Word: detectable
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...aware, like other experimenters, that cerebral tumors frequently nudge the olfactory centres of the brain, blunt the sense of smell. But sharpness of smell is so inconstant and the weak human nose can detect such minute quantities of a substance, that precise measurement seemed hopeless. Then Dr. Elsberg tried having the subject hold his breath while whiffs of air saturated with coffee or lemon oil from a stoppered flask were pumped up the nostrils, directly against the ends of the olfactory nerves. He found that in normal persons a fairly constant and easily measurable quantity of scent-laden...
...ground was detonated. The earth tremors were recorded on a seismograph mounted on a truck some distance away. From the shock record the speed of the tremors was deduced, and from that the geological character of the ground. Also on view were gravity instruments so sensitive that they detect the moon's tidal pull on the earth. With such equipment, said Research Director Paul Darwin Foote, the chance of a drill striking oil has been increased from...
...thong to which was attached a small leather-covered cylinder. When suspended over gold-bearing ground, the indicator was supposed to vibrate. Explained Septuagenarian Haas: "I call it a mineral vibrator. . . . The principle on which it works is affinity with affinity. I have to have a gold affinity to detect gold. . . . My instrument is loaded with affinity. ... I tune in with my gold vibrator. It is like a radio. You dial until you get a certain station. . . . When I take it in my hands I am dialed in for gold...
...decibel is a varying unit of loudness. It represents the smallest difference in the level of sound which the ear can detect. The decibel difference between the rustle of leaves (8) and whispering (11) represents small intensities of sound. The decibel difference between a motor truck (77) and an elevated train (81) represents tremendous energy...
...want their crop invaded by other farmers whose land has been rendered idle by the other AAA controls. To give them that protection Mr. Hutson will have to regulate half again as many farmers as raise cotton, twice as many as raise wheat, and he will have to detect and, if necessary, fine and send to jail any others of the 6,000,000 U.S. farmers who might start raising potatoes and any of the 125,000,000 U.S. inhabitants who might buy bootleg potatoes...