PLATE XIII. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Apophyllite and Analcite on Datolite. Erie Cut, Bergen Hill, N. J. 
The apophyllite crystals in some cases appear to be sequent upon the 
analcite and certain of their faces are besprinkled with minute cubic 
crystals of pyrite, too small to be visible in the illustration. In a few 
cases similar sporadic cubes of pyrite occur on the analcite. Collected 
February 27, 190.9. 
Calcite sequent on Stilbite. Upper Montclair, N. J. 
The calcite crystals here commonly include stilbite, and stilbite is fre¬ 
quently sequent on the calcite. Collected, April 24, 1894. 
Pectolite sequent upon a plate of Prehnite. Woodcliff, N. J. 
Collected April 23, 1896. 
Pyrite in prisms and cubes on Heulandite. Shadyside, N. J. 
Photomicrograph. Magnified 3$ diameters. Collected August 5, 1893. 
