﻿of 
  Rigidity 
  in 
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  Fields. 
  

  

  455 
  

  

  or 
  of 
  whole 
  groups 
  of 
  them 
  gave 
  way 
  at 
  once. 
  Upon 
  the 
  

   charts 
  is 
  given 
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  number 
  of 
  degrees 
  of 
  twist, 
  6. 
  registered 
  by 
  

   the 
  index 
  heads 
  u 
  and 
  p. 
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  or 
  

  

  -o 
  

  

  

  a 
  

  

  

  

  that 
  in 
  the 
  other 
  could 
  be 
  detected. 
  The 
  sign 
  of 
  the 
  scale- 
  

   deflections 
  due 
  to 
  viscous 
  slip 
  was 
  apparently 
  accidental, 
  yet 
  it 
  

   is 
  to 
  be 
  noted 
  that 
  most 
  of 
  the 
  slip 
  took 
  place 
  in 
  the 
  lower 
  — 
  

   the 
  unmagnetized 
  — 
  wire 
  ; 
  this 
  would 
  be 
  a 
  natural 
  result 
  of 
  an 
  

   increase 
  of 
  the 
  rigidity 
  of 
  the 
  upper 
  wire 
  by 
  magnetization. 
  

  

  