Oq C/q 
i. 
■VYhite. —Petrography of the Boston Basin. 
PLATE 4. 
. 12. Hornblende granitite. Weymouth Fore River. Slide 87, X 144. 
. 13. Conglomerate. Near North Common Hill quarries, Quincy, Mass. 
Slide 212, X 144. 
