BULL. GEOL. SOC. AM. 



VOL. 17, 1905, PL. 71 



Figure 1. — Pegmatite Dike 

 Cutting blue granite in Davis quarries, 3 miles north of Fredericksburg, Virginia 



Figure 2. — Pegmatite Veins cutting Granite, Donald Quarry, west of Richmond 

 PEGMATITE DIKES AND VEINS 



