﻿FOR 
  OBTAINING 
  CAPRIC 
  ACID. 
  223 
  

  

  I 
  endeavoured 
  to 
  obtain 
  some 
  other 
  salts 
  of 
  capric 
  acid, 
  but 
  as 
  only 
  the 
  salts 
  

   of 
  the 
  alkaline 
  earths 
  are 
  readily 
  crystallizable, 
  I 
  did 
  not 
  succeed 
  in 
  doing 
  so. 
  The 
  

   salts 
  I 
  tried 
  were 
  the 
  soda, 
  copper, 
  and 
  lead 
  salts. 
  The 
  copper 
  salt 
  is 
  insoluble 
  in 
  

   water 
  and 
  alcohol, 
  but 
  soluble 
  in 
  ammonia. 
  The 
  analyses 
  of 
  these 
  salts 
  always 
  

   gave 
  an 
  excess 
  of 
  base 
  ; 
  this 
  was 
  caused 
  by 
  my 
  not 
  being 
  able 
  to 
  obtain 
  a 
  neutral 
  

   ammoniacal 
  salt 
  of 
  capric 
  acid. 
  The 
  lead 
  salt 
  is 
  insoluble 
  in 
  water, 
  and 
  very 
  

   sparingly 
  soluble 
  in 
  boiling 
  alcohol 
  ; 
  the 
  solution, 
  on 
  cooling, 
  deposits 
  the 
  lead 
  

   salt 
  in 
  rounded 
  grains. 
  

  

  The 
  soda 
  salt 
  is 
  exceedingly 
  soluble 
  both 
  in 
  cold 
  water 
  and 
  alcohol, 
  and 
  does 
  

   not 
  crystallize 
  from 
  these 
  solutions. 
  When 
  evaporated 
  to 
  dryness, 
  it 
  dries 
  up 
  to 
  

   a 
  horny 
  mass, 
  partially 
  crystalline 
  on 
  the 
  surface. 
  It 
  is 
  soluble 
  in 
  absolute 
  al- 
  

   cohol 
  when 
  warmed, 
  and 
  the 
  solution 
  when 
  allowed 
  to 
  cool 
  becomes 
  an 
  opalescent 
  

   mass. 
  I 
  could 
  not 
  obtain 
  it 
  free 
  from 
  NaO, 
  CO,, 
  even 
  by 
  means 
  of 
  absolute 
  

   alcohol, 
  consequently 
  the 
  analysis 
  gave 
  an 
  excess 
  of 
  base. 
  

  

  From 
  the 
  analyses 
  made 
  of 
  the 
  soda 
  and 
  copper 
  salts, 
  they 
  appear 
  to 
  be 
  

   neutral 
  salts; 
  the 
  formula 
  of 
  the 
  soda 
  salt 
  being 
  NaO, 
  C 
  20 
  H 
  19 
  3 
  , 
  that 
  of 
  the 
  

   copper 
  salt 
  being 
  CuO, 
  C 
  20 
  H, 
  9 
  3 
  . 
  

  

  Capric 
  Ether. 
  

  

  This 
  ether 
  I 
  obtained 
  by 
  dissolving 
  capric 
  acid 
  in 
  absolute 
  alcohol, 
  and 
  passing 
  

   dry 
  hydrochloric 
  acid 
  gas 
  into 
  the 
  solution 
  to 
  saturation. 
  The 
  addition 
  of 
  water 
  

   to 
  the 
  solution 
  caused 
  the 
  capric 
  ether 
  to 
  rise 
  to 
  the 
  surface 
  as 
  an 
  oily 
  liquid. 
  It 
  

   was 
  separated 
  from 
  the 
  acid 
  liquid 
  and 
  washed 
  with 
  cold 
  water, 
  and 
  then 
  dried 
  

   by 
  digesting 
  it 
  with 
  fused 
  Ca, 
  CI 
  : 
  its 
  specific 
  gravity 
  is 
  -862. 
  It 
  is 
  insoluble 
  in 
  

   cold 
  water, 
  but 
  readily 
  soluble 
  in 
  alcohol 
  and 
  ether. 
  As 
  the 
  quantity 
  of 
  the 
  ether 
  

   was 
  too 
  small 
  to 
  allow 
  of 
  an 
  analysis 
  of 
  it 
  being 
  made, 
  I 
  converted 
  it 
  into 
  the 
  

   following 
  compound 
  : 
  — 
  

  

  Capramide. 
  

  

  The 
  capric 
  ether 
  was 
  dissolved 
  in 
  alcohol, 
  and 
  a 
  strong 
  solution 
  of 
  ammonia 
  

   was 
  added 
  to 
  it 
  in 
  a 
  stoppered 
  bottle 
  ; 
  after 
  a 
  few 
  days 
  the 
  solution 
  became 
  turbid 
  ; 
  

   this 
  turbidity 
  increased 
  after 
  allowing 
  it 
  to 
  stand 
  for 
  a 
  longer 
  period, 
  and 
  crystals 
  

   began 
  to 
  make 
  their 
  appearance. 
  The 
  digestion 
  was 
  continued 
  until 
  the 
  whole 
  of 
  

   the 
  ether 
  had 
  disappeared. 
  The 
  crystals 
  were 
  then 
  filtered 
  off, 
  and 
  the 
  filtrate 
  

   evaporated 
  to 
  dryness 
  on 
  a 
  water-bath 
  ; 
  the 
  residue 
  was 
  dissolved 
  in 
  alcohol, 
  and 
  

   the 
  addition 
  of 
  water 
  caused 
  the 
  capramide 
  to 
  crystallize 
  from 
  the 
  solution 
  ; 
  the 
  

   whole 
  was 
  dissolved 
  in 
  warm 
  dilute 
  alcohol, 
  and 
  allowed 
  to 
  crystallize. 
  As 
  ob- 
  

   tained 
  in 
  this 
  manner 
  it 
  is 
  quite 
  colourless, 
  and 
  crystallizes 
  in 
  brilliant 
  scales, 
  which, 
  

   when 
  dry, 
  have 
  a 
  bright 
  silvery 
  lustre. 
  It 
  fuses 
  below 
  212 
  Fahr., 
  and 
  is 
  insoluble 
  

   in 
  water 
  and 
  ammonia. 
  It 
  is 
  very 
  soluble 
  in 
  cold 
  alcohol, 
  and 
  in 
  dilute 
  alcohol 
  

   when 
  warmed 
  in 
  it. 
  Its 
  other 
  properties 
  I 
  could 
  not 
  examine, 
  as 
  I 
  had 
  only 
  suf- 
  

  

  VOL. 
  XX. 
  PART 
  II. 
  3 
  o 
  

  

  