274 



PHYSIOGRAPHY. 



White Lead-Ore. 



Fig. 477. 



M 



M 



Fig. 478. 



u 7 



M 



Fig. 480. 



Fig. 474. Primary, having the acute angles deeply trun- 

 cated, x on # = 127 20'. (octaedre. H.) Fig. 475. Pri- 

 mary, having the acute angles replaced by single planes, 

 and the acute lateral edges truncated. / on w = H4 44 X , 



