122 PHYSIOGRAPHY. 



(? + x) 4 = 43 42'; () 5 = 44 56'*; 

 (P+x) 6 =250'; (P) 8 =28 59'*; (Pr I) 5 

 (y) = 113 44', 128 1', 88 57', (?r) 3 = 91 

 55'*; (Pr + x) 3 ((2) = 77 27' ; Pr 1 = 

 116 53'; Pr (Jf) = 78 18'; f Pr + 1 (t) 

 = 56 5& ; Pr + 1 rr 44 18' ; Pr + oo (*) ; 

 f r (o) = 105 6' ; f r + oo (P). 



Char, of Comb. Prismatic. 



Combinations. 1. Pr. Pr + GD. Felsobanya, 

 Hungary. 



2. Pr. (?r + oo) 3 . f r -f oo. Sim. Fig. 8. 

 Mies, Bohemia. 



3. ?r. (Pr + oo) 3 . ?r -|- . Sim. Fig. 9. 

 Freiberg, Saxony. 



4. ?r. Pr. P. (Pr + OD) 5 . Pr + op. Fig. 

 21. Roya, Auvergne. 



5. P GD. Pr. Pr. P. (Pr+oo) 3 . Pr+x. 

 Przibram, Bohemia. 



6. P oo. Pr. (Pr 1) 3 . Pr. P. P + oo. 

 (Pr-fx) 3 . (P+oo) 4 . (P-f oo) 6 . Pr + x. 

 Dufton, Westmoreland. 



Cleavage. Pr and Pr -f- x perfect. The latter 

 commonly more easily obtained, the first some- 

 times interrupted. P x is less distinct, still 

 less so Pr + x. There are sometimes traces of 

 P and (Pr + x) 3 . Fracture conchoidal, seldom 

 observable. Surface in a few examples only, 

 faintly streaked. The same faces, which in cer- 



damental form. The faces of (I s 2) 4 appear as truncations 

 of the edges between y and P. H. 



