﻿6 
  Mixter 
  — 
  Products 
  of 
  the 
  Explosion 
  of 
  Acetyl 
  

  

  ene. 
  

  

  the 
  bomb, 
  and 
  adhering 
  rather 
  firmly 
  to 
  the 
  metal. 
  A 
  faint 
  

   odor 
  of 
  hydrocyanic 
  acid 
  was 
  perceived 
  on 
  opening 
  the 
  bomb, 
  

   but 
  no 
  satisfactory 
  reaction 
  was 
  obtained 
  for 
  it. 
  The 
  wooden 
  

   insulator 
  was 
  slightly 
  browned. 
  It 
  is* 
  not 
  probable 
  that 
  any 
  

   acetylene 
  was 
  formed 
  from 
  the 
  wood, 
  as 
  it 
  yields, 
  when 
  heated, 
  

   chiefly 
  hydrogen 
  and 
  methane. 
  

  

  Experiment 
  30. 
  — 
  Gas, 
  96 
  per 
  cent 
  of 
  acetylene 
  ; 
  pressure, 
  3 
  

   atmospheres 
  ; 
  4*1 
  per 
  cent 
  of 
  acetylene 
  was 
  found 
  in 
  the 
  gas 
  

   after 
  the 
  explosion. 
  The 
  odor 
  of 
  hydrocyanic 
  acid 
  was 
  strong. 
  

   The 
  residual 
  gas 
  was 
  passed 
  through 
  a 
  solution 
  of 
  potassium 
  

   hydroxide 
  free 
  from 
  cyanide. 
  To 
  a 
  portion 
  of 
  the 
  solution 
  

   ferrous-ferric 
  sulphate 
  was 
  added, 
  and 
  the 
  mixture 
  was 
  warmed 
  

   and 
  then 
  cooled. 
  On 
  adding 
  to 
  it 
  an 
  excess 
  of 
  hydrochloric 
  

   acid 
  an 
  abundant 
  precipitate 
  of 
  Prussian 
  blue 
  formed. 
  If 
  the 
  

   gas 
  contained 
  cyanogen, 
  this 
  would 
  have 
  formed 
  with 
  potas- 
  

   sium 
  hydroxide, 
  cyanide 
  and 
  cyanate. 
  The 
  latter 
  is 
  converted 
  

   into 
  an 
  ammonium 
  salt 
  on 
  adding 
  an 
  acid. 
  A 
  test 
  did 
  not 
  

   yield 
  any 
  ammonia, 
  but 
  the 
  negative 
  result 
  is 
  not 
  in 
  this 
  one 
  

   test 
  to 
  be 
  regarded 
  as 
  proof 
  of 
  the 
  absence 
  of 
  cyanogen. 
  

  

  In 
  the 
  explosions 
  in 
  the 
  U- 
  tubes 
  the 
  gas 
  expanded, 
  often 
  to 
  

   twice 
  or 
  thrice 
  the 
  original 
  volume, 
  thus 
  allowing 
  the 
  products 
  

   ^ 
  of 
  the 
  explosion 
  to 
  cool 
  more 
  rapidly 
  than 
  when 
  

  

  the 
  volume 
  is 
  not 
  changed 
  at 
  the 
  instant 
  of 
  the 
  

   explosion. 
  In 
  order 
  to 
  imitate 
  to 
  some 
  extent 
  

   the 
  conditions 
  in 
  the 
  explosions 
  in 
  the 
  U-tubes, 
  

   the 
  plug 
  of 
  the 
  bomb 
  was 
  replaced 
  by 
  the 
  check 
  

   valve, 
  fig. 
  7. 
  This 
  was 
  designed 
  to 
  close 
  the 
  

   opening 
  after 
  the 
  gas 
  ceased 
  to 
  escape 
  and 
  thus 
  

   prevent 
  air 
  from 
  entering 
  the 
  bomb. 
  It 
  was 
  

   also 
  sealed 
  promptly 
  with 
  wax. 
  A 
  small 
  plati- 
  

   num 
  wire 
  for 
  an 
  electrode 
  was 
  fastened 
  in 
  the 
  

   opening 
  a 
  with 
  a 
  bit 
  of 
  pyroxylene 
  and 
  a 
  few 
  

   milligrams 
  of 
  beeswax 
  was 
  melted 
  into 
  it. 
  The 
  

   4 
  mm 
  hole 
  in 
  the 
  last 
  experiment 
  was 
  too 
  large 
  to 
  

   close 
  in 
  this 
  way, 
  hence 
  it 
  was 
  plugged 
  with 
  a 
  

   bit 
  of 
  glass 
  tubing 
  holding 
  the 
  electrode. 
  No 
  

   wax 
  was 
  exposed 
  to 
  the 
  gases 
  in 
  the 
  bomb. 
  The 
  

   glass 
  broke 
  promptly 
  when 
  the 
  explosion 
  oc- 
  

   curred. 
  In 
  Experiments 
  31 
  and 
  32 
  an 
  insulator 
  

   made 
  of 
  glazed 
  clay 
  pipe 
  stem 
  was 
  used. 
  It 
  was 
  

   cracked 
  by 
  two 
  explosions 
  so 
  that 
  it 
  ceased 
  to 
  

   insulate. 
  In 
  the 
  remaining 
  experiments 
  glass 
  

   insulators 
  made 
  of 
  heavy 
  barometer 
  tubing 
  were 
  

   used. 
  The 
  portion 
  of 
  the 
  glass 
  in 
  the 
  bomb 
  was 
  cracked 
  as 
  if 
  

   dipped 
  when 
  hot 
  into 
  water. 
  

  

  Experiment 
  31. 
  — 
  Gas, 
  99 
  per 
  cent 
  of 
  acetylene; 
  pressure, 
  3 
  

   atmospheres 
  ; 
  hole, 
  ri 
  mra 
  in 
  diameter. 
  Gas 
  and 
  carbon 
  escaped 
  

  

  