388 PHYSIOGRAPHY. CLASS ir. 



P f 11*7 2' ) 

 Simple forms, i - = {117 2')' ^ 4- oo (r) 



= 98 12'; ^! (5) ; (Pr + oo) 3 = 133 KX ; 



?r (w) = 98 12'; Pr + oo (T) * 



Char, of Comb. Henri-prismatic. 



p r _ i 

 Combinations. 1. __ ___ P + oo. Fig. 44. Ehren- 



. friedersdorf. Saxony. 



fc ^L'Tli. ?r+ oo. Pr+ oo. Fig. 46. Cornwall. 



Sg 



3. ^Tli iL^i. fr. P + QD. Pr+oo. 



2 2 



Fig. 49. 2^innwald, Bohemia. 



4. 5.1-1 Z. (^)!. P, - I. P + oo. 



2 2 2 2 



(Pr + oo) 5 . Pr + QD. Zinnwald. 

 Cleavage, Pr + oo, perfect. Fracture uneven. 



Surface, streaked parallel to the axis ; the rest 



p r _ | 



of the forms smooth, _ _ often curved. 



2 



Lustre metallic adamantine, or imperfect metallic. 



* Mr PHILLIPS gives the following angles: = 117 45 1 *, 



incidence of ^ on P 03 = 152 40'; on Pr + co = 117 22', 



P + co = 101 5', the inclination of P . co on P + co being 

 = 90. H. 



