﻿AND 
  SOME 
  OF 
  ITS 
  DERIVATIVES. 
  

  

  409 
  

  

  Meconamidic 
  Acid. 
  

  

  When 
  ethylomeconic 
  acid 
  is 
  dissolved 
  in 
  warm 
  water 
  or 
  alcohol, 
  and 
  an 
  excess 
  

   of 
  strong 
  aqueous 
  or 
  alcoholic 
  solution 
  of 
  ammonia 
  is 
  added, 
  the 
  fluid 
  assumes 
  a 
  

   deep 
  yellow 
  colour, 
  and 
  becomes 
  very 
  soon 
  filled 
  with 
  a 
  yellow 
  semi-gelatinous- 
  

   looking 
  substance, 
  which 
  after 
  being 
  washed 
  with 
  dilute 
  spirit, 
  dries 
  up 
  in 
  the 
  air 
  

   to 
  an 
  amorphous 
  mass, 
  which 
  powders 
  with 
  some 
  difficulty 
  to 
  a 
  very 
  fine 
  yellow 
  

   powder. 
  This 
  substance, 
  when 
  dissolved 
  in 
  hot 
  water, 
  smells 
  of 
  ammonia, 
  and 
  

   the 
  solution 
  gives, 
  with 
  dilute 
  fixed 
  alkalies, 
  abundant 
  evidence 
  of 
  its 
  contain- 
  

   ing 
  this 
  body 
  as 
  a 
  base. 
  I 
  was 
  at 
  first 
  of 
  the 
  opinion 
  that 
  it 
  was 
  the 
  neutral 
  

   salt 
  of 
  an 
  amide 
  acid 
  corresponding 
  to 
  ethylomeconic 
  acid, 
  and 
  formed 
  from 
  it 
  

   in 
  the 
  manner 
  characteristic 
  of 
  the 
  action 
  of 
  ammonia 
  in 
  these 
  cases, 
  in 
  which 
  

   one 
  atom 
  takes 
  the 
  place 
  of 
  an 
  equivalent 
  of 
  alcohol. 
  Upon 
  submitting 
  it 
  to 
  

   analysis, 
  however, 
  I 
  found 
  this 
  not 
  to 
  be 
  the 
  case 
  ; 
  and 
  it 
  appears 
  to 
  me 
  to 
  be 
  

   the 
  result 
  of 
  a 
  complicated 
  decomposition, 
  which 
  is, 
  so 
  far 
  as 
  I 
  am 
  aware, 
  without 
  

   analogy. 
  Upon 
  adding 
  to 
  its 
  solution 
  in 
  hot 
  water 
  some 
  hydrochloric 
  acid, 
  a 
  

   white 
  precipitate 
  is 
  obtained, 
  which 
  I 
  presume 
  to 
  be 
  the 
  acid 
  of 
  the 
  compound. 
  

   I 
  will 
  first 
  give 
  its 
  analysis, 
  and 
  the 
  formula 
  I 
  deduce 
  from 
  it, 
  to 
  render 
  more 
  

   clear 
  the 
  only 
  constitution 
  I 
  can 
  assign 
  to 
  these 
  two 
  bodies. 
  The 
  following 
  ana- 
  

   lyses 
  were 
  performed 
  on 
  specimens 
  of 
  different 
  preparations, 
  the 
  acid 
  was 
  recrys- 
  

   tallised 
  from 
  boiling 
  water, 
  it 
  then 
  appeared 
  as 
  a 
  white 
  crystalline 
  crust 
  or 
  

   rind 
  : 
  

  

  5-972 
  grains, 
  dried 
  at 
  212°, 
  gave 
  

   8-700 
  ... 
  carbonic 
  acid, 
  and 
  

   1-775 
  ... 
  water. 
  

  

  5-623 
  ... 
  dried 
  at 
  212°, 
  gave, 
  when 
  burnt 
  with 
  soda 
  lime, 
  

   ^7*020 
  ... 
  platinum 
  salt 
  of 
  ammonia. 
  

  

  ! 
  5-884 
  grains, 
  dried 
  at 
  212°, 
  gave 
  

   8-555 
  ... 
  carbonic 
  acid, 
  and 
  

   1-760 
  ... 
  water. 
  

   5-655 
  ... 
  dried 
  at 
  212°, 
  gave, 
  with 
  soda 
  lime, 
  

   7"250 
  ... 
  platinum 
  salt. 
  

  

  {5-205 
  grains, 
  dried 
  at 
  212°, 
  gave 
  

   7*540 
  ... 
  carbonic 
  acid, 
  and 
  

   1-530 
  ... 
  water. 
  

  

  f 
  7*925 
  grains, 
  dried 
  at 
  212°, 
  gave, 
  with 
  soda 
  lime, 
  

  

  

  [9-728 
  ... 
  

  

  I. 
  II. 
  

  

  . 
  39-73 
  39-65 
  

   . 
  3-30 
  3-32 
  

  

  7-84 
  8-05 
  

  

  platinum 
  

  

  III. 
  

  

  39-50 
  

   3-26 
  

  

  salt. 
  

   IV. 
  

  

  7 
  : 
  70 
  

  

  Mean. 
  

  

  39-62 
  

   3-29 
  

  

  7-86 
  

  

  

  Calculation. 
  

  

  Carbon, 
  

   Hydrogen. 
  

   Oxygen, 
  

   Nitrogen, 
  

  

  39-84 
  

  

  3-08 
  

  

  49-34 
  

  

  7-74 
  

  

  C 
  84 
  504 
  

   H 
  39 
  39 
  

  

  °78 
  624 
  

  

  N 
  7 
  98 
  

  

  100-00 
  

   VOL. 
  XX. 
  PART 
  III. 
  

  

  100-00 
  

  

  100-00 
  

  

  100-00 
  

  

  100-00 
  

  

  100-00 
  

  

  1265 
  

   5 
  s 
  

  

  