rtones are less ciently.— Pharm. Central. satisfactory, but suffice for playing tunes that are re- cognizable. The Washington Monument. The experiment with the bell, represented in Fig. It is said, by those who are in position to know all 5, is very striking, and is easily performed. The bell about… … wave moving in the opposite direction, greatly aug- Fig..2.—SELECTIVE POWER OF A RESONANT VESSEL. Fig. 6.-TUNING FORKS AND RESONANT TUBES. menting its volume