1M 
  

  

  

  

  entire 
  range 
  of 
  temperatures. 
  As 
  manometer 
  we 
  had 
  at 
  lirst 
  

   at 
  our 
  disposal 
  an 
  apparatus 
  constructed 
  by 
  Fuess 
  (Berlin) 
  and 
  

   used 
  and 
  described 
  by 
  Wiebe 
  and 
  Bottcher,"^" 
  a 
  few 
  necessarj^ 
  

   changes 
  being 
  made 
  to 
  adapt 
  it 
  to 
  our 
  purposes. 
  Afterward 
  a 
  

   second 
  similar 
  instrument 
  from 
  the 
  same 
  workshop 
  was 
  used, 
  a 
  

   drawing 
  of 
  which 
  (tig. 
  1) 
  is 
  here 
  given. 
  

  

  * 
  Wiebe 
  and 
  Bottcher, 
  Zeitschr. 
  fiir 
  Instr., 
  x, 
  18, 
  1890. 
  

  

  