Word: detectors
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Dates: during 1940-1949
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...bombarding molecules to make them give off distinctive rays, he traced chemical changes in the body with great exactness. He followed an individual molecule's course through the body with a ray detector-something like watching the movements of a dyed member of a school of fish. One of his findings: a given water molecule, after drinking, usually stays in the human body about 13 days. For example, in urination, an individual expels not the liquid last drunk but the older accumulations in his body's reservoir...
...back of his hand, when peeled off, will pull out particles of gunpowder imbedded in the skin. A new X-ray test reveals tiny particles of lead in clothing, showing that a bullet has been fired through it. Dr. Snyder reports that detectives have found the lie detector extremely useful. Though it is exceedingly dubious in the case of pathological liars, drunks, dope addicts or morons, it has solved many an otherwise unsolvable crime. Of 1,551 suspects tested with Leonarde Keeler's famed lie detector, 563 were caught lying and of these 308 promptly confessed...
Awful Truth. In Manhattan, New York Post Columnist Leonard Lyons reported that in California a psychiatric patient was asked if he were Napoleon. He craftily said "No." A lie detector showed he was lying...
...getting them to pick up the quivering coals, then sent for help. School officials who came on the run found the disturb ance subsiding, but swear that lumps of coal were still trembling. Next day State Fire Marshal Charles Schwartz organized a full-dress investigation. Submitted to lie-detector tests, Teacher Rebel and her pupils got a clean bill of truth-telling health. Chemists in the state colleges closely analyzed the coal. They could find nothing out of the way. The coal, the bucket and the dictionary were shipped to the FBI in Washington. The citizens of Richardton decided that...
...which blankets the earth's outer atmosphere. Physicists have measured the height of this layer, varying from 60 to 1,200 mi., by bouncing radio waves off it and catching their echo on a receiver. The first hint of radio's possible usefulness as a ground-level detector came when experimenters noticed that a ship moving between a transmitter and receiver interfered with radio waves. The basic radar instrument had three main elements: 1) a short-wave sender-receiver which could bounce back a beam, through clouds, smoke or rain, from a small object (e.g., a plane...