Word: instruments
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Dates: during 1920-1929
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...This instrument is a device for taking very delicate measurements of the speed of light rays. Two rays are used for comparison. It works roughly on the principle that, if two sets of waves are produced and the crest of one is timed to come in the trough of another, the appearance of waves is destroyed. In the case of light, this means a dark place or shadow. When the light rays are received upon a given surface, visible dark lines are formed by the interference of the waves. Using this device in Southern California, last year, experiments were made...
...interference, hence no dark lines and light fringes on the receiving surface. If the beam going in one direction traveled faster than the beam going in the opposite direction, their waves would arrive at different times; there would be interference, hence black lines and light fringes visible in the instrument. With this second result, it would be apparent that something impeded the light going in one direction-the movement of the earth (as the Einstein theory foretells would be the case) or the drift of the ether (according to the ether drift theory...
...Mines. Hess, Leginska and Mérë sat jowl to jowl at one piano, played Boieldieu's overture to La Dame Blanche. Laughter and applause. Mr. Brailowsky opened the preamble of Schummann's Carnaval, passed it on to Mr. Gabrilowitch, and so the music leaped from instrument to instrument "till all marched against the Philistines...
...Wagner, von Billow, Auer, Rubinstein; he led an orchestra in which Walter made his first public appearance-as a cymbal player. The youth was so nervous that he could not lift the cymbals. Later he played in his father's orchestra with the second violins to learn how instrument players follow the conductor's beat. Recently he owned the largest private music library in the world, presented it to the New York Symphony Society. Called "Dean of American Conductors," he, now 63, has directed the New York Symphony for 39 years...
Deaf. A device to be held in a speaker's hand and attached to the hand of a totally deaf person, which transmits the vital vibrations in the speaker's body to the deaf person, was described. A limited success with the instrument has been achieved.-Dr. Robert H. Gault, Northwestern University...