﻿244 
  MR 
  HENRY 
  HOW 
  ON 
  CERTAIN 
  SALTS 
  AND 
  

  

  Experiment. 
  Calculation. 
  

  

  Carbon, 
  . 
  . 
  30-20 
  29-92 
  C„ 
  72 
  

  

  12 
  

  

  Hydrogen, 
  . 
  2-68 
  2-82 
  H 
  G 
  6 
  

  

  Oxygen, 
  . 
  . 
  ... 
  30-62 
  9 
  72 
  

  

  Nitrogen, 
  . 
  ... 
  5-81 
  N 
  14 
  

  

  Baryta, 
  . 
  . 
  32-02 
  31-83 
  BaO 
  76-64 
  

  

  100-00 
  100-00 
  240-64 
  

  

  The 
  formula 
  deduced 
  from, 
  the 
  analysis 
  of 
  this 
  substance, 
  supposing 
  it 
  to 
  be 
  the 
  

   neutral 
  salt 
  of 
  a 
  monobasic 
  acid 
  will 
  be 
  

  

  BaO, 
  NH 
  2 
  C 
  12 
  H 
  2 
  7 
  + 
  2 
  HO. 
  

   Comenamate 
  of 
  baryta, 
  precipitated 
  in 
  an 
  alkaline 
  solution 
  of 
  the 
  ammonia 
  

   salt 
  by 
  chloride 
  of 
  barium, 
  falls 
  as 
  a 
  heavy 
  white 
  powder, 
  insoluble 
  in 
  boiling 
  

   water. 
  Its 
  analysis 
  is 
  subjoined 
  : 
  — 
  

  

  ( 
  6-023 
  grains 
  dried 
  at 
  212° 
  gave 
  

   < 
  5-065 
  ... 
  carbonic 
  acid, 
  and 
  

   [0-989 
  ... 
  water. 
  

  

  f 
  5-247 
  grains 
  dried 
  at 
  212° 
  gave 
  

   \ 
  4-020 
  ... 
  sulphate 
  of 
  baryta. 
  

  

  Experiment. 
  Calculation. 
  

  

  Carbon, 
  

  

  22-93 
  

  

  23-35 
  

  

  C 
  12 
  72 
  

  

  Hydrogen 
  

  

  1-80 
  

  

  1-62 
  

  

  H 
  5 
  5 
  

  

  Oxygen, 
  . 
  

  

  

  20-77 
  

  

  8 
  64 
  

  

  Nitrogen, 
  . 
  

  

  

  4-54 
  

  

  N 
  14 
  

  

  Baryta, 
  

  

  50-29 
  

  

  49-72 
  

  

  2BaO 
  153-28 
  

  

  100-00 
  100-00 
  308-28 
  

  

  From 
  this 
  analysis 
  it 
  follows, 
  that, 
  to 
  assimilate 
  this 
  salt 
  to 
  the 
  last, 
  it 
  must 
  

   be 
  considered 
  as 
  a 
  basic 
  compound, 
  in 
  which 
  one 
  of 
  the 
  equivalents 
  of 
  water 
  re- 
  

   tained 
  at 
  212°, 
  is 
  replaced 
  by 
  an 
  atom 
  of 
  baryta, 
  according 
  to 
  the 
  formula 
  

  

  BaO, 
  NH 
  2 
  C 
  12 
  H 
  2 
  7 
  + 
  BaO 
  HO. 
  

  

  As 
  precipitated 
  from 
  water, 
  it 
  contains 
  an 
  additional 
  equivalent 
  of 
  water 
  : 
  — 
  

  

  [ 
  11-720 
  grains 
  air-dry 
  lost 
  at 
  212° 
  

   ( 
  0-362 
  ... 
  water. 
  

  

  the 
  per-centage 
  calculation 
  from 
  the 
  experiment 
  is 
  3'08 
  ; 
  and 
  the 
  number 
  2-83 
  

   corresponds 
  to 
  the 
  formula 
  

  

  BaO, 
  NH 
  2 
  C 
  12 
  H 
  2 
  7 
  , 
  BaO 
  HO 
  + 
  aq. 
  

  

  The 
  salts 
  of 
  lime 
  are 
  very 
  similar 
  in 
  appearance 
  to 
  the 
  above, 
  and 
  with 
  every 
  

   base 
  this 
  acid 
  seems 
  to 
  form 
  two 
  salts, 
  which 
  is 
  a 
  curious 
  fact, 
  since, 
  reasoning 
  

   from 
  analogy, 
  a 
  substance 
  originating 
  as 
  it 
  does, 
  should 
  be 
  monobasic 
  in 
  its 
  

   nature. 
  I 
  am 
  not 
  at 
  present 
  able 
  to 
  afford 
  any 
  further 
  information 
  on 
  the 
  subject 
  

   of 
  its 
  constitution 
  and 
  products 
  of 
  decomposition 
  ; 
  but 
  I 
  may 
  mention 
  that 
  I 
  have 
  

   observed, 
  in 
  its 
  behaviour 
  under 
  certain 
  circumstances, 
  phenomena 
  which 
  I 
  believe 
  

   may 
  prove 
  of 
  sufficient 
  interest 
  to 
  encourage 
  investigation. 
  I 
  append 
  a 
  list 
  of 
  the 
  

   salts, 
  &c, 
  mentioned 
  in 
  this 
  paper. 
  

  

  