﻿64 
  PRIMEVAL 
  MAN. 
  

  

  found 
  to 
  exist 
  between 
  the 
  lowest 
  and 
  the 
  

   highest 
  human 
  brain, 
  because 
  the 
  fact 
  with 
  

   which 
  we 
  have 
  to 
  deal 
  is 
  this, 
  that 
  a 
  certain 
  

   minimum 
  quantity 
  of 
  that 
  mysterious 
  sub- 
  

   stance 
  is 
  constantly 
  and 
  uniformly 
  associated 
  

   with 
  all 
  the 
  other 
  anatomical 
  peculiarities 
  

   of 
  Man. 
  Below 
  that 
  minimum 
  the 
  whole 
  

   accompanying 
  structure 
  undergoes 
  far 
  more 
  

   than 
  a 
  corresponding 
  change, 
  — 
  even 
  the 
  whole 
  

   change 
  between 
  the 
  lowest 
  Savage 
  and 
  the 
  

   highest 
  Ape. 
  Above 
  that 
  minimum, 
  all 
  

   subsequent 
  variations 
  in 
  quantity 
  are 
  accom- 
  

   panied 
  by 
  no 
  changes 
  whatever 
  in 
  physical 
  

   structure. 
  In 
  placing, 
  therefore, 
  a 
  high 
  value 
  

   — 
  a 
  value 
  in 
  classification 
  of 
  Order, 
  or 
  even 
  

   of 
  Class 
  — 
  upon 
  the 
  eleven 
  cubic 
  inches 
  of 
  

   brain-space 
  which 
  lie 
  between 
  the 
  Hindu 
  and 
  

  

  