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  SUPPLEMENT. 
  

  

  While 
  engaged 
  with 
  the 
  investigation 
  of 
  codeine, 
  I 
  sent 
  to 
  Professor 
  Millee, 
  

   of 
  Cambridge, 
  some 
  crystals 
  of 
  the 
  base 
  and 
  its 
  sulphate 
  for 
  crystallographic 
  

   measurement. 
  Owing 
  to 
  Professor 
  Miller's 
  other 
  avocations, 
  he 
  was 
  unable 
  to 
  

   furnish 
  me 
  with 
  the 
  results 
  in 
  sufficient 
  time 
  to 
  admit 
  of 
  their 
  being 
  incorporated 
  

   with 
  the 
  foregoing 
  paper. 
  I 
  have, 
  therefore, 
  introduced 
  them 
  here 
  in 
  the 
  shape 
  

   of 
  a 
  supplement, 
  as 
  they 
  form 
  a 
  valuable 
  addition 
  to 
  the 
  observations 
  contained 
  

   in 
  the 
  paper. 
  

  

  Codeine. 
  — 
  Prismatic. 
  The 
  symbols 
  of 
  the 
  simple 
  forms 
  are, 
  c 
  001, 
  s 
  Oil, 
  

   e 
  101, 
  u 
  102, 
  m 
  110. 
  The 
  angles 
  between 
  normals 
  to 
  the 
  faces 
  are 
  : 
  

  

  Fig. 
  1. 
  

  

  m 
  c 
  

  

  90 
  

  

  

  

  s 
  c 
  

  

  38 
  

  

  37 
  

  

  ss' 
  

  

  77 
  

  

  14 
  

  

  ec 
  

  

  39 
  

  

  46 
  

  

  ee' 
  

  

  79 
  

  

  32 
  

  

  uc 
  

  

  22 
  

  

  35 
  

  

  uu' 
  

  

  45 
  

  

  10 
  

  

  mm' 
  

  

  87 
  

  

  40 
  

  

  em 
  

  

  63 
  

  

  42 
  

  

  sm 
  

  

  63 
  

  

  15 
  

  

  s 
  e 
  

  

  53 
  

  

  3 
  

  

  Cleavage, 
  

  

  c. 
  

  

  Fig. 
  2. 
  

  

  The 
  faces 
  m 
  m' 
  are 
  usually 
  of 
  very 
  unequal 
  magnitude. 
  The 
  faces 
  s 
  s? 
  were 
  

   not 
  observed 
  upon 
  the 
  same 
  crystals. 
  The 
  form 
  s 
  is 
  probably 
  hemihedral. 
  

  

  Fig. 
  1. 
  Codeine 
  crystallised 
  from 
  alcohol. 
  

  

  Fig. 
  2. 
  Codeine 
  crystallised 
  from 
  water. 
  

  

  The 
  agreement 
  of 
  the 
  different 
  observations 
  is 
  not 
  very 
  good, 
  so 
  that 
  the 
  

   above 
  measures 
  must 
  be 
  considered 
  as 
  approximations 
  only. 
  

  

  Sulphate 
  of 
  Codeine.— 
  Prismatic. 
  Symbols 
  of 
  the 
  simple 
  forms, 
  a 
  100, 
  e 
  101, 
  

   mllO. 
  

  

  The 
  angles 
  between 
  normals 
  to 
  the 
  faces 
  are 
  : 
  

  

  Fig. 
  3. 
  

  

  ea 
  

  

  66 
  

  

  15 
  

  

  ee' 
  

  

  46 
  

  

  30 
  

  

  m 
  a 
  

  

  75 
  

  

  36 
  

  

  m 
  m' 
  

  

  28 
  

  

  48 
  

  

  Cleavage, 
  a. 
  

  

  VOL. 
  XX. 
  PART 
  I. 
  

  

  