Copper has generally been a contentious metal, existing side by side with violent political upheavals, bitter labor strife and speculative price binges. It is the modern metal of communications, a major ingredient of the wires that serve the vast electrical-equipment industry, the huge utilities, and the radio and TV networks. Yet it has seldom caused more excitement than it did last week. A U.S. company, Texas Gulf Sulphur, announced the discovery of one of the biggest and richest copper lodes in history near Timmins, Ont., 350 miles north of Toronto. Test borings...
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