490 



MEASUREMENTS OF CRYSTALS. 



HORNBLENDE. (Continued.) 



Fig. 245. 



P on 152O30' 



Fig. 246. 



X onz 118028' 



Fig. 248. 



P on I 164049' 



(The remaining measurements will be 

 found on page 488.) 



ARF'VVEDSONITE. Fig. 251. Page 309. 

 Fig. 251. The primary, an oblique rhom- 

 bic prism ? 

 M onM' 1230.55' 



CORUNDUM. Figs. 252 to 254 inclusive. Page 

 314. 



Fig. 252. The primary, a rhombohedron. 



P onP' 93054' 



Fig. 253, a secondary form of the same 

 mineral. 



