﻿DESTRUCTIVE 
  DISTILLATION 
  OF 
  ANIMAL 
  SUBSTANCES. 
  

  

  251 
  

  

  cipated, 
  and 
  proportionality 
  much 
  smaller 
  than 
  that 
  obtained 
  when 
  operating 
  

   on 
  a 
  much 
  smaller 
  scale 
  before 
  ; 
  and 
  I 
  consequently 
  found 
  myself 
  compelled 
  to 
  

   proceed 
  very 
  carefully, 
  so 
  as 
  to 
  avoid 
  loss 
  in 
  the 
  purification. 
  By 
  distilling 
  the 
  

   product 
  which 
  boiled 
  under 
  212°, 
  I 
  collected 
  fractions 
  nearly 
  equal 
  in 
  bulk 
  at 
  

   every 
  five 
  degrees, 
  all 
  very 
  similar 
  in 
  their 
  general 
  properties. 
  They 
  were 
  

   all 
  limpid 
  and 
  colourless 
  fluids, 
  with 
  high 
  refractive 
  power, 
  and 
  pungent 
  odour, 
  

   remarkably 
  similar 
  to 
  that 
  of 
  ammonia 
  in 
  the 
  lower 
  fractions. 
  They 
  fumed 
  

   strongly 
  when 
  a 
  rod 
  moistened 
  with 
  hydrochloric 
  acid 
  was 
  brought 
  near 
  them, 
  

   and 
  presented 
  all 
  the 
  properties 
  of 
  powerful 
  bases. 
  Exposed 
  in 
  the 
  anhydrous 
  

   state 
  to 
  a 
  mixture 
  of 
  snow 
  and 
  salt, 
  they 
  remain 
  perfectly 
  fluid, 
  but 
  if 
  a 
  small 
  

   quantity 
  of 
  water 
  be 
  added, 
  beautiful 
  white 
  crystals 
  of 
  a 
  hydrate 
  are 
  deposited. 
  

   I 
  attempted, 
  by 
  several 
  successive 
  distillations, 
  to 
  obtain 
  fixed 
  boiling 
  points 
  ; 
  but 
  

   the 
  quantity 
  I 
  had 
  to 
  work 
  with 
  was 
  too 
  small 
  for 
  an 
  operation 
  involving 
  so 
  much 
  

   loss 
  of 
  material, 
  and 
  I 
  therefore 
  converted 
  portions 
  of 
  the 
  fractions 
  which 
  I 
  had 
  

   reason 
  to 
  suspect 
  corresponded 
  with 
  particular 
  bases 
  into 
  platinum 
  salts. 
  I 
  

   selected, 
  in 
  the 
  first 
  place, 
  the 
  lowest 
  fraction 
  of 
  all, 
  that, 
  namely, 
  which 
  boiled 
  

   under 
  150°. 
  It 
  was 
  dissolved 
  in 
  water, 
  saturated 
  with 
  hydrochloric 
  acid, 
  and 
  

   evaporated 
  to 
  dryness 
  on 
  the 
  water-bath. 
  The 
  highly 
  crystalline 
  residue 
  obtained 
  

   was 
  dissolved 
  in 
  water, 
  and 
  mixed 
  with 
  a 
  solution 
  of 
  bichloride 
  of 
  platinum, 
  

   when 
  a 
  yellow 
  crystalline 
  salt 
  was 
  slowly 
  deposited, 
  which 
  dissolved 
  readily 
  in 
  

   water 
  even 
  in 
  the 
  cold, 
  and 
  still 
  more 
  abundantly 
  on 
  boiling 
  ; 
  and 
  the 
  solution 
  on 
  

   cooling 
  deposited 
  fine 
  golden 
  scales, 
  scarcely 
  to 
  be 
  distinguished 
  in 
  their 
  appear- 
  

   ance 
  from 
  those 
  of 
  methylamine 
  or 
  of 
  petinine. 
  These 
  crystals 
  were 
  separated, 
  

   and 
  as 
  the 
  salt 
  was 
  highly 
  soluble, 
  and 
  much 
  remained 
  in 
  the 
  mother 
  liquor, 
  

   a 
  mixture 
  of 
  alcohol 
  and 
  ether 
  was 
  added, 
  when 
  the 
  fluid 
  rapidly 
  filled 
  with 
  

   small 
  shining 
  scales. 
  The 
  analysis 
  of 
  this 
  salt 
  dried 
  at 
  21 
  2° 
  gave 
  the 
  following 
  

   results 
  : 
  — 
  

  

  {6-970 
  grains 
  of 
  platinochloride 
  gave 
  

   3-392 
  ... 
  of 
  carbonic 
  acid, 
  and 
  

   2-434 
  ... 
  of 
  water. 
  

  

  6-475 
  grains 
  of 
  the 
  salt 
  gave 
  2-422 
  grains 
  platinum. 
  

   8-257 
  ... 
  ... 
  3-047 
  

  

  100-00 
  

  

  

  Experiment. 
  

  

  13-27 
  

  

  Calculation. 
  

  

  

  Carbon, 
  

  

  13-57 
  

  

  c 
  6 
  

  

  36 
  

  

  Hydrogen, 
  . 
  

  

  3-88 
  

  

  3-77 
  

  

  H 
  10 
  

  

  10 
  

  

  Nitrogen, 
  

  

  

  5-27 
  

  

  N 
  

  

  14 
  

  

  Chlorine, 
  

  

  

  40-18 
  

  

  Cl 
  3 
  

  

  106-5 
  

  

  Platinum, 
  

  

  37-56 
  

  

  37-21 
  

  

  Pt 
  

  

  98-7 
  

  

  265-2 
  

  

  From 
  these 
  results 
  we 
  arrive 
  at 
  the 
  formula 
  C 
  6 
  H 
  9 
  N 
  HC1 
  Pt 
  Cl 
  2 
  , 
  which 
  is 
  that 
  

   of 
  the 
  platinum 
  salt 
  of 
  a 
  base 
  C 
  6 
  H 
  9 
  N. 
  The 
  base 
  is 
  therefore 
  the 
  substance 
  I 
  have 
  

  

  VOL. 
  XX. 
  PART 
  II. 
  3 
  y 
  

  

  