Word: selenium
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Dates: during 1930-1939
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...half-dozen countries, notably England, Italy, the U. S. Italy's Professor Enrico Fermi and his aids have coaxed radiations of beta particles (fast electrons) from phosphorus, iron, silicon, aluminum, chlorine, vanadium, copper, arsenic, silver, tellurium, iodine, chromium, barium, fluorine, sodium, magnesium, titanium, zirconium, zinc, strontium, antimony, selenium, bromine...
...radio waves toward a parabolic reflector which focused on a small antenna. Scientists doubted last week that Mr. Gregory, who is a nurseryman as well as an inventor, could have done any better, and their doubts were magnified by a report that his hidden receiver worked by means of selenium cells...
...like to hear ranchmen blame "alkali disease," because during the last century alkali disease afflicted the Indians inhabiting the same areas. Last week, when it could also report progress on a cure, the Department explained what was ailing the cattle. It was not alkali disease, said the Department, but selenium poisoning. Selenium is the light-sensitive substance used in photoelectric cells, and is closely related chemically to sulphur. From selenium compounds discovered in the soil of the affected districts, wheat and other plants absorb the poisonous element. The Department's investigators found that if sulphur-harmless alike to plant...
...built a large, efficient generator at Hartford, operated by mercury vapor instead of steam (TIME. July 8, 1929), is building another at Schenectady. The mercury boilers are dangerous because they might leak mercury, poison the workmen. A delicate mercury detector was in order. It is a yellow plaque of selenium sulfide. A few drops of mercury in a furnace through which pass more than 200,000 Ib. of flue gas an hour, said A. J. Nerad, blackens the yellow plaque. The degree of blackening indicates the amount of mercury present. A photo-electric cell measures the blackening, warns workmen...
...visagraph works as follows: slim beams of light are reflected from a printed page into a selenium cell which translates the blank and printed patches into various electrical frequencies. The currents operate electromagnets which drive pins against a sheet of aluminum. The aluminum progressively becomes embossed with letters as the master light roves across the original page. The blind thereby can feel the upcoming words almost as fast...