﻿Media 
  Subjected 
  to 
  Torsion. 
  

  

  95 
  

  

  In 
  Table 
  III 
  are 
  tabulated 
  all 
  the 
  observations 
  with 
  jelly 
  

   tubes. 
  Some 
  tubes 
  were 
  found 
  so 
  double 
  refractiug 
  or 
  opaque 
  

   that 
  determiuations 
  were 
  impossible, 
  but 
  the 
  observations 
  are 
  

   recorded 
  for 
  every 
  experiment 
  where 
  readings 
  could 
  be 
  made. 
  

   The 
  first 
  column 
  gives 
  the 
  chronological 
  number 
  of 
  the 
  experi- 
  

   ment, 
  the 
  second 
  the 
  number 
  of 
  the 
  jelly 
  tube, 
  the 
  third 
  the 
  

   length 
  of 
  the 
  tube, 
  the 
  fourth 
  the 
  twist 
  per 
  centimeter 
  of 
  

   leugtli. 
  The 
  fifth 
  column 
  gives 
  the 
  rotation 
  of 
  the 
  plane 
  of 
  

   polarization 
  per 
  centimeter 
  of 
  length. 
  The 
  readings 
  in 
  brackets 
  

   for 
  the 
  jelly 
  in 
  its 
  initial 
  condition, 
  before 
  any 
  twist, 
  give 
  the 
  

   natural 
  negative 
  rotation 
  of 
  the 
  gelatine, 
  if 
  it 
  is 
  pure, 
  or 
  the 
  

   resultant 
  positive 
  rotation 
  if 
  sugar 
  has 
  been 
  added. 
  This 
  

   initial 
  rotation 
  has 
  been 
  subtracted 
  from 
  all 
  the 
  readings 
  with- 
  

   out 
  brackets 
  so 
  that 
  the 
  unbracketed 
  numbers 
  give 
  the 
  rota- 
  

   tion 
  produced 
  by 
  the 
  twist. 
  Each 
  number 
  of 
  the 
  fifth 
  column 
  

   is 
  the 
  mean 
  of 
  readings 
  in 
  sixteen 
  azimuths. 
  

  

  

  

  

  

  Table 
  

  

  III. 
  

  

  

  

  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  lY. 
  

  

  V. 
  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  IV- 
  

  

  V. 
  

  

  1 
  

  

  1 
  

  

  5-5 
  

  

  15 
  

  

  (0°-63) 
  

  

  38 
  

  

  7 
  

  

  1^55 
  

  

  

  

  (-l°-86) 
  

  

  2 
  

  

  C( 
  

  

  " 
  

  

  

  

  ( 
  -4) 
  

  

  39 
  

  

  a 
  

  

  

  27 
  

  

  -1-7 
  

  

  3 
  

  

  u 
  

  

  If 
  

  

  -15 
  

  

  (•72) 
  

  

  40 
  

  

  u 
  

  

  

  -27 
  

  

  16-7 
  

  

  4 
  

  

  u 
  

  

  It 
  

  

  

  

  (•65) 
  

  

  41 
  

  

  8 
  

  

  2-07 
  

  

  

  

  (-1-8) 
  

  

  5 
  

  

  It 
  

  

  tt 
  

  

  

  

  (•83) 
  

  

  42 
  

  

  " 
  

  

  

  20 
  

  

  -•96 
  

  

  6 
  

  

  u 
  

  

  (t 
  

  

  15 
  

  

  (1-15) 
  

  

  43 
  

  

  II 
  

  

  

  -20 
  

  

  •1 
  

  

  7 
  

  

  2 
  

  

  tt 
  

  

  23 
  

  

  (-3-3) 
  

  

  44 
  

  

  9 
  

  

  3^1 
  

  

  

  

  (-1-6) 
  

  

  8 
  

  

  " 
  

  

  " 
  

  

  -23 
  

  

  (3-8) 
  

  

  45 
  

  

  " 
  

  

  

  14 
  

  

  —5-1 
  

  

  9 
  

  

  3 
  

  

  tt 
  

  

  -18 
  

  

  (2-0) 
  

  

  46 
  

  

  " 
  

  

  

  -14 
  

  

  •06 
  

  

  10 
  

  

  u 
  

  

  (t 
  

  

  

  

  (1-7) 
  

  

  47 
  

  

  10 
  

  

  4^13 
  

  

  

  

  (-1-3) 
  

  

  11 
  

  

  (I 
  

  

  t( 
  

  

  18 
  

  

  (•88) 
  

  

  48 
  

  

  11 
  

  

  

  10 
  

  

  2^5 
  

  

  12 
  

  

  C( 
  

  

  " 
  

  

  -18 
  

  

  (•83) 
  

  

  49 
  

  

  " 
  

  

  

  -10 
  

  

  5^1 
  

  

  13 
  

  

  (1 
  

  

  tt 
  

  

  

  

  ( 
  -5) 
  

  

