292 



PHYSIOGRAPHY. 



Zircon. 



Fig. 494. 



x^ 

 J? 



Buncombe GA. (N. C.) 



Fig. 496. 



Middlebury, (Vt.) 

 Munroe, (N. Y.) 



Fig. 495. 



Middlebury, (Vt.) 



Fig. 490. The primary, having the angles of the base 

 truncated. P on s =117 48'. (dodecaedre. H.) Fig. 

 491. The primary having the edges of the base truncated. 



