﻿96 
  

  

  Ewell 
  — 
  Rotatory 
  Polarization 
  of 
  Light 
  in 
  

  

  I 
  

  

  11. 
  

  

  III. 
  

  

  lY. 
  

  

  V. 
  

  

  I. 
  

  

  75 
  

  

  14 
  

  

  31 
  

  

  20 
  

  

  -10°9 
  

  

  102 
  

  

  76 
  

  

  

  

  — 
  20 
  

  

  13-7 
  • 
  

  

  103 
  

  

  77 
  

  

  

  

  -20 
  

  

  128 
  

  

  104 
  

  

  78 
  

  

  15 
  

  

  4-13 
  

  

  

  

  (-•96) 
  

  

  105 
  

  

  79 
  

  

  

  

  5 
  

  

  —45 
  

  

  106 
  

  

  80 
  

  

  

  

  — 
  5 
  

  

  •18 
  

  

  107 
  

  

  81 
  

  

  

  

  -10 
  

  

  •73 
  

  

  108 
  

  

  82 
  

  

  

  

  10 
  

  

  -•36 
  

  

  109 
  

  

  83 
  

  

  

  

  15 
  

  

  -1-94 
  

  

  110 
  

  

  84 
  

  

  

  

  

  

  •01 
  

  

  111 
  

  

  85 
  

  

  

  

  -15 
  

  

  1-8 
  

  

  112 
  

  

  8G 
  

  

  

  

  

  

  -•25 
  

  

  113 
  

  

  87 
  

  

  

  

  25 
  

  

  -7^75 
  

  

  114 
  

  

  88 
  

  

  

  

  

  

  -•53 
  

  

  115 
  

  

  89 
  

  

  

  

  -25 
  

  

  11-5 
  

  

  116 
  

  

  90 
  

  

  

  

  -25 
  

  

  11-2 
  

  

  117 
  

  

  91 
  

  

  

  

  

  

  -•43 
  

  

  118 
  

  

  92 
  

  

  

  

  25 
  

  

  -10^8 
  

  

  119 
  

  

  93 
  

  

  

  

  25 
  

  

  -10^1 
  

  

  120 
  

  

  94 
  

  

  

  

  

  

  -•77 
  

  

  121 
  

  

  95 
  

  

  16 
  

  

  6-2 
  

  

  

  

  (-1-06) 
  

  

  122 
  

  

  96 
  

  

  

  

  .S-4 
  

  

  -02 
  

  

  123 
  

  

  97 
  

  

  

  

  -3-4 
  

  

  •23 
  

  

  124 
  

  

  98 
  

  

  

  

  -7 
  

  

  1-46 
  

  

  125 
  

  

  99 
  

  

  

  

  7 
  

  

  -•01 
  

  

  126 
  

  

  100 
  

  

  

  

  10 
  

  

  -•41 
  

  

  127 
  

  

  101 
  

  

  

  

  -10 
  

  

  \-l% 
  

  

  128 
  

  

  IT. 
  

   16 
  

  

  18 
  

  

  19 
  

  

  20 
  

  

  21 
  

  

  23 
  

  

  III. 
  

   6-2 
  

  

  •07 
  

  

  IV. 
  

  

  3^1 
  

  

  2-07 
  

  

  3^1 
  

  

  14 
  

  

  4^-38 
  

  

  14 
  

  

  -1^97 
  

  

  17 
  

  

  -317 
  

  

  17 
  

  

  606 
  

  

  

   20 
  

  

  (-1-7) 
  

   12 
  

  

  20 
  

  

  -1-4 
  

  

  51 
  

  

  -3-9 
  

  

  

  

  •3 
  

  

  

  

  (-■4) 
  

   •2 
  

  

  

  

  •24 
  

  

  20 
  

  

  20 
  

  

  

  

  

  

  20 
  

  

  (-1-8) 
  

   (1-7) 
  

   (■34) 
  

   (-•78) 
  

