The Amkrica.n Geologist, Vol. XXVII. 
Plate XX. 
Plate XX. Figure i. Photomicrograph of dark-elue-gray Grax- 
ITE NEAR OdESSADALE, MeRIWETHER COUNTY, GEORGIA. CROSSED 
NICOLS X74. 
Pr.ATE XX. Figure 2 PiioTOMicROGRAni of the Stone mountain 
LIGHT-GRAY GRANITE. StONE MOUNTAIN, DeKaLB COUNTY, GEORGIA. 
Crossed nicols X74. 
