Word: selenium
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...Marconi that "it will soon be possible to transmit a picture or a whole page of print across the Atlantic by radio," was amplified. Marconi's prophecy, it appeared, was based on the development, in various European laboratories, of a new photo-electric cell, much more sensitive than the selenium cells hitherto used with indifferent results. The inventor of the cell was one Dr. Carolus, who had based his work on the so-called Kerr method of influencing polarized light so that high voltage produces a strong light ray, low voltage a weak ray. The Carolus cell, which...
...instrument, called the "luminaphone," releases light from a series of searchlights to strike through a pattern of holes on revolving disks. Each hole is the equivalent of a note of music. The light, interrupted so as to form the pattern of a tune, passes through the holes to strike selenium plates, setting up vibrations which are "amplified" as on a radio. When Inventor Grindell-Matthews placed his hand over one of the lights, a note was deadened; when all the lights were covered, all sounds ceased. The instrument has a tone like that of a little pipe-organ...
...Selenium insulation for electric wires was the contribution of Adviser Little to better fire protection...
...Using a selenium cell, which is photo-electric (i.e., when sensitized by light rays, it gives off an electric current), French engineers of the military wireless service, General Gustave Ferie, M. Jouaust and Major Mesny, amplified waves from Capella, the blue star of the first magnitude in the constellation Auriga, into audible sound waves. The transformation was effected by a bulb of four electrodes, with much higher potential than the audion bulbs commonly used in wireless. The star is 71 light years (over 400 trillion miles) from the earth. The sounds were audible over a telephone to a considerable distance...