PHYSIOGRAPHY. 



Yellow Lead-Ore. 



285 



Secondary forms, 

 i. 



Primary with the sum- 

 mits truncated. 



The same as 1. with the angles 

 of the base truncated. 



The same, with the edges 

 of the base truncated. 



Right square prism. 



5. Fig. 486. 



Annaberg, Austria. 



7. Fig. 48g. 



Bleiberg, Carinthia. 



Bleiberg, Carinthia. 



1. (base. H.) 2. (sexoctonal. H.) 3. (epointe. H.) 

 1. (bisunitaire. H.) 5. b on 6=99 40'. 6. c on c 

 = 128 9'. 7. d on d =118 26', e on e =106 44'. 



Cleavage parallel to b very smooth, but often interrupted 

 by conchoidal fracture : parallel to P and a less distinct, 

 and not observable in every individual. Fracture con- 

 choidal, generally imperfect. Surface a and particularly 

 J, smooth \ a sometimes striated parallel to the edges of 