   -4-37 
  

  

  20 
  

  

  1-15 
  

  

  

   20 
  

  

  (-1-36) 
  

   -•98 
  

  

  41 
  

  

  -20-6 
  

  

  

   20 
  

  

  (-1-6) 
  

   -9^79 
  

  

  

   21 
  

  

  (-•71) 
  

   -5-63 
  

  

  21 
  

  

  —4-99 
  

  

  

  

  -03 
  

  

  Tubes 
  1, 
  2, 
  3, 
  and 
  5 
  were 
  filled 
  with 
  a 
  commercial 
  prepared 
  

   calves-foot 
  jelly, 
  flavored 
  and 
  sweetened. 
  The 
  jelly 
  in 
  tube 
  1 
  

   was 
  too 
  liquid, 
  and 
  the 
  changes 
  in 
  the 
  position 
  of 
  the 
  analyzer 
  

   are 
  due 
  to 
  temperature 
  changes 
  and 
  other 
  disturbances. 
  K 
  

   small 
  bubble 
  of 
  air 
  was 
  present 
  in 
  tube 
  2. 
  The 
  rubber 
  tube 
  of 
  

   experiment 
  5 
  was 
  3^"' 
  in 
  diameter. 
  It 
  gave 
  way 
  after 
  the 
  first 
  

   twist. 
  Tubes 
  4, 
  6-16, 
  18-23, 
  contained 
  a 
  jelly 
  made 
  from 
  

   specially 
  refined 
  calves-foot 
  gelatine. 
  The 
  jelly 
  did 
  not 
  cling 
  

   to 
  the 
  rubber 
  tube 
  or 
  glass 
  plates 
  of 
  tube 
  4. 
  Tube 
  6 
  had 
  a 
  

   ring 
  of 
  blotting 
  paper 
  around 
  the 
  iuside 
  of 
  each 
  end 
  to 
  secure 
  

   better 
  adhesion. 
  The 
  observations 
  of 
  experiments 
  37-46 
  were 
  

   somewhat 
  uncertain 
  on 
  account 
  of 
  double 
  refraction. 
  The 
  

   readings 
  with 
  tubes 
  10 
  and 
  11 
  are 
  unreliable. 
  In 
  successive 
  

   azimuths 
  the 
  position 
  of 
  the 
  analyzer 
  might 
  change 
  from 
  +50° 
  

   to 
  —50° 
  owing 
  to 
  great 
  double 
  refraction. 
  Tubes 
  6-11, 
  20-23, 
  

   were 
  filled 
  with 
  very 
  stiff 
  jelly. 
  In 
  tube 
  IS 
  the 
  jelly 
  was 
  so 
  

   liquid 
  that 
  it 
  did 
  not 
  cling 
  to 
  the 
  rubber 
  walls 
  or 
  glass 
  and 
  con- 
  

   sequently 
  no 
  careful 
  reading 
  of 
  the 
  torsion 
  was 
  made. 
  Tube 
  

   17 
  contained 
  very 
  stiff 
  French 
  fish 
  gelatine. 
  After 
  the 
  experi- 
  

   ments 
  with 
  this 
  tube 
  it 
  was 
  found 
  that 
  the 
  polarimeter 
  had 
  

   been 
  disturbed 
  and 
  that 
  the 
  analyzer 
  and 
  polarizer 
  were 
  jiarallel 
  

   when 
  the 
  analyzer 
  was 
  at 
  11°'7. 
  This 
  probably 
  occurred 
  after 
  

   the 
  zero 
  reading 
  and 
  this 
  is 
  assumed 
  in 
  the 
  fifth 
  column, 
  but 
  

   on 
  account 
  of 
  this 
  uncertainty 
  this 
  tube 
  docs 
  not 
  appear 
  in 
  the 
  

   plot 
  given 
  later. 
  Tubes 
  2, 
  '3, 
  5-9, 
  J2-17, 
  19-28 
  show 
  clearly 
  

  

  