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2. Potash. 
Muriate of potash. Hydrobromate of potash. Sulphate of potash. 
Carbonate of potash. 
3. Soda. 
Muriate of soda. Sulphate of soda. 
Hydrobromate of soda. Carbonate of soda. 
CLASS V. 
Alkaline Earthy Minerals. 
Composed of one or more of the alkaline earths^ baryta^ strontia^ lime, or 
magnesia, combined with water or an acid, and frequently containing 
some metallic oxide. 
1. Baryta. 
Sulphate of baryta. 
2. Strontia. 
Sulphate of strontia. Carbonate of strontia. Barystrontianite. 
3. Lime. 
Muriate of lime. Anhydrite. Arragonite. 
Fluor Spar. Gypsum. Calstronbarite. 
Nitrate of lime. Phosphate of lime. 
Calcareous spar, and most of the varieties of carbonate of lime. 
4. Magnesia. 
Hydrate of magnesia. Sulphate of magnesia. Dolomite. 
Muriate of magnesia. Carbonate of magnesia. Hydraulic limestone. 
Hydrobromate of magnesia. Rhomb Spar. 
CLASS VI. 
Earthy Minerals. 
Composed chiefly of one or more of the earths proper; they frequently con- 
tain some alkali, alkaline earth, acid or metallic oxide, 
1. Silica. 
a. Minerals in which the silica is nearly pure. 
Quartz, (most of its varieties.) Basanite. 
Chalcedony. Jasper. 
b. Minerals in which the silica generally performs the part of an acid. 
Tabular Spar. Talc. Byssolite. 
Nemalite. Diopside. Hypersthene. 
Serpentine. Pyroxene. Hydrous Anthophyllite. 
Kerolite or Magnesite. Hornblende. Warwickite. 
