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The Supreme Court of the United States decides Lochner v. New York, which holds that the "right to free contract" is implicit in the due process clause of the Fourteenth Amendment to the United States Constitution.
The Chicago "L" elevated rail system begins operation.
The North Tower of the World Trade Center in Manhattan, New York, New York is topped out at 417 metres (1,368 ft), making it the tallest building in the world.
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