253 PHYSIOGRAPHY. CLASS 11. 



a : b : c : d = 1 : ^4-419 z V 3-1C8 : 0. 



Simple forms. Z (s) = 126 12'; -~ l?- 1 ^ (ra) ; 

 (Pr + OD)' (T, 1) = 118 52' ; (Pr + oo)' '(, *>) 



Char, of Comb. Hemi-prismatic. 



x^ 



Combinations. 1. _. (fr+cx) 5 . Sim. Fig. 



44-., reversed. St Gothard, Switzerland. 

 g. ^. ?!. (?r+ x) 3 . Sim. Fig. 1. StGothard. 



/w *v 



3.^5.^. (fr+QD)'. Pr+oo. Siberia. 

 4. S ^- - 



The individuals of Fig. 79. St Gothard. 



6 * ^ - 1^_? -?! 

 ~2~ V "2* ~2 "2" 



(Pr + oo) 5 . (Pr+QD) 5 . Pr+QD. Fig. 62. 



Cleavage, highly perfect and easily obtain- 

 ed. Pr -j- QD perfect, but often interrupted by 

 conchoidal fracture, and less easily obtained. 

 Traces of (Pr + cc) 5 , generally one of the faces 

 a little more distinct, Fracture conchoidal... 



