Phil. Mag. Ser. 6, Vol 8, Pl. VIII 
Fra. 9.—Cale-spar etched after rubbing. Fie. 10.—Antimony with emery furrows. 
Transmitted light. x 215. Normal light.  X 775. 
Fie. 11.—The same polished across the Fie. 12.—Surface film partly removed by 
furrows and ridges, surface film etching. Normal ght. x 775. 
spreading over these. Normal 
light. Xx 775. 
meer : TE Rane aa 
| | : 
EP | 
Q 
ie 
p 
Fig. 13.—The same with pits covered by Fic. 14.—The same, large pit beg covered 
surface film. Normallight. x 775. by surface film. Normal light. x 778. 
