58 PHYSIOGRAPHY. CLASS II. 



(/) = 110 37' ; (- ^ (x, Soret) 106 16' ; 



(Pr + x) 3 (h, Sor.) = 71 41'; (*, Sor.) 



= 83 18'; (P 4- x) 5 (7j, Sor.) =r 51 20' ; 

 f r (w, A'or.) = ISO 8' ; Pr + x (P) ; 



= 8S o a , . p r + 



Char, of Comb. Hemi-prismatic. Inclination of 



P oc to Pr + oo = 99 11'. 



p 

 Combinations. 1. _ P _j_ x. Pr + cx>. Fig. 57. 



Shotoverhill near Oxford. 



P P 



2. - . P + x. f r + x. Kommothau, 



Bohemia. 



3. L. l2?-ZL?.P+ x.Pr+ x. Shotoverhill. 



p 4 -p r 2 _ Q 



4. _. l":i. P + QD. (Pr + QD). 

 2 <* 



Pr + x. Fig. 58. Bex, Switzerland. 



Cleavage. Pr -}- x, highly perfect and easily obtain- 

 ed ; > and Pr -f x imperfect, the latter of 



these being of a conchoidal appearance, while 

 the former is difficultly obtained, on account of 



the flexibility of the mineral in that direction, 



p 



and often of a fibrous aspect. Traces of . 



a 



Fracture scarcely perceptible. 

 Surface. P + CD and Pr -f- x streaked parallel to 



