﻿70 
  

  

  Mr. 
  Gervaise 
  Le 
  Bas 
  on 
  

   Table 
  VII. 
  

  

  Comparison 
  between 
  the 
  Values 
  of 
  ~ 
  for 
  the 
  Paraffins 
  

  

  a 
  T 
  - 
  

  

  and 
  the 
  Olefines 
  under 
  similar 
  circumstances. 
  

  

  T. 
  

  

  C 
  12 
  H 
  2C 
  

  

  C 
  12 
  H 
  2 
  ,|=i 
  

  

  C14H30 
  

  

  C 
  U 
  H 
  28 
  | 
  = 
  | 
  

  

  C 
  16 
  H 
  34 
  

  

  C 
  ]0 
  H 
  3 
  2 
  =| 
  

  

  18 
  H 
  3U 
  

  

  M 
  Hg 
  e 
  |=| 
  

  

  M.P 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1-0000 
  

  

  1 
  0000 
  

  

  „ 
  +10° 
  

  

  0-9913 
  

  

  0-9910 
  

  

  0-9911 
  

  

  0-9911 
  

  

  0-9913 
  

  

  0-9914 
  

  

  0-9913 
  

  

  9913 
  

  

  „ 
  +20° 
  

  

  0-9824 
  

  

  0-9819 
  

  

  0-9822 
  

  

  0-9822 
  

  

  9826 
  

  

  0-9827 
  

  

  0-9826 
  

  

  0-9826 
  

  

  ,. 
  +30° 
  

  

  09735 
  

  

  09730 
  

  

  0-9732 
  

  

  0-9732 
  

  

  09738 
  

  

  0-9739 
  

  

  0-9738 
  

  

  09738 
  

  

  „ 
  +40° 
  

  

  0-9644 
  

  

  0-9636 
  

  

  0-9642 
  

  

  0-9642 
  

  

  

  

  

  

  „ 
  +50° 
  

  

  09f52 
  

  

  0-9544 
  

  

  0-9556 
  

  

  09556 
  

  

  

  

  

  

  „ 
  +go° 
  

  

  0-9459 
  

  

  0-9452 
  

  

  

  

  

  

  

  

  „ 
  +70° 
  

  

  0-9368 
  

  

  0-9360 
  

  

  

  

  

  

  

  

  The 
  conclusion 
  is 
  that 
  : 
  

  

  the 
  specific 
  gravities 
  of 
  the 
  olefines 
  C„H 
  2 
  „ 
  \ 
  = 
  \ 
  at 
  equal 
  intervals 
  

   of 
  temperature 
  from 
  the 
  melting-points 
  are 
  equal 
  fractions 
  of 
  

   their 
  specific 
  gravities 
  at 
  those 
  points. 
  

  

  (b) 
  The 
  Acetylene 
  Hydrocarbons, 
  G 
  n 
  Ho»-2 
  :=|. 
  

  

  The 
  data 
  for 
  the 
  acetylenes 
  are 
  those 
  of 
  Krafft 
  (Ber. 
  1887, 
  

   xvii. 
  p. 
  1371), 
  and 
  are 
  for 
  the 
  liquid 
  state 
  at 
  the 
  melting-point. 
  

  

  Table 
  VIII. 
  

   The 
  Volume 
  relations 
  of 
  the 
  Acetylenes 
  at 
  the 
  M.P. 
  

  

  No. 
  

  

  Acetylene, 
  C 
  ?? 
  H2»-2 
  | 
  = 
  | 
  . 
  

  

  w. 
  

  

  V 
  (obs.). 
  

  

  205-0 
  

   240-5 
  

   276-1 
  

   3L482 
  

  

  A. 
  

  

  35-5 
  

   35 
  

   35-6 
  

  

  35-6 
  

  

  ws. 
  

  

  2079 
  

   248-54 
  

   27918 
  

   314-82 
  

  

  WS-8. 
  W 
  v 
  "'. 
  

  

  204-9 
  2H71 
  

   240-54 
  2-970 
  

   27618 
  2970 
  

   311*82 
  2-970 
  

  

  1. 
  

   2. 
  

   3. 
  

  

  4. 
  

  

  Dodecylidene, 
  C 
  12 
  B" 
  22 
  | 
  | 
  ... 
  

  

  Tetradecylidene, 
  C 
  14 
  H 
  2fl 
  | 
  | 
  ... 
  

   Hexadecylidene, 
  C 
  16 
  H 
  8S 
  | 
  : 
  | 
  ... 
  

   Octadecylidene, 
  O 
  w 
  H 
  3Q 
  \ 
  | 
  ... 
  

  

  70 
  

  

  82 
  

  

  94 
  

  

  106 
  

  

  

  Menu 
  values... 
  

  

  

  The 
  calculated 
  molecula 
  

  

  r 
  v 
  

  

  riumes 
  : 
  

  

  ire 
  

  

  866*0 
  tO 
  

  

  be 
  in 
  ex- 
  

  

  cellent 
  agreement 
  with 
  the 
  ol 
  

  

  >serve< 
  

  

  lues, 
  and 
  the 
  ratio 
  

  

  