﻿404 
  MR 
  HENRY 
  HOW 
  ON 
  MECONIC 
  ACID, 
  

  

  {4-708 
  grains, 
  dried 
  at 
  212°, 
  gave 
  

   6 
  659 
  ... 
  carbonic 
  acid, 
  and 
  

   1-505 
  ... 
  water. 
  

  

  J" 
  4-052 
  grains, 
  dried 
  at 
  212°, 
  gave, 
  by 
  H 
  CI, 
  &c, 
  

   t 
  1-780 
  ... 
  platinum. 
  

  

  Calculation. 
  

  

  Carbon, 
  

  

  38-57 
  

  

  38-70 
  

  

  C 
  u 
  

  

  84 
  

  

  Hydrogen, 
  

  

  3-55 
  

  

  3-22 
  

  

  H 
  7 
  

  

  7 
  

  

  Oxygen, 
  . 
  

  

  . 
  .. 
  

  

  51-63 
  

  

  0.4 
  

  

  112 
  

  

  Nitrogen, 
  

  

  6-21 
  

  

  6-45 
  

  

  N 
  

  

  14 
  

  

  100-00 
  100-00 
  217 
  

  

  which 
  gives 
  as 
  the 
  formula 
  of 
  the 
  monobasic 
  meconate 
  of 
  ammonia, 
  as 
  dried 
  at 
  

  

  212° 
  

  

  2 
  HO, 
  NH 
  4 
  0,C 
  14 
  HO 
  n 
  

  

  The 
  crystallised 
  salt 
  contains 
  two 
  equivalents 
  of 
  water 
  ; 
  

  

  [9-535 
  grains 
  lost, 
  at 
  212°, 
  

   { 
  0-735 
  ... 
  water. 
  

  

  » 
  

  

  which 
  is 
  equal 
  to 
  7*70 
  per 
  cent. 
  ; 
  765 
  is 
  the 
  number 
  corresponding 
  to 
  the 
  for- 
  

   mula 
  

  

  2 
  HO 
  ; 
  NH 
  4 
  0, 
  C 
  u 
  HO 
  n 
  + 
  2 
  aq. 
  

  

  The 
  original 
  mother 
  liquor 
  of 
  this 
  salt 
  deposited 
  a 
  further 
  quantity 
  of 
  the 
  same 
  

   on 
  being 
  concentrated 
  ; 
  and 
  by 
  continued 
  evaporation 
  a 
  few 
  crystals 
  of 
  a 
  different 
  

   appearance 
  were 
  obtained 
  ; 
  when 
  these 
  were 
  separated, 
  and 
  recrystallised 
  from 
  

   boiling 
  water, 
  they 
  presented 
  themselves 
  in 
  the 
  form 
  of 
  long 
  square 
  prismatic- 
  

   needles. 
  In 
  their 
  appearance, 
  and 
  a 
  few 
  reactions, 
  they 
  shewed 
  the 
  characters 
  

   of 
  chlorocomenic 
  acid. 
  A 
  determination 
  of 
  the 
  chlorine 
  is, 
  I 
  think, 
  sufficient 
  to 
  

   prove 
  that 
  the 
  crystals 
  really 
  consist 
  of 
  this 
  acid. 
  

  

  f 
  3-315 
  grains, 
  dried 
  at 
  212° 
  gave, 
  after 
  burning 
  with 
  lime, 
  

   \ 
  2-505 
  ... 
  chloride 
  of 
  silver 
  ; 
  

  

  the 
  per-centage 
  of 
  chlorine 
  calculated 
  from 
  this 
  experiment 
  is 
  18*69, 
  which 
  agrees 
  

   very 
  closely 
  with 
  18-63, 
  the 
  number 
  corresponding 
  to 
  the 
  formula 
  of 
  chloroco- 
  

   menic 
  acid 
  in 
  the 
  dry 
  state. 
  

  

  2HO,C 
  12 
  {g|o 
  8 
  

  

  Oxalic 
  acid 
  is 
  found 
  in 
  the 
  last 
  mother 
  liquors 
  of 
  this 
  process. 
  

  

  Action 
  of 
  Bromine 
  on 
  Meconic 
  Acid. 
  

  

  Bromocomenic 
  Acid 
  ; 
  Carbonic 
  Acid. 
  — 
  I 
  had 
  no 
  doubt 
  of 
  finding 
  the 
  action 
  of 
  

   bromine 
  closely 
  similar 
  to 
  that 
  of 
  chlorine 
  on 
  meconate 
  of 
  ammonia 
  ; 
  but 
  it 
  

   occurred 
  to 
  me 
  it 
  would 
  be 
  more 
  readily 
  learned 
  from 
  employing 
  the 
  acid 
  itself, 
  

   whether 
  it 
  gave 
  a 
  substitution 
  product, 
  or 
  whether 
  its 
  molecule, 
  under 
  these 
  cir- 
  

   cumstances, 
  split 
  up 
  at 
  once 
  into 
  carbonic 
  acid 
  and 
  a 
  substitution 
  acid 
  of 
  comenic 
  

  

  