﻿PLATE 
  II. 
  

  

  :P. 
  J. 
  H. 
  Merrill, 
  Photo. 
  

  

  Precambrian 
  granite, 
  King's 
  quarry 
  near 
  Garrisons, 
  N. 
  Y. 
  

   Photomicrograph 
  in 
  polarized 
  light, 
  enlargement 
  22 
  diameters. 
  

  

  