In Paris, Camilla Dussard gave a demonstration of "cold light." In the presence of famed members of the Academic des Sciences, he touched the wires of his 2,000-candle-power electric lamp and was no more harmed than if he had exposed his hand to the fiery spray of a holiday "sparkler." No shock nor burn resulted.
"Only one watt in a 100-watt lamp actually illuminates," the inventor explained, "the others merely give off heat." Yet it is possible, he believes, to build a 10,000-candle-power lamp that will give off no...
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