A WONDERFUL LIGHT.
Tt is ten feet high, its mirror has a diameter of five leet, and it weighs three tons. Its beam is as brilliant as the sun at 8 o’clock in the morning or 4 in the afternoon, New York latit, ude and you can use a newspaper by its light 30 miles away, The heat of its focussed beam is so intense that it- will set naper afire at a distance of 2-50 feet.* It has a candle power of more than one and a quarter' billion. These are a few astonishing facts in the, ‘Popular Science Monthly’ about, the Sperry searchlight, the invention of Elme A .Sperry, of Brooklyn,, who is already known as the inventor of the airplane stabiliser and the shin gyroscope bearing his name and first electric arc light. One of the most powerful beacons along the American coast is the Sandy Hook lighthouse. But the Sperry searchlight is 22 times more brilliant than that light. Were the Sperry lamp substituted for the lighthouse beacon, a shin passing out to the sea could he bathed in light- until it disappeared below the horizon. By swinging the light back and forth across the ? ky it has been made visible 150 miles away. For navy us the Sperry lamp illuminates a target ten times more brilliant- than any other projector devised. HM
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Bibliographic details
Hokitika Guardian, 21 March 1918, Page 3
Word Count
227A WONDERFUL LIGHT. Hokitika Guardian, 21 March 1918, Page 3
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