  50 
  

  

  11 
  

  

  6-2 
  

  

  

  

  (-1-9) 
  

  

  14 
  

  

  11 
  

  

  It 
  

  

  18 
  

  

  (-•27) 
  

  

  51 
  

  

  11 
  

  

  

  6 
  

  

  3^7 
  

  

  15 
  

  

  4 
  

  

  " 
  

  

  7 
  

  

  (1-15) 
  

  

  52 
  

  

  " 
  

  

  

  -6 
  

  

  1-8 
  

  

  16 
  

  

  " 
  

  

  It 
  

  

  

  

  (1-08) 
  

  

  53 
  

  

  12 
  

  

  1-55 
  

  

  

  

  (-1-02) 
  

  

  17 
  

  

  u 
  

  

  tt 
  

  

  -9 
  

  

  (1-06) 
  

  

  54 
  

  

  u 
  

  

  

  14 
  

  

  -03 
  

  

  18 
  

  

  3 
  

  

  It 
  

  

  

  

  (•32) 
  

  

  55 
  

  

  It 
  

  

  

  -14 
  

  

  1-28 
  

  

  19 
  

  

  " 
  

  

  " 
  

  

  -7-6 
  

  

  •13 
  

  

  56 
  

  

  11 
  

  

  

  -27 
  

  

  15 
  

  

  20 
  

  

  ii 
  

  

  " 
  

  

  -15 
  

  

  •22 
  

  

  57 
  

  

  11 
  

  

  

  27 
  

  

  -2-3 
  

  

  21 
  

  

  " 
  

  

  tt 
  

  

  -23 
  

  

  V\ 
  

  

  58 
  

  

  tl 
  

  

  

  41 
  

  

  -6^9 
  

  

  22 
  

  

  (1 
  

  

  It 
  

  

  

  

  •14 
  

  

  59 
  

  

  " 
  

  

  

  -41 
  

  

  21 
  

  

  23 
  

  

  it 
  

  

  It 
  

  

  7-6 
  

  

  -•01 
  

  

  60 
  

  

  " 
  

  

  

  -41 
  

  

  17-6 
  

  

  24 
  

  

  tt 
  

  

  «' 
  

  

  15 
  

  

  -•OL 
  

  

  61 
  

  

  13 
  

  

  2^07 
  

  

  

  

  (-•87) 
  

  

  25 
  

  

  ti 
  

  

  It 
  

  

  23 
  

  

  -•65 
  

  

  62 
  

  

  It 
  

  

  

  10 
  

  

  -•12 
  

  

  26 
  

  

  tt 
  

  

  it 
  

  

  31 
  

  

  -r84 
  

  

  63 
  

  

  tl 
  

  

  

  -10 
  

  

  -•05 
  

  

  27 
  

  

  It 
  

  

  " 
  

  

  -31 
  

  

  r98 
  

  

  64 
  

  

  " 
  

  

  

  -20 
  

  

  204 
  

  

  28 
  

  

  tt 
  

  

  It 
  

  

  

  

  •0 
  

  

  65 
  

  

  tt 
  

  

  

  20 
  

  

  -•18 
  

  

  29 
  

  

  It 
  

  

  It 
  

  

  

  

  •02 
  

  

  66 
  

  

  " 
  

  

  

  31 
  

  

  -•54 
  

  

  30 
  

  

  5 
  

  

  6 
  

  

  

  

  (•56) 
  

  

  67 
  

  

  " 
  

  

  

  -31 
  

  

  1-81 
  

  

  31 
  

  

  tt 
  

  

  tt 
  

  

  7-6 
  

  

  -5 
  

  

  68 
  

  

  (1 
  

  

  

  -51 
  

  

  5-49 
  

  

  32 
  

  

  6 
  

  

  4 
  

  

  

  

  (-1-2) 
  

  

  69 
  

  

  " 
  

  

  

  51 
  

  

  -1^47 
  

  

  33 
  

  

  tt 
  

  

  It 
  

  

  5-2 
  

  

  •1 
  

  

  70 
  

  

  14 
  

  

  31 
  

  

  

  

  (-M8) 
  

  

  34 
  

  

  " 
  

  

  It 
  

  

  10-5 
  

  

  -1-7 
  

  

  71 
  

  

  " 
  

  

  

  7 
  

  

  -•23 
  

  

  35 
  

  

  (t 
  

  

  " 
  

  

  

  

  -12 
  

  

  72 
  

  

  " 
  

  

  

  — 
  7 
  

  

  •56 
  

  

  36 
  

  

  tt 
  

  

  It 
  

  

  -5 
  2 
  

  

  •01 
  

  

  73 
  

  

  11 
  

  

  

  -14 
  

  

  4^67 
  

  

  37 
  

  

  tt 
  

  

  " 
  

  

  -10-5 
  

  

  2-4 
  

  

  74 
  

  

  11 
  

  

  

  14 
  

  

  -2-98 
  

  

  