﻿Phil. 
  Mae:. 
  Ser. 
  6. 
  To]. 
  18. 
  PI. 
  XIV. 
  

  

  Fig. 
  ly. 
  — 
  Yariation 
  of 
  the 
  striation 
  with 
  electrical 
  conditions. 
  

  

  (^) 
  

  

  (^0 
  

  

  (0 
  

  

  (d) 
  

  

  (e) 
  

  

  Figa. 
  (a) 
  to 
  (e) 
  refer 
  to 
  circuits 
  giving 
  oscillations 
  in 
  descending 
  order 
  of 
  

   frequency. 
  

  

  Figs. 
  (/) 
  to 
  (k) 
  refer 
  to 
  a 
  series 
  of 
  circuits 
  for 
  which 
  the 
  frequencies 
  were 
  

   measured. 
  These 
  are 
  shown 
  to 
  the 
  right 
  of 
  the 
  corresponding 
  figures. 
  

  

  •46 
  mm. 
  (f) 
  

  

  '38 
  mm, 
  (^) 
  

  

  •40 
  ram. 
  (h) 
  

  

  •33 
  mm. 
  (k) 
  

  

  •68X106. 
  

  

  •79 
  X 
  106. 
  

  

  1-4x106. 
  

  

  21x106. 
  

  

  The 
  strige-distances 
  are 
  shown 
  on 
  the 
  left. 
  

  

  