﻿2 
  Mixter 
  — 
  Products 
  of 
  the 
  Explosion 
  of 
  Acetylene. 
  

  

  the 
  electrodes. 
  The 
  flash 
  at 
  the 
  time 
  of 
  the 
  puff 
  or 
  explosion 
  

   was 
  reflected 
  from 
  the 
  upper 
  part 
  of 
  d 
  and 
  the 
  increased 
  pres- 
  

   sure 
  was 
  indicated 
  by 
  the 
  change 
  in 
  the 
  position 
  of 
  the 
  mer- 
  

   cury 
  in 
  a. 
  In 
  no 
  instance 
  was 
  the 
  explosion 
  violent, 
  nor 
  did 
  

   the 
  decomposition 
  of 
  the 
  acetylene 
  extend 
  into 
  the 
  narrow 
  

   tubes. 
  The 
  hydrogen 
  remaining 
  after 
  absorbing 
  acetylene 
  

   with 
  ammoniacal 
  cuprous 
  chloride 
  was 
  the 
  measure 
  of 
  the 
  

   acetylene 
  decomposed. 
  The 
  difference 
  between 
  the 
  volume 
  

   of 
  acetylene 
  taken 
  and 
  the 
  volume 
  of 
  the 
  gas 
  after 
  explosion 
  

   was 
  considered 
  as 
  the 
  measure 
  of 
  the 
  acetylene 
  which 
  had 
  been 
  

   converted 
  into 
  condensation 
  products. 
  The 
  results 
  are 
  given 
  

   in 
  parts 
  of 
  100 
  volumes 
  of 
  the 
  gas 
  taken. 
  

  

  Temperature 
  Acetylene 
  Acetylene 
  in 
  

  

  No. 
  of 
  Diameter 
  before 
  decom- 
  Acetylene 
  residual 
  

  

  Exp. 
  of 
  tube. 
  sparking. 
  posed. 
  condeused. 
  gas. 
  

  

  1 
  12 
  mm 
  325° 
  7 
  

  

  2 
  " 
  325° 
  8 
  

  

  3 
  " 
  " 
  330° 
  25 
  

  

  4 
  " 
  335° 
  30 
  

  

  5 
  J3 
  mm 
  340° 
  50 
  

  

  6 
  12 
  ram 
  345° 
  56 
  

  

  7 
  " 
  345° 
  50 
  

  

  8 
  " 
  356° 
  80 
  

  

  9 
  li 
  mm 
  365° 
  50 
  

  

  10 
  " 
  above 
  365° 
  50 
  20 
  30 
  

  

  11 
  15 
  mm 
  350° 
  70 
  6 
  24 
  

  

  12 
  " 
  above 
  400°? 
  50 
  10 
  40 
  

  

  13 
  " 
  347° 
  61 
  17 
  22 
  

  

  14 
  " 
  447° 
  50 
  20 
  30 
  

  

  15 
  " 
  478° 
  10? 
  40 
  50 
  

  

  At 
  the 
  highest 
  temperatures 
  given 
  in 
  the 
  above 
  table 
  acety- 
  

   lene 
  forms 
  condensation 
  products, 
  but 
  too 
  slowly 
  to 
  interfere 
  

   with 
  the 
  results. 
  When 
  the 
  gas 
  was 
  heated 
  for 
  an 
  hour 
  and 
  a 
  

   half 
  to 
  the 
  highest 
  temperature 
  attainable 
  by 
  the 
  furnace, 
  

   probably 
  about 
  500°, 
  a 
  black 
  coating 
  formed 
  on 
  the 
  platinum 
  

   wires 
  in 
  the 
  tube 
  and 
  a 
  starry 
  deposit 
  on 
  the 
  glass, 
  and 
  the 
  gas 
  

   remaining 
  was 
  two-thirds 
  the 
  original 
  volume. 
  The 
  tempera- 
  

   tures 
  in 
  the 
  last 
  three 
  tests 
  were 
  obtained 
  with 
  an 
  air 
  thermom- 
  

   eter.* 
  In 
  Experiment 
  15 
  there 
  was 
  no 
  explosion 
  ; 
  perhaps 
  the 
  

  

  * 
  The 
  air 
  thermometer 
  was 
  made 
  about 
  the 
  same 
  capacity 
  and 
  out 
  of 
  the 
  same 
  

   piece 
  of 
  glass 
  tubing 
  as 
  the 
  apparatus 
  holding 
  the 
  acetylene. 
  Its 
  capacity 
  in 
  grams 
  

   of 
  water 
  was 
  found 
  and 
  then 
  it 
  was 
  filled 
  with 
  dry 
  air, 
  fastened 
  to 
  the 
  acetylene 
  

   tube 
  and 
  both 
  tubes 
  were 
  hung 
  in 
  the 
  furnace. 
  Just 
  before 
  sparks 
  were 
  passed 
  

   through 
  the 
  acetylene 
  the 
  air 
  thermometer 
  was 
  sealed. 
  When 
  cold 
  it 
  was 
  opened 
  

   under 
  water 
  of 
  known 
  temperature, 
  closed 
  again, 
  wiped 
  dry 
  and 
  weighed. 
  The 
  

   data 
  for 
  finding 
  the 
  temperature 
  were 
  the 
  volume 
  and 
  temperature 
  of 
  the 
  air 
  in 
  

   the 
  tube 
  before 
  and 
  after 
  heating. 
  The 
  temperature 
  of 
  347° 
  obtained 
  in 
  13 
  

   accorded 
  fairly 
  well 
  with 
  that 
  given 
  by 
  the 
  mercurial 
  thermometer 
  hung 
  in 
  the 
  

   furnace 
  with 
  the 
  air 
  thermometer. 
  

  

  