Word: radon
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Dates: during 1950-1959
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...fourth case. He would have taken more, but fortunately for him-and others-the Radithor outfit went out of business. Recently, responding to M.I.T.'s invitation, he presented himself for a checkup. Dr. Robley Dunglison Evans, 51, had him breathe into a glass flask, to test for radon gas in his breath, and into a mask hooked up to another flask to test for another gas, thoron, that has a half life of only 54 seconds. An ultra-sensitive scintillation counter scanned his whole body for gamma rays. X rays searched his bones for radioactive deposits. There, though...
...radiation gets into the air and might conceivably build up to health-hazard proportions, it does not come from the reactor. The heavy villains are the radium-painted luminous dials and markers used to permit operating in the dark. In a completely closed ventilating system with recycled air, the radon gas emitted by such markers becomes so concentrated that it could hinder detection of an actual reactor leak. After the markers were replaced by a nonradioactive type, an appreciable radon concentration remained. It was found to come from the dials of crewmen's luminous wristwatches, but was fortunately...
...probably the seat of basic anxiety) to the frontal lobes of the cortex (where anxiety and pain are felt intellectually). Los Angeles' Dr. Tracy J. Putnam has devised a way of driving two hollow needles precisely into the chosen nerve bundles. These are then destroyed by seeds of radon (a radioactive gas) dropped down the needles...