﻿814 
  

  

  Mr. 
  H. 
  L. 
  P. 
  Jolly 
  on 
  the 
  

  

  by 
  obtaining 
  any 
  two 
  points 
  on 
  the 
  curve 
  with 
  direct 
  appli- 
  

   cation 
  of 
  potential 
  from 
  cells, 
  and 
  finding 
  out 
  whether 
  the 
  

   resistances 
  corresponding 
  on 
  the 
  tirst 
  curve 
  to 
  the 
  two 
  given 
  

   deflexions 
  are 
  in 
  the 
  same 
  ratio 
  as 
  the 
  two 
  potentials 
  applied. 
  

  

  Q= 
  Quartz. 
  

  

  G 
  = 
  Glas?. 
  

  

  A 
  = 
  Aluminium. 
  

  

  C 
  = 
  Copper. 
  

  

  E, 
  = 
  Indiar 
  ubber. 
  

  

  Sealing-wax 
  joints 
  dark 
  shaded. 
  

  

  The 
  general 
  regularity 
  of 
  the 
  potentiometer 
  curve 
  is 
  also 
  an 
  

   indication 
  that 
  the 
  current 
  has 
  not 
  varied 
  in 
  any 
  irregular 
  

  

  