VOL. II. PLATE VIII. 



FIG. 42. Prismatic Iron-pyrites. 



Pr. P+oo. Pr + cx>, {Pr} {Pr}. 



M I P 



FIG. 43. Prismatic Iron-pyrites. 



Pr. Pr. 



g M I P 



FIG. 44. Diatomous Kouphone-spar. 



P M 



FIG. 45, Hemi-prismatic Natron-salt. 



. (Pr 4- oo) 3 . Pr + oo. 



P M I 



FIG. 46. Prismatic Cobalt-mica. 



Pr 



_. Pr -f x. Pr -f oo. 



M T P 



FIG. 47. Prismatic Titanium-ore. 

 Pr P Pr 



P r 



