Collier's New Encyclopedia

A complete general encyclopedia of 1921 — the world as it was understood just after the Great War, from Aachen to Zwingli, across twelve volumes and six thousand pages.

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Chromite

a metal used extensively as an alloy to harden steel. It was exthe manufacture of munitions. The prothe manufacture of munitions. The pro- States was 3,900 long tons, valued at $87,000. There were imported 61,404 ent consumption was 65,304 long tons.

The chief sources of supply are the United States, Canada, British South Africa, New Caledonia, and India.

CHROMIUM (or CHROME) STEEL, steel in which the carbon is replaced by tain a greater degree of heat than ordinary steel, and consequently will not so easily become oxidized or "burnt" in working and is rolled more easily. the metal chromium. This steel can sus-

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