VOL. II. PLATE XXI. 

 FIG, 112, Rhombohedral Fluor-haloide. 



R .QD. Pl. P + 0>. 



P r M 



FIG. 113. Rhombohedral Lime-haloide. 



R oo. R+2. 



o m 



FrG. 114. Rhombohedral Lime-haloide. 

 R. R + oo. 

 P c 



FIG. 115. Rhombohedral Lime-haloide. 

 R oo. R. R + 2. 

 o P m 



FIG. 116. Rhombohedral Lime-haloide. 



R. (P) 5 . (P) 5 . R + 2. R-f-oo. 

 P r y m c 



FIG. 117. Rhombohedral Lead-baryte. 

 P. P + oo. 

 P y s n, n' 



