Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 143
esonator for each bar. When a bar is struck, its downward movement producesan air wave which moves downward, strikes the bottom ofthe resonator, and is reflected upward in time to re-enforcethe outwardly moving air wave produced bv the upwardbending of the bar. The metallophone yields sweet tones… … Mouth Organ, or Harmonica. tion of free reeds rjr tongues rigidlv held at one end andfree to vibrate at the other end. The tongues of themusic box are made by slitting the edge of a steel plate,forming a comb, which is arranged with its teeth projectinginto the paths of the pins of the cyhnder,…
Physics · Lantern projection · Electric apparatus and appliances
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