CHAPTER XXVIII.

IRON.

Iron the most valuable of Metals—Its wide Diffusion over

the Earth—Meteoric Iron—Iron very anciently known—

Extension of its Uses in Modern Times—British Iron

Production—Causes of its Rise—Hot Blast—Puddling—Coal

Smelting—The Cleveland District—Rapid Rise of

Middlesborough—British Iron Ores—Production of Foreign

Countries—The Magnetic Mountain in Russia—The Eisenerz

Mountain in Styria—Dannemora—Elba—The United States—The

Pilot Knob—The Cerro del Mercado 345

The Subterranean World · 第 28 / 48 章