METALS Cuban Manganese
As the No. 1 world manufacturer of steel, the U. S. is the leading user of a black, coal-like mineral: manganese (Mn to chemists). An essential for the manufacture of steel and certain alloys therefore essential for national defense manganese is more than 95% an imported material. It comes chiefly from Britain's African Gold Coast, the U. S. S. R. (No. 1 world producer), Cuba, India.
When World War I threatened its manganese supply, the U. S. increased purchases of ore from Cuba and Brazil, began working its own submarginal deposits....
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