142 PHYSIOGRAPHY. CLASS 11. 



veins in newer limestone, with ores of lead and zinc, also 

 with rhombohedral Lime-haloide ; it is seldom met with 

 in primitive rocks, associated with the same species, or 

 also with hemi-prismatic Habroneme-malachite. 



3. It occurs in many of the lead mines of Carinthia, as 

 at Deutsch- and Windisch-Bleiberg, Windisch-Kappel, &c., 

 also, and likewise in limestone, at Annaberg in Austria. It 

 is found in the copper mines of Rezbanya in Upper Hungary, 

 and in the lead mines of Pennsylvania and Massachusetts, 

 and at JZimapan in Mexico, in compact limestone. Mi- 

 nute crystals of an almost hyacinth-red colour have lately 

 been discovered at Moldawa in the Bannat, and, on ac- 

 count of their bright red colour, considered as herai-pris- 

 matic Lead-baryte. 



5. PRISMATIC LEAD-BARYTE. 



Tri-prismatic Lead-spar, or Sulphate of Lead. JAM. Syst. 

 Vol. II. p. 359. Prismatic Lead-spar, or Sulphate of 

 Lead. Man. p. 89. Sulphate of Lead. PHILL. p. 346. 

 Vitriol-bleierz. WEEK. Hoffm. H. B. IV. 1. S. 41. 

 Bleivitriol. HATJ SM. III. S. 1 1 15. Blei-Vitriol. LEONH. 

 S. 232. Plomb sulfate'. HAUY. Traite', T. III. p. 503. 

 Tabl. comp, p. 83. Traite', 2de Ed. T. III. p. 402. 



Fundamental form. Scalene four-sided pyramid. 

 P = 128 58', 89 59', 111 48'. Vol. I. Fig. 9. 

 R. G. 



a : b : c = 1 : V 1-6935 : ^0-6286. 



Simple forms. P oo (x) ; P 1 ; P (s) ; 

 (Pr 2) 3 ; (?r I) 3 ; (?r + <x)* (P P") 

 = 78 45'; (f H- oo) 4 = W 37; Pr (t) 

 = 104 55' ; Pr + oo (ri) ; Pr (P P") = 76 11'; 

 Pr + oo (o). 



Char, of Comb. Prismatic. 



Combinations. 1. Pr. (Pr + oo) 5 . Parys mine, 

 Anglesea. 



