72 
GRANITE. 
feldspar predominating. Indeed, feldspar forms by 
far the largest part of granite. 
Fig. 23. 
Figure 23 represents a 
section of graphic gran- 
ite transverse to the lam- 
inae. 
Figure 24 represents a sec- 
tion of graphic granite paral- 
lel to the laminae. 
Figure 25 represents Porphyriiic granite^ contain- 
ing large crystals of feldspar scattered through the 
Fig. 25. 
