PHYSIOGRAPHY. 



Sulpho-Selenite Sulphur. 



215 



SULPHATE OF LEAD. (See Jlnglesite.) 

 SULPHATE OF LIME. (See Gypsum.) 

 SULPHATE OF MAGNESIA. (See Epsom-Salt.) 

 SULPHATE OF POTASH. (See rfphthitalite.) 

 SULPHATE OF SODA. (See Glauber- Salt.) 

 SULPHATE OF STRONTIAM. (See Celestine.) 

 SULPHATE OF ZINC. (See White- Vitriol.) 

 SULPHATO-CARBONATE OF LEAD. (See Dyoxylite.) 

 SULPHATO-TRI-CARBONATE OF LEAD. (See Leadhil- 

 lite.) 



SULPHO-SELENITE. Selenous Brittle-Sul- 

 phur. 



Massive : in thin seams. 

 Color brown. 



1. It is a sulphuret of selenium. 



2. It occjirs with Sal-Ammoniac in the crater of Volcano, one of the 

 Lipari islands; and probably with Iron Pyrites at Fahlun, Sweden. 



SULPHUR. Prismatic Brittle-Sulphur. 



Primary form. Octahedron with rhombic base. P on 

 P"=106 20'. 



Secondary forms. 



Fig. 425. Fig. 426. Fig. 427. 



