Word: testing
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Dates: during 1930-1930
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...noises so that scientists will know what wavelengths to produce to have a quiet city. Said he: It is entirely possible to produce silence by two sound-waves which fit into each other much like the teeth of two saw blades. The "electric ear" will also be used to test machines for friction, loose parts. Set in the dashboard of an airplane, the device will warn the pilot of engine trouble before he can detect it with his own ears...
...generation ago, the Test Tube was the symbol of Science. Present now is the era of the Vacuum Tube. While tubes with everything imaginable in them are still used in laboratory research, tubes with nothing in them are used in radio as amplifiers, in medicine as a source of X-rays, in the laboratory to photograph molecules, as guns to bombard and break down atoms. Last week new tube developments were reported...
...Millikan's X-rays. The entire U. S. medical profession today possesses only four million dollars worth of radium. Practical use of the Caltech apparatus has not yet been demonstrated. Before it is used on human beings, plants and animals will be subjected to the rays to test their effect on living tissue...
...many a prospective buyer of steel has awaited lower prices, now will see he cannot get them, will rush into the market. Thus they viewed their move as a step toward new business activity. Not for some time will the steelmen's reasoning be submitted to the actual test of orders received. Many a financial writer last week looked back at 1921-22 when the rise of iron and steel prices presaged a business recovery. Apparently forgotten, however, was the fact that in 1922 steel prices rose sharply only after production had commenced a rise as pronounced...
Colyumist Kahn writes with the authority of 2,700 hours flight, including considerable test and night flying. In demonstrating the Cabot Aerial Pickup device to postoffice officials at Mitchel Field last summer, he made 99 successful pickups in 100 trials. He has five planes in his own ("Roweka") hangar at Roosevelt Field, L. I.; a Vought Corsair, a Bellanca Pacemaker, an Ireland amphibian, a Fleet, a hybrid Standard with a Sikorsky wing...