﻿782 
  Dr. 
  J. 
  Kunz 
  on 
  the 
  Corpuscular 
  

  

  values 
  of 
  C, 
  which, 
  however, 
  are 
  not 
  to 
  be 
  considered 
  as 
  

   definite 
  figures. 
  

  

  C. 
  

  

  Cd 
  0*0604 
  

  

  Zn 
  0-0404 
  

  

  Ag 
  0-0207 
  

  

  Cu 
  0-0186 
  

  

  Sn 
  0-0119 
  

  

  If 
  C 
  had 
  really 
  different 
  values 
  for 
  various 
  metals 
  

   (Ta 
  — 
  a-fj 
  would 
  be 
  equal 
  to 
  

  

  , 
  / 
  ~b 
  log 
  =r=3 
  \ 
  

  

  and 
  there 
  would 
  be 
  no 
  more 
  agreement 
  between 
  the 
  thermo- 
  

   dynamical 
  and 
  corpuscular 
  theory 
  of 
  the 
  Thomson 
  effect. 
  

  

  § 
  7. 
  On 
  the 
  Electric 
  Force 
  X 
  and 
  Pyro 
  electricity. 
  

   We 
  found 
  _ 
  4 
  « 
  T 
  d 
  log 
  N 
  a 
  a 
  

  

  _4 
  « 
  T 
  B 
  logNrt 
  Ba 
  a 
  

   °"~3« 
  9a; 
  BT~<?' 
  

  

  6 
  e 
  o% 
  

  

  hence 
  v 
  ~dx 
  a 
  

  

  But 
  ,_ 
  T 
  /Q 
  a 
  

  

  hence 
  Vx-V 
  2 
  = 
  ^(T^Tx 
  2 
  ). 
  

  

  From 
  this 
  corpuscular 
  theory 
  of 
  thermoelectricity 
  we 
  

   should 
  expect 
  a 
  potential-difference 
  between 
  the 
  ends 
  of 
  a 
  

   metallic 
  bar 
  whose 
  temperature 
  varies 
  from 
  T 
  2 
  to 
  T 
  x 
  . 
  This 
  

  

  