BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 2, pp. 365-382, PL. 14 



ON THE RECOGNITION OF THE ANGLES OF CRYSTALS IN 



THIN SECTIONS 



ALFKED C. LANE 



XTr; 



roCT 15 -»0 



ROCHESTER 



PUBLISHED BY THE SOCIETY 



May, 1891 



