﻿Phil. 
  Mag. 
  Ser. 
  6, 
  Yol. 
  16. 
  PL 
  XIII. 
  

  

  P.D. 
  and 
  Current 
  Wave-Forms 
  of 
  Short 
  Sparks. 
  

   Fig. 
  3. 
  — 
  Spark-length 
  equals 
  zero. 
  

  

  -Zero 
  line 
  

   for 
  Current. 
  

  

  Fig. 
  4. 
  — 
  Spark-length 
  1 
  mm. 
  

  

  

  wmyj^mm 
  

  

  

  

  ^-'-- 
  ■■■ 
  

  

  

  • 
  ,11 
  HI 
  ''V- 
  

  

  

  

  

  n 
  . 
  - 
  

  

  

  

  vy 
  

  

  

  u 
  

  

  y 
  

  

  w 
  

  

  u 
  

  

  — 
  Zero 
  line 
  

   for 
  Current. 
  

  

  -Zero 
  line 
  

   for 
  P.D. 
  

  

  