Argentite (3d) is an important Silver-ore, containing 87 per cent. of Silver and 13 of Sulphur.
Blende (4b) is a valuable Zinc-ore, and contains 67 per cent. of Zinc and 33 per cent. of Sulphur.
Galena (4e) is by far the most important ore of Lead (Lead 87, Sulphur 13, per cent.).
Copper-glance (3e) is a common ore of Copper (Copper 80, Sulphur 20, per cent.).
Cinnabar (3h) is the ore from which Mercury or Quicksilver is obtained (Mercury 86, Sulphur 14, per cent.).
Pyrites (5d), one of the most common of Minerals, is a compound of Iron and Sulphur (Iron 47, Sulphur 53, per cent.).
Erubescite (5e), Copper pyrites (5f), and Tetrahedrite, or Grey Copper-ore (7a), are valuable sources of Copper.
Chlorides, etc.
III. Common Salt, the chloride of the metal Sodium, is exhibited in case 8f, and Fluor-spar, a fluoride of Calcium belonging to the same division, begins at case 7e.
Oxides.