﻿222 
  MR 
  THOMAS 
  HENRY 
  ROWNEY 
  ON 
  A 
  NEW 
  SOURCE 
  

  

  Caprate 
  of 
  Baryta. 
  

  

  The 
  baryta 
  salt 
  was 
  obtained 
  by 
  adding 
  Ba 
  CI 
  to 
  an 
  ammoniacal 
  solution 
  of 
  

   capric 
  acid, 
  the 
  precipitate 
  was 
  filtered 
  and 
  washed 
  with 
  cold 
  water. 
  It 
  is 
  soluble 
  

   both 
  in 
  water 
  and 
  alcohol 
  when 
  boiled 
  with 
  these 
  liquids, 
  and 
  crystallizes 
  out 
  

   from 
  these 
  solutions, 
  on 
  cooling, 
  either 
  in 
  needle-shaped 
  or 
  prismatic 
  crystals 
  ; 
  

   the 
  crystals 
  obtained 
  from 
  the 
  alcoholic 
  solution 
  are 
  sometimes 
  of 
  coDsiderable 
  

   size. 
  This, 
  as 
  also 
  the 
  other 
  salts 
  of 
  the 
  alkaline 
  earths, 
  and 
  the 
  silver 
  salt, 
  are 
  

   insoluble 
  in 
  water 
  after 
  having 
  been 
  dried, 
  as 
  they 
  float 
  on 
  the 
  surface 
  of 
  the 
  

   water 
  and 
  repel 
  it 
  ; 
  but 
  by 
  first 
  moistening 
  the 
  salt 
  with 
  alcohol, 
  they 
  may 
  be 
  

   again 
  rendered 
  soluble 
  in 
  boiling 
  water. 
  They 
  are 
  also 
  very 
  difficult 
  to 
  powder 
  

   and 
  mix 
  for 
  analysis. 
  

  

  The 
  salt 
  analyzed 
  was 
  crystallized 
  from 
  water, 
  and 
  dried 
  in 
  the 
  water-bath 
  at 
  

   212° 
  Fahr. 
  The 
  baryta 
  was 
  determined 
  as 
  BaO, 
  S0 
  3 
  , 
  and 
  the 
  combustion 
  was 
  

   made 
  with 
  chromate 
  of 
  lead. 
  

  

  {'i 
  

  

  •2935 
  grammes 
  of 
  baryta 
  salt 
  gave 
  

   •1415 
  ... 
  of 
  BaO, 
  S0 
  3 
  . 
  

  

  TT 
  f 
  '4375 
  grammes 
  of 
  baryta 
  salt 
  gave 
  

   iJ 
  - 
  [-2125 
  ... 
  of 
  BaO, 
  S0 
  3 
  . 
  

  

  {•2411 
  grammes 
  of 
  baryta 
  salt 
  gave 
  

   •4410 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   •1750 
  ... 
  of 
  water. 
  

  

  {•2335 
  grammes 
  of 
  baryta 
  salt 
  gave 
  

   •4245 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   •1732 
  ... 
  of 
  water. 
  

  

  Theory. 
  Found. 
  

  

  

  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  IV. 
  

  

  Mean. 
  

  

  C 
  20 
  

  

  120 
  

  

  50-08 
  

  

  

  

  49-88 
  

  

  49-58 
  

  

  49-73 
  

  

  -^19 
  * 
  

  

  19 
  

  

  7-93 
  

  

  • 
  • 
  • 
  

  

  

  8-06 
  

  

  8-24 
  

  

  8-15 
  

  

  o 
  3 
  . 
  

  

  24 
  

  

  10-02 
  

  

  . 
  . 
  . 
  

  

  

  

  

  

  BaO 
  . 
  

  

  76-6 
  

  

  31-97 
  

  

  31-65 
  

  

  31-88 
  

  

  

  

  31-78 
  

  

  

  239-6 
  

  

  100-00 
  

  

  

  Caprates 
  of 
  Lime 
  and 
  Magnesia. 
  

  

  These 
  salts 
  crystallize 
  and 
  have 
  similar 
  properties 
  to 
  the 
  baryta 
  salt, 
  but 
  they 
  

   are 
  more 
  soluble 
  both 
  in 
  alcohol 
  and 
  boiling 
  water. 
  No 
  analysis 
  was 
  made 
  of 
  

   the 
  lime 
  salt, 
  but 
  the 
  base 
  of 
  the 
  magnesia 
  salt 
  was 
  determined. 
  The 
  salt 
  em- 
  

   ployed 
  for 
  this 
  purpose 
  was 
  crystallized 
  from 
  water, 
  and 
  dried 
  at 
  212° 
  Fahr. 
  The 
  

   magnesia 
  was 
  determined 
  as 
  2 
  MgO, 
  P0 
  5 
  . 
  

  

  f 
  -3687 
  grammes 
  of 
  caprate 
  of 
  magnesia 
  gave 
  

   (•1145 
  ... 
  of 
  2 
  MgO, 
  P0 
  5 
  . 
  

  

  The 
  formula 
  C 
  20 
  H 
  19 
  3 
  , 
  MgO 
  requires 
  11*25 
  per 
  cent, 
  of 
  MgO, 
  and 
  the 
  per-centage 
  

   obtained 
  by 
  analysis 
  was 
  11-37 
  MgO. 
  

  

  