ORDER III. GENERA AND SPECIES. 415 



Prismatic Wliitc Antimony-. J. ii. 151. 



Corneous Lead. J. ii. 150. 



Cupreous Sulphate of Lead. BROOKE. ii. 149. 

 Cupreous Sulpliato- Carbonate ofLead.'BnoOK'E. ii. 1 49. 



Fluate of Cerium 9 Chem. iii. 100. 



Hemi-prismatic Hal-barytc. iii. 76. 



Peritomous Lead-laryte. ii. 151. 



Plombgomme 9 iii. 140. 



Stromnite 9 iii. 159. 



Sulphato-Carlonate of Lead. BKOOKE. ii. 148. 



Tungstate of Lead. Chem. iii. 165. 



Yttro-Ccrite9J. iii. 172. 



III. ORDER. . KERATE. 



I. PEARL-KERATE. Tessular, pyramidal. 

 H. = 1-0 ... 2-0. 

 G, = 5-5 ... 6-5. 



1. HEXAHEDRAL. Tessular. 



Cleavage, none. 

 Malleable. 

 H. = 1-0 ... 1-5. 

 G. = 5-5 ... 5-6. 



Hexahedral Corneous Silver. J. ii. 154. 



2. PYRAMIDAL. Pyramidal. P = 126 31 ; , 79* 3'. 



Cleavage, P 4-'o5, imperfect. 



Sectile. 



H. = 1-0 ... 2-0. 



G. = 6-4 ... 6-5. 



Calomel. ii. 15G. 



