Word: mica
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...iconoscope resembles a big electric light bulb with a long neck. The bulb part is 8 in. in diameter, the whole 16 in. long. Inside are, in order from bulb to butt, 1) an ordinary motion picture camera lens which focuses on 2) a 5x4 in. sheet of thin mica. The mica is coated with microscopic particles of a secret light-sensitive material (3,000,000 particles. Dr. Zworykin computes). In the bulb's neck is 3) a small, efficient, oscillating cathode tube which sends a slim beam of electrons weaving over the light-sensitive particles on the mica...
...mosaic on the mica is in effect a photo-electric cell flattened out and each particle is a tiny photocell in itself. When lights and shadows of any scene fall upon those particles, the light waves set up a positive electro-magnetic tension in the particles. The oscillating cathode beam of electrons discharge that positive tension. Thus each particle is alternately charged by light waves and discharged by the electron beam 24 times a second, which is a comfortable frequency of illumination for the human...
...getting into the "next big industry": air conditioning equipment. Dr. Robert G. Guthrie, chief metallurgist of the Chicago utility, announced the invention of a new chemical compound which he calls "lamisilite." "Lamisilite" is a silicate like silica gel (which certain new air conditioners use), quartz, opal, beryl, tourmaline, garnet, mica. Like silica gel, the new material is highly hygroscopic- absorbs moisture, dehumidifies air. The mother ore of "lamisilite" is a trade secret. Victor Chemical Co., who will make the material for the gas-operated conditioners, knows of large deposits in North and Central America, some in South America, Central Europe...
...three young men projected radium's beta (high speed electrons) and gamma (penetrating X-rays) rays out of that mica window. Left for duplication were radium's alpha particles, the nucleus of helium...
...ingenious young men.) Their machine consists essentially of a tesla coil under oil and a cascading cathode tube. The coil builds up an electrical potential to 3,000,000 volts. That enormous power is suddenly dumped into what is basically a series of X-ray tubes ending in a mica window...