﻿FIG. 
  7. 
  

  

  To 
  face 
  p. 
  36. 
  

  

  T. 
  G. 
  White, 
  photo. 
  

  

  Frankfort 
  Slates 
  at 
  Falls 
  op 
  West 
  Branch 
  of 
  Ferguson 
  Creek. 
  

  

  