﻿PLATE 
  V. 
  

  

  F. 
  J. 
  H. 
  Merrill, 
  Fhcto. 
  

  

  Sheared 
  granite 
  (Yonkers' 
  Gneiss), 
  Hastings, 
  N. 
  Y. 
  

   Photomicrograph 
  in 
  polarized 
  light, 
  enlargement 
  22 
  diameters. 
  

  

  