﻿48 
  

  

  Dr. 
  A. 
  C. 
  Crehore 
  on 
  the 
  Formation 
  of 
  the 
  

  

  Table 
  VI. 
  gives 
  the 
  volume 
  in 
  cub. 
  cm. 
  allotted 
  to 
  one 
  

   molecule 
  in 
  the 
  liquid 
  form 
  for 
  nine 
  different 
  substances, 
  and 
  

   the 
  data 
  from 
  which 
  the 
  information 
  is 
  derived. 
  The 
  number 
  

   of 
  molecules 
  in 
  a 
  cub. 
  cm. 
  of 
  gas 
  at 
  the 
  standard 
  pressure 
  and 
  

  

  Table 
  VI. 
  

  

  

  Density 
  

  

  Cub. 
  cm. 
  

  

  Density 
  

  

  Cub. 
  cm. 
  

   per 
  

  

  Cm. 
  

   per 
  

  

  

  referred 
  to 
  air. 
  

  

  per 
  gram. 
  

  

  to 
  water. 
  

  

  Molecule. 
  

  

  10 
  - 
  2i 
  

  

  Molecule. 
  

  

  10- 
  8 
  

  

  

  

  00014292 
  

  

  700- 
  

  

  114 
  

  

  46-4 
  

  

  3-595 
  

  

  H 
  

  

  0-00009004 
  

  

  11110- 
  

  

  0070 
  

  

  47-7 
  

  

  3-628 
  

  

  F 
  

  

  0-001697 
  

  

  590- 
  

  

  114 
  

  

  55-1 
  

  

  3-81 
  

  

  N 
  

  

  00012542 
  

  

  798- 
  

  

  0-810 
  

  

  57-4 
  

  

  3-86 
  

  

  

  

  

  0-854 
  

  

  54 
  4 
  

  

  3-79 
  

  

  A 
  

  

  0-001782 
  

  

  562- 
  

  

  1-3845 
  

  

  47-6 
  

  

  3-625 
  

  

  

  

  

  14233 
  

  

  462 
  

  

  3-59 
  

  

  Br 
  

  

  00071426 
  

  

  140-3 
  

  

  3-187 
  

  

  83- 
  

  

  4-37 
  

  

  

  

  

  315 
  

  

  84- 
  

  

  4-38 
  

  

  CI 
  

  

  0-0031066 
  

  

  316- 
  

  

  1-507 
  

  

  78- 
  

  

  4-27 
  

  

  Xe 
  

  

  0-005717 
  

  

  175- 
  

  

  352 
  

  

  60-1 
  

  

  3-92 
  

  

  H 
  o 
  ... 
  

  

  0-000581 
  

  

  1723- 
  

  

  100 
  

  

  29 
  3 
  

  

  308 
  

  

  temperature 
  is 
  taken 
  as 
  2*7 
  x 
  10 
  19 
  . 
  The 
  last 
  column 
  gives 
  

   the 
  average 
  distance 
  from 
  the 
  centre 
  of 
  one 
  to 
  the 
  centre 
  of 
  

   the 
  adjacent 
  molecule 
  in 
  cms. 
  These 
  figures 
  are 
  surprisingly 
  

   near 
  to 
  equality, 
  much 
  nearer 
  than 
  they 
  would 
  be 
  were 
  the 
  

   space 
  proportional 
  to 
  the 
  size 
  of 
  the 
  atoms 
  composing 
  the 
  

   substance. 
  If 
  the 
  diatomic 
  molecule 
  is 
  formed 
  in 
  the 
  manner 
  

   indicated 
  by 
  the 
  equations, 
  it 
  would 
  be 
  unreasonable 
  to 
  suppose 
  

   that 
  any 
  atoms 
  in 
  the 
  adjacent 
  molecules 
  of 
  a 
  solid 
  could 
  be 
  

   nearer 
  together 
  than 
  the 
  two 
  atoms 
  of 
  the 
  molecule 
  itself. 
  

   The 
  space 
  allotted 
  to 
  one 
  molecule 
  in 
  these 
  substances 
  agrees 
  

   well 
  with 
  the 
  conception 
  that 
  each 
  molecule 
  is 
  of 
  the 
  same 
  

   order 
  of 
  magnitude 
  as 
  any 
  other. 
  How 
  much 
  of 
  this 
  distance 
  

   between 
  adjacent 
  molecules 
  is 
  interspace, 
  and 
  how 
  much 
  is 
  

   occupied 
  by 
  the 
  molecule, 
  as 
  well 
  as 
  the 
  relative 
  sizes 
  of 
  the 
  

   atom 
  and 
  molecule, 
  is 
  most 
  important 
  to 
  determine. 
  

  

  Before 
  entering 
  upon 
  this 
  question, 
  some 
  consideration 
  will 
  

   be 
  given 
  to 
  the 
  manner 
  in 
  which 
  more 
  than 
  two 
  atoms 
  may 
  

   combine 
  to 
  form 
  the 
  molecules 
  of 
  compounds. 
  The 
  curves 
  

   of 
  zero 
  force 
  shown 
  in 
  fig. 
  8 
  are 
  independent 
  of 
  any 
  assump- 
  

   tion 
  as 
  to 
  the 
  speed 
  of 
  the 
  electrons 
  within 
  the 
  atoms. 
  

  

  