﻿Trowhridge 
  — 
  Investigation 
  of 
  the 
  Coherer. 
  

  

  203 
  

  

  tively 
  the 
  self-induction 
  and 
  capacity. 
  If 
  r'<;4^, 
  an 
  imagi- 
  

   nary 
  quantity 
  enters 
  into 
  the 
  expression 
  for 
  I, 
  this 
  is 
  the 
  con- 
  

   dition 
  for 
  a 
  periodic 
  discharge. 
  If, 
  on 
  the 
  other 
  hand, 
  r"^ 
  > 
  4 
  p, 
  

  

  we 
  have 
  an 
  aperiodic 
  discharge. 
  

  

  Under 
  the 
  conditions 
  present 
  in 
  my 
  investigation, 
  the 
  latter 
  

   case 
  was 
  certainly 
  realized, 
  for 
  r 
  normal 
  was 
  2000 
  ohms, 
  C 
  

  

  70 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  1 
  — 
  1 
  

  

  

  

  

  

  

  

  

  

  

  

  

  1 
  

  

  Q:1S 
  

  

  ( 
  

  

  i 
  

  

  iQ=4 
  j 
  

  

  «=6 
  

  

  ¥' 
  

  

  / 
  

  

  !-i5 
  -J 
  I.VZO 
  

  

  fiO 
  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  / 
  

  

  

  1 
  

  

  / 
  

  

  1 
  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  / 
  

  

  / 
  

  

  / 
  

  

  ' 
  f 
  

  

  V 
  

  

  

  

  50 
  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  1 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  1 
  

  

  / 
  

  

  / 
  

  

  / 
  

   / 
  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  / 
  

  

  h 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  /Q-3. 
  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  / 
  

  

  / 
  

  

  / 
  

  

  

  / 
  

  

  

  /^ 
  

  

  

  

  

  

  

  

  

  / 
  

  

  / 
  

  

  

  / 
  

  

  '/ 
  

  

  / 
  

  

  / 
  J 
  

  

  / 
  . 
  

  

  

  y 
  

  

  

  

  

  

  •?o 
  

  

  

  

  

  / 
  

  

  

  / 
  

  

  // 
  

  

  r 
  y 
  

  

  ^ 
  

  

  

  

  X 
  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  ^ 
  

  

  

  ^ 
  

   ^ 
  

  

  ^ 
  

  

  ■'■^^ 
  

  

  

  

  

  

  

  

  

  

  10 
  

  

  ^K 
  

  

  ^ 
  

  

  ^ 
  

  

  <>^ 
  

  

  ^ 
  

  

  ^: 
  

  

  r- 
  

  

  

  

  

  

  

  

  

  

  

  

  

  ^^ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  t) 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  0-05 
  0-1 
  

  

  0-2 
  

  

  0-3 
  

  

  0-4 
  

  

  0-5 
  

  

  0-6 
  

  

  07 
  

  

  from 
  3-2-0-05 
  microfarad 
  and 
  L 
  certainly 
  very 
  small, 
  say 
  less 
  

   than 
  0-01 
  quadrant. 
  

  

  t" 
  = 
  4-10' 
  ohm 
  = 
  4-10'' 
  cm. 
  sec.-' 
  

   = 
  0*05 
  microfarad 
  = 
  5-10-'^ 
  cm."' 
  sec.^ 
  

   L 
  = 
  say 
  0-01 
  quadrant 
  = 
  lO'lO' 
  

   L 
  10-10' 
  

  

  ^C-^5-10- 
  

  

  ;-10"<[4-10'* 
  = 
  r'] 
  

  

  As 
  L 
  is 
  certainly 
  less 
  than 
  the 
  value 
  here 
  assumed, 
  the 
  dis- 
  

   charge 
  circuit 
  being 
  a 
  short 
  straight 
  copper 
  wire, 
  it 
  is 
  evident 
  

  

  