108 PHYSIOGRAPHY. CLASS 11. 



transition mountains, with other minerals containing man- 

 ganese. 



4. It is frequently found in several of the Saxon mines, 

 particularly in the neighbourhood of Freiberg, also at Nagy- 

 ag and Kapnik in Transylvania, near Elbingerode in the 

 Hartz, and in other countries. 



GENUS II. ZINC-BARYTE. 

 1. PRISMATIC ZINC-BARYTE. 



Prismatic Calamine or Electric Calamine. JAM. Vol. II. 

 p. 437. Man. p. 65. Siliceous Oxide of Zinc. Electric 

 Calamine. PHILL. p. 254. Galmei (in part). WERN. 

 Hoffm. H. B. IV. 1. S. 90. Zinkglas. HAUSM. I. S. 343. 

 Galmei. LEONH. S. 316. Zinc oxide'. HAUV. Traite', 

 T. IV. p. 159. Tabl. comp. p. 102. Zinc oxide' silici- 

 fere. Traite', 2de Ed. T. IV. p. 175. 



Fundamental form. Scalene four-sided pyramid 

 P = 132 y, 101 9', 97 47. Vol. I, Fig! 9. AP. 



a : b : c = 1 : V 2 * 628 : V 1<0 7 2 - 



Simple forms. P oo (K) ; P (P) ; (P) 5 ; 

 (p 1)4 . (p r + 00)5 (j) - 7go T . p r __ i 



(0 = 128 27; | Pr + 1 (m) = 69 U' ; 

 Pr + oo 0) ; Pr (c) = 116 40' ; f Pr + 2 

 (p) = 56 46'. 



Char, of Comb. Prismatic. Different faces conti- 

 guous to the opposite ends of crystals. 



Combinations. 1. Pr. (Pr -f oo) 3 . Pr -f OD. 

 Sim. Fig. 8. Leadhills, Scotland. 



2. p r 1. (r + op) 5 . Pr + oo. Sim. Fig. 9. 



Rossegg, Carinthia. 



3. p r 1. p r . I Pr + 2. (Pr + oo) 3 . 



Pr -|- oo. Rezbanya, Hungary. 



4. P OD. Pr 1. Pr. |Pr+l. | 



