﻿n 
  on 
  reflexion 
  from 
  ste 
  

   and 
  low 
  dispersion 
  arra 
  

  

  Vavelen^th 
  

  

  OO0 
  wth 
  2 
  5" 
  

   wfh 
  45' 
  

  

  Phil. 
  Mag, 
  Ser. 
  6, 
  Vol, 
  18. 
  PI. 
  I. 
  

  

  /i 
  thickness. 
  

  

  r.5, 
  

  

  =/* 
  

  

  = 
  — 
  <■> 
  

  

  4- 
  

   O 
  

  

  «> 
  

  

  c 
  

   O 
  

  

  s.o/* 
  

  

  3. 
  — 
  Curves 
  showing 
  the 
  variation 
  of 
  transmission 
  

   with 
  wave-length 
  for 
  the 
  various 
  films. 
  

  

  ision 
  

  

  Fig. 
  

  

  ,70V 
  

  

  c 
  

   o 
  

  

  s 
  

  

  SQ/i- 
  

  

  --. 
  

  

  Q-_. 
  

  

  

  4^ 
  

  

  

  

  1 
  

  

  

  

  

  

  

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  ^ 
  

  

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  ' 
  

  

  

  

  

  

  

  

  \ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  ,° 
  

  

  t.OA> 
  I.S>» 
  

  

  wavelength 
  

  

  2,0/. 
  

  

  —Curves 
  showing 
  the 
  rotation 
  on 
  reflexion 
  from 
  the 
  

   glass-iron 
  surfaces 
  of 
  films 
  15, 
  17, 
  22. 
  

  

  z 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  \ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  ^^ 
  

  

  ^ 
  

  

  ^ 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

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  ^ 
  

  

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  — 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  Wavelength. 
  

  

  a.c/*^ 
  

  

  