﻿imitates 
  the 
  Behaviour 
  of 
  Dielectrics. 
  

  

  241 
  

  

  right-hand 
  member 
  of 
  (2) 
  expresses 
  that 
  when 
  2 
  = 
  a 
  sudden 
  

   displacement 
  C 
  ( 
  = 
  " 
  charge 
  ") 
  is 
  impressed 
  on 
  the 
  model 
  at 
  

   the 
  point 
  x 
  = 
  0. 
  This 
  displacement 
  is 
  maintained 
  until 
  a 
  time 
  

   tf 
  = 
  Thas 
  elapsed, 
  when 
  release 
  ( 
  = 
  '• 
  discharge 
  ") 
  is 
  allowed 
  

   to 
  take 
  place. 
  

  

  •3 
  

  

  D/S 
  

  

  ^LfiC£A 
  

  

  i£A/r= 
  

  

  v 
  fs 
  

  

  :al£ 
  /' 
  

  

  C 
  4k 
  

  

  ■) 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  __ 
  

  

  -'- 
  

  

  

  - 
  — 
  " 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  —r" 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  \ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  \ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  V 
  

  

  N 
  

  

  

  

  

  

  

  

  

  

  1 
  

  

  

  

  

  

  

  

  Fig. 
  

  

  1. 
  

  

  

  

  

  

  

  . 
  

  

  

  

  

  J 
  

  

  

  

  

  T/ME 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  1 
  

  

  

  I 
  2 
  3 
  4 
  5 
  6 
  7 
  8 
  9 
  10 
  II 
  \2- 
  13 
  14- 
  15 
  16 
  17 
  

  

  25 
  

   ■£ 
  

  

  l/£ 
  

  

  \ociry 
  

  

  =& 
  

  

  (SCAL 
  

  

  "** 
  

  

  JM 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  f\ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  Fig. 
  

  

  I. 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  05 
  

  

  n 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  T~" 
  

  

  --- 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  l 
  

  

  I 
  

  

  3 
  

  

  4 
  

   T/ME 
  

  

  5 
  

  

  6 
  \ 
  

  

  

  7 
  

  

  8 
  

  

  9 
  

  

  10 
  

  

  JJ 
  

  

  

  

  tr 
  

  

  15 
  

  

  16 
  

  

  17 
  

  

  ,' 
  r 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  ? 
  

  

  

  

  

  

  

  

  

  t 
  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  As 
  an 
  example 
  of 
  a 
  more 
  complex 
  set 
  of 
  operations, 
  for 
  

   comparison 
  with 
  fig. 
  v, 
  PI. 
  V. 
  he. 
  eit., 
  I 
  give 
  here 
  figs. 
  3 
  & 
  4 
  

   (p. 
  242). 
  

  

  The 
  former 
  is 
  the 
  graph 
  of 
  (4) 
  below, 
  the 
  latter 
  is 
  the 
  

   derived 
  velocity-curve. 
  

  

  We 
  can 
  from 
  these 
  examples 
  see 
  how, 
  by 
  solutions 
  of 
  (1), 
  

   we 
  can 
  express 
  the 
  effect 
  of 
  any 
  given 
  set 
  of 
  conditions 
  as 
  

   regards 
  " 
  charge 
  " 
  or 
  u 
  discharge/'' 
  

  

  Phil. 
  Mag. 
  S. 
  6. 
  Vol. 
  3. 
  No. 
  14. 
  Feb. 
  1902. 
  R 
  

  

  