Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 567
always vibrated about twenty-sixtimes a second whether it was struck hard orgently, and that the shortest string vibratedmore than four thousand times a secondwhenever it was struck. The strings of a violin are all the samelength, but the player changes the length ofthe sounding portion by his… … A HARP.The photograph is used by the courtesy of Carl Fischer. Strings of piano, violin, etc., by swinging backand forth send out waves in the air. Theseair waves sound as music in our ears. They 1907] Nature and Science for Young Folks 555 travel about a mile in five seconds. Thelongest string on…
Children's literature
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