BULL. DEPT. GLOL. UNIV. CAL, 



VOL. 4, PL. 



Fig. 1. 



Hornblende schist from Yum- Yum Lake, Canada. End section. 



Fig. 2. 



Glaueophane schist from Berkeley. End section. 



Fig. 3. 



Fort Wrangell mica schist. Parallel to A (y of text fig. 10). 



