﻿Aepinus 
  Atomized. 
  279 
  

  

  exist. 
  To 
  see 
  that 
  it 
  has 
  octo-polar 
  electric 
  quality, 
  consider 
  

   an 
  octahedron 
  built 
  up 
  accord 
  i 
  no- 
  to 
  it. 
  The 
  faces 
  of 
  this 
  

   octahedron, 
  taken 
  in 
  proper 
  order, 
  will 
  have, 
  next 
  to 
  them, 
  

   alternately 
  points 
  and 
  triangular 
  faces 
  of 
  the 
  electrionic 
  

   quartets 
  within 
  the 
  atoms. 
  This 
  itself 
  is 
  the 
  kind 
  of 
  electric 
  

   reolotropy 
  which 
  constitutes 
  octo-polar 
  quality. 
  Time 
  pre- 
  

   vents 
  entering 
  fully 
  at 
  present 
  on 
  any 
  dynamical 
  investigation 
  

   of 
  static 
  or 
  kinetic 
  results. 
  

  

  § 
  39. 
  [Added 
  Oct. 
  23.] 
  Since 
  what 
  precedes 
  was 
  written, 
  

   I 
  have 
  seen 
  the 
  explanation 
  of 
  a 
  difficulty 
  which 
  had 
  pre- 
  

   vented 
  me 
  from 
  finding 
  what 
  was 
  wanted 
  for 
  octo-polar 
  

   electric 
  a^olotropy 
  in 
  a 
  homogeneous 
  assemblage 
  of 
  single 
  

   atoms. 
  I 
  now 
  find 
  (§ 
  40 
  below) 
  that 
  quartets 
  of 
  electrions 
  

   will 
  rest 
  stably 
  in 
  equilibrium, 
  under 
  the 
  influence 
  of 
  the 
  

   mutual 
  repulsion 
  between 
  electrion 
  and 
  electrion 
  and 
  attraction 
  

   between 
  atom 
  and 
  electrion, 
  in 
  an 
  equilateral 
  homogeneous 
  

   assemblage 
  in 
  the 
  configuration 
  indicated 
  in 
  fig. 
  7. 
  The 
  

  

  Fi<?. 
  7. 
  

  

  quartets 
  of 
  electrions 
  are 
  supposed 
  to 
  have 
  their 
  edges 
  parallel 
  

   to 
  the 
  six 
  lines 
  of 
  symmetry 
  of 
  the 
  assemblage. 
  The 
  plane 
  

   of 
  the 
  paper 
  is 
  supposed 
  to 
  be 
  that 
  of 
  the 
  centres 
  of 
  the 
  seven 
  

   atoms. 
  The 
  central 
  point 
  in 
  each 
  circle 
  represents 
  a 
  simple 
  

   electrion 
  which 
  is 
  at 
  distance 
  r, 
  according 
  to 
  the 
  notation 
  of 
  

   § 
  20 
  above, 
  from 
  the 
  plane 
  of 
  the 
  paper 
  on 
  the 
  near 
  side 
  ; 
  and 
  

   therefore 
  the 
  other 
  three 
  are 
  at 
  the 
  corners 
  of 
  an 
  equilateral 
  

  

  triangle 
  at 
  distance 
  .y 
  r 
  on 
  the 
  far 
  side 
  to 
  make 
  the 
  electric 
  

  

  o 
  

   centre 
  of 
  gravity 
  of 
  the 
  quartet 
  coincide 
  with 
  the 
  centre 
  of 
  

   its 
  atom. 
  The 
  radius 
  of 
  circle 
  on 
  which 
  these 
  three 
  lie 
  is 
  

  

  -tt— 
  r 
  or 
  -94?'. 
  The 
  diagram 
  is 
  drawn 
  correctly 
  to 
  scale 
  

  

  