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Show OLDEST. MOST USEFUL Copper, "man's oldest and most useful metal", is more precious prec-ious than gold in warfare. Wars have been won by nations with little gold witness our own Revolution but no nation can tight a modern war successfully without a vast amount of copper and its alloys. Not only is coppe- vital to the Army, it is even more important import-ant to the Navy. Without copper ndenser tubes a modern battle fleet would be immobilized. immobiliz-ed. Communications, fire control, con-trol, every operating element of a warship depends on copper. Even the big guns depend on copper for accurate firing, each projectile having one or more rotating bands made of coDDer or a copper alloy. from an advertisement in a national magazine. |