In his Chicago courtroom last week Circuit Judge Harry M. Fisher stared at a voltmeter which had been placed before him on the bench. The voltmeter was connected to a switch, and the switch was connected with the courtroom lights. When the switch was closed Judge Fisher saw the voltmeter needle leap from 0 to 110 on the dial. What he had to decide was whether the thing that made the needle leap was tangible or intangible. There to help him, but arguing on opposite sides of the dispute, were two distinguished Nobel Prizemen....
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