﻿in 
  Iron 
  by 
  Rapidly 
  Oscillating 
  Current-field* 
  

   Ym. 
  3.— 
  Curves 
  II. 
  

  

  511 
  

  

  oscillations 
  per 
  second. 
  

  

  Fiy. 
  4. 
  -Curves 
  III. 
  

  

  

  

  

  

  

  

  

  

  

  o 
  

  

  

  

  

  

  

  

  

  

  

  

  N 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  r*^ 
  

  

  ioM 
  L 
  

  

  

  

  

  

  

  

  

  

  

  

  N 
  ' 
  

  

  20-1 
  

  

  !i® 
  

  

  

  

  

  

  

  

  / 
  

  

  » 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  / 
  

  

  

  

  

  

  

  

  

  

  

  

  

  L 
  

  

  

  

  

  

  

  

  

  

  

  

  

  '/ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  10 
  20 
  30 
  40 
  50 
  SO 
  70 
  flO 
  90 
  100 
  MO 
  

  

  2 
  M2 
  

  

  