134 PHYSIOGRAPHY. CLASS II. 



PniLL.p. 344. 345. Braunbleierz. Griinbleierz. WERN. 

 Hoffm. H. B. IV. 1. S. 15. 27. Pyromorphit. Trau- 

 blenblei. HAUSM. III. S. 1090. 1093. Phosphorsaures 

 Blei. LEONH. S. 236. Ploinb phosphate. HAUY. Trait^, 

 T. III. p. 490. Tabl. comp. p. 82. Traite, 2de Ed. T. III. 

 p. 385. 



Fundamental form. Rhombohedron. R 88 29'. 

 Vol. I. Fig. 7. R. G. 



Simple forms. R 00(0); R; R; R-|- oo 

 (g) ; P (P. s) = 142 1%, 80 44'; P + 1 ; 

 P + 2; P -f oo (). 



Char, of Comb. Di-rhombohedral. 2 (R) = 131 5', 

 111 48'. 



Combinations. 1. R oo. P -f- oo. Przibram, 

 Bohemia. 



2. R oo. P. P + oo. Sim. Fig. 118. Zschop- 



au. Saxony. 



3. R oo. P. R -f oo. P+oo. Freiburg, 



Baden. 



Cleavage. P imperfect and interrupted. Traces 

 of P -f- oo. Fracture imperfect conchoidal, un- 

 even. Surface, P+oo almost always horizon- 

 tally streaked, and often uneven. Owing to 

 these striae, the prisms are often barrel-shaped, 

 or contracted at the ends of the prisms. R oo 

 rough, and often excavated. 



Lustre resinous. Colour, generally green or brown. 

 There is an uninterrupted series from various 

 shades of white through siskin-green, asparagus- 

 green, grass-green, pistachio-green, olive-green, 

 oil-green ; wax-yellow, honey-yellow, orange- 



