138 PHYSIOGRAPHY. CLASS H. 



= 56 7; (Pr + oo)* r=12940'*; 



Pr 

 - 



V ; Pr + 1 (y) = 58 3',; fr -f QD fe). 

 Char, of Comb. Hemi-prismatic. Inclination of 



P oo on Pr + x = 102 20', of P oo on 



P + oo = 99 11'. 

 Combinations. 1. ^. P+ oo. (r+ oo) 4 . HAUY. 



2. |. --- 



Fig. 5S. 

 ?. Pr. Pr + 1. -L r . -L - 



P + x. (Pr + oo) 3 . Pr + 00. Pr + oo. 



Fig. 170. f All of them from Beresof. 



Cleavage. P + CD, pretty easily observable, ?r -f- oo 



and Pr -f- oo indistinct. None of them perfect. 



Fracture small conchoidal, uneven. Surface, the 



prisms parallel the axis streaked in the direction of 



* Four-sided prisms of C4 36' and of 120 41' are quoted 

 by Messrs HAUY and SORET. They are represented by. the 

 ns (r + co)< and (Pr + w). H. 

 -t- In the cabinet of Mr ALLAX. H. 



