140 PHYSIOGRAPHY. CLASS H. 



4. PYRAMIDAL LEAD-BARYTE. 



Pyramidal Lead-Spar. JAM. Syst. Vol. II. p. 362. Man. 

 p. 88. Molybdate of Lead. PHILL. p. 348. Gelb- 

 bleierz. WERN. Hoffm. H. B. IV. 1. S. 36. Bleigelb. 

 HAUSM. III. S. 1 101. Molybdansaures Blei. LEONH. 

 S. 249. Plomb molybdate. HAUY. Traite, T. III. 

 p. 498. Tabl. comp. p. 83. Traite', 2de Ed. T. III. 

 p>397. 



Fundamental form. Isosceles four-sided pyramid. 

 P = 99 40', 131 35'. Yol. I. Fig. 8. B, G. 



Simple forms. P oo (a) ; P 3 (c) = 128 9', 

 76 22' ; P 1 (e) = 106 44', 115 7' ; P(P), 

 Bleiberg, Carinthia; ^ P 3 (b) = 130 

 11', 73 T ; ^ P 2 (d) = 118 26', 92 43' ; 

 P+ oo; [P+ oo]; [(P + 00)^]. 



Char, of Comb. Pyramidal. 



Combinations. 1. P - cc. ^ P 3. Fig. 92. 

 Annaberg, Austria. 



2. P <x. P 3. Bleiberg, Carinthia. 



3. P OD. P. Windisch Kappel, Carinthia. 



4. p _ op. L^I p _ 3. p 3. Fig. 94. Blei- 

 berg. 



5. P oo. ^-iP -3. P. Fig. 93. Annaberg. 



6. J^P 3. ^p-P -3. P 1. P. Fig. 

 95. 3 Bleiberg. 



Cleavage. P very smooth, but often interrupted 

 by conchoidal fracture. P oo and 3 P 3 

 less distinct and not observable in every indivi- 

 dual. Fracture conchoidal, generally imperfect. 

 Surface, P oo, and particularly P, also several 

 forms not enumerated above, smooth, P oo 



