﻿356 
  dr 
  Anderson's 
  researches 
  on 
  some 
  of 
  the 
  

  

  ordinary 
  temperatures, 
  33-28 
  per 
  cent, 
  was 
  taken 
  up. 
  These 
  results 
  are 
  very 
  un- 
  

   intelligible, 
  and 
  certainly 
  cannot 
  be 
  employed 
  as 
  the 
  foundation 
  of 
  an 
  atomic 
  

   weight. 
  It 
  is, 
  however, 
  worthy 
  of 
  observation, 
  that 
  they 
  are 
  very 
  nearly 
  in 
  the 
  ratio 
  

   of 
  1, 
  2, 
  and 
  4, 
  but 
  this 
  relation 
  must 
  be 
  purely 
  fortuitous, 
  as 
  I 
  have 
  found 
  that 
  

   thebaine 
  is 
  very 
  easily 
  decomposed 
  by 
  hydrochloric 
  acid, 
  and 
  none 
  of 
  the 
  results 
  

   agree 
  at 
  all 
  with 
  the 
  actual 
  atomic 
  weight, 
  as 
  deduced 
  from 
  the 
  experiments 
  which 
  

   I 
  am 
  about 
  to 
  detail. 
  

  

  VII. 
  Analysis 
  of 
  Thebaine. 
  

  

  The 
  thebaine 
  employed 
  for 
  analysis 
  was 
  prepared 
  by 
  the 
  process 
  already 
  de- 
  

   scribed, 
  and 
  purified 
  by 
  repeated 
  crystallisation 
  ; 
  it 
  was 
  burned 
  with 
  oxide 
  of 
  cop- 
  

   per, 
  and 
  is 
  very 
  easily 
  combustible. 
  

  

  {5-475 
  grains 
  of 
  thebaine, 
  dried 
  at 
  212°, 
  gave 
  

   14-675 
  ... 
  carbonic 
  acid, 
  and 
  

   3-500 
  ... 
  water. 
  

  

  {4-990 
  grains 
  of 
  thebaine 
  gave 
  

   13383 
  ... 
  carbonic 
  acid, 
  and 
  

   3135 
  ... 
  water. 
  

  

  {5-089 
  grains 
  of 
  thebaine, 
  of 
  another 
  preparation, 
  gave 
  

   13621 
  ... 
  carbonic 
  acid, 
  and 
  

   3-228 
  ... 
  water. 
  

  

  f 
  5-336 
  grains 
  of 
  thebaine 
  gave 
  

  

  \ 
  3 
  - 
  735 
  ... 
  platinochloride 
  of 
  ammonium. 
  

  

  f 
  6-332 
  grains 
  of 
  thebaine 
  gave 
  

  

  \ 
  4-515 
  ... 
  platinochloride 
  of 
  ammonium. 
  

  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  Carbon, 
  

  

  73-10 
  

  

  73-14 
  

  

  73-01 
  

  

  Hydrogen, 
  

  

  710 
  

  

  698 
  

  

  7-04 
  

  

  Nitrogen, 
  

  

  4-39 
  

  

  4-47 
  

  

  

  Oxygen, 
  

  

  15-41 
  

  

  15-41 
  

  

  ... 
  

  

  100-00 
  100-00 
  

  

  These 
  results 
  correspond 
  exactly 
  with 
  the 
  formula, 
  

  

  C33 
  H 
  21 
  NO 
  fi 
  

  

  differing 
  from 
  that 
  of 
  codeine 
  by 
  two 
  equivalents 
  of 
  carbon, 
  as 
  is 
  seen 
  from 
  the 
  

   following 
  comparison 
  of 
  the 
  experimental 
  mean 
  with 
  the 
  calculated 
  result 
  of 
  that 
  

   formula. 
  

  

  Carbon, 
  

   Hydrogen, 
  

   Nitrogen, 
  

   Oxygen, 
  

  

  Mean. 
  

  

  

  Calculation. 
  

  

  

  73-08 
  

  

  73-31 
  

  

  ^ 
  3S 
  

  

  228 
  

  

  704 
  

  

  6-75 
  

  

  H 
  21 
  

  

  21 
  

  

  4-43 
  

  

  4-50 
  

  

  N 
  

  

  14 
  

  

  15-45 
  

  

  15-44 
  

  

  o 
  6 
  

  

  48 
  

  

  100-00 
  100-00 
  311 
  

  

  