VOL. II. PLATE XXVII. 



FIG. 144. Axotomous Iron -ore. 



R oo. R . 1. R. R+l. 



r 2 



a c # b d 



FIG. 145. Rhombohedral Quartz. 



P. R. P + OB. R. P. 

 P,* s r,r' s' *,P 



FIG. 146. Rhombohedral Quartz. 



P. R. .(>. Iff) 5 . (9 



r 2 r 2 r "2 



T?' " + 



^ r,/ 



FIG. 147. Rhombohedral Quartz. 



p +E __r_(P)f J_(P)J J^(P) 3 J_(P) V 

 * * 2 * _ 1 2 ' 12 ' 1 g 



X y u 



. p+2. 



i_ff>. 5 IP. . 



1 2 2 



v b mar d 



FIG. 148. Rhombohedral Fluor-haloide. 



R oo. 2 (R . 1). P. 2 (R). 

 P a x s 



p+i 



r 2 r 2 



* u c 



R -I- x. P -i- oo. 



e M 



FIG. 149. Rhombohedral Fluor-haloide. 



R oo. P 1. 2(11 1). P. 

 P r ax 



P + i. 



r 



