﻿into 
  the 
  'Skin 
  '-effect 
  in 
  Electrical 
  Oscillators- 
  435 
  

  

  gathered 
  up 
  by 
  the 
  wings 
  destroyed 
  a 
  portion 
  o£ 
  the 
  mag- 
  

   netization 
  of 
  the 
  iron. 
  The 
  change 
  in 
  the 
  magnetization 
  was 
  

   observed 
  in 
  a 
  magnetometer. 
  

  

  Fig. 
  7. 
  

  

  A 
  section 
  of 
  the 
  magnetometer 
  is 
  shown 
  at 
  M 
  in 
  fig. 
  8. 
  It 
  

   was 
  of 
  the 
  plainest 
  construction, 
  consisting 
  simply 
  of 
  a 
  

   mirror 
  10 
  mm. 
  in 
  diameter 
  with 
  two 
  small 
  steel 
  magnets 
  

   fastened 
  on 
  the 
  back 
  by 
  paraffin, 
  and 
  suspended 
  by 
  a 
  silk 
  

  

  Fig. 
  8. 
  

  

  «5 
  

  

  3=1 
  

  

  fibre 
  about 
  12 
  cms. 
  long. 
  Behind 
  it 
  was 
  a 
  block 
  B, 
  in 
  which 
  

   a 
  small 
  glass 
  tube, 
  closed 
  at 
  one 
  end, 
  was 
  wedged. 
  The 
  

   inner 
  diameter 
  of 
  this 
  tube 
  was 
  approximately 
  equal 
  to 
  the 
  

   outer 
  diameter 
  of 
  the 
  detector-tube, 
  so 
  that 
  the 
  latter 
  moved 
  

   snugly 
  into 
  the 
  former, 
  and, 
  when 
  pushed 
  in 
  as 
  far 
  as 
  it 
  

   would 
  go, 
  was 
  in 
  a 
  definite 
  position 
  which 
  could 
  easily 
  be 
  

   recovered. 
  

  

  The 
  block 
  B 
  was 
  fastened 
  on 
  the 
  upper 
  face 
  of 
  a 
  board 
  N 
  

   by 
  a 
  screw 
  a 
  around 
  which 
  it 
  could 
  be 
  given 
  a 
  slow 
  motion 
  

   by 
  a 
  screw 
  S, 
  thus 
  easily 
  making 
  the 
  detector 
  approach 
  or 
  

   recede 
  from 
  the 
  magnetometer 
  bv 
  a 
  small 
  amount. 
  The 
  

   telescope 
  and 
  scale 
  A 
  were 
  about 
  120 
  cms. 
  from 
  the 
  magneto- 
  

   meter. 
  

  

  The 
  position 
  of 
  the 
  magnetometer 
  was 
  adjusted 
  so 
  that 
  

  

  