Rass 
/ Quarts 
Glass frelusvione 
@? 
a 
Live Ground 
cane 
persst 
X 26 X26 X 400 
Portion of Fig ro further 
entlargect 
so 
edh Flomuge 
xy 
xX 22 
Pigs.1tol2 guartz-porphynes; Frys s3tovs felsttes; for localities see page Xter. 
7 guarts porphyr ° iz e pag | 
Peg. 9 hancl SpEecz mer, reflected leght; Begs. Ji andiwin polarezed fg Rt, alt other frgures v7 
ordinary leght 
