﻿PLATE 
  IV 
  

  

  To 
  face 
  p. 
  125. 
  

  

  J. 
  N, 
  Nevius, 
  photo. 
  

  

  Exposure 
  of 
  Gneiss 
  at 
  the 
  Talc 
  Mines 
  and 
  Entrance 
  to 
  an 
  Abandoned 
  

  

  Open 
  Mine. 
  Talcville. 
  

  

  