Note.—After the name of the material, which is printed in small capitals, is given in ordinary type the trades, or a few typical ones, in which the material is used.
ORES.
Antimony.—Nickel and cobalt refining.
Brown Iron Ore.—Gas works.
Copper Pyrites—(Spanish Ore).—Copper extraction and refining, sulphuric acid works.
Cobalt and Nickel.—Nickel and Cobalt refining.
Hæmatite.—Iron smelting, nickel and cobalt refining, malleable iron casting, polishing works.
Galena.—Refining lead slags and products.
Iron Pyrites.—Sulphuric acid manufacture.