CHAPTER XXXI.

THE NEW METALS.

Zinc—The Ores, but not the Metal, known to the Ancients— Rapid increase of its Production—Chief Zinc-producing Countries—Platinum—Antimony—Bismuth—Cobalt and Nickel— Wolfram—Arsenic—Chrome—Manganese—Cadmium—Titanium— Molybdenum—Aluminium—Aluminium Bronze—Magnesium—Sodium— Palladium—Rhodium—Thallium 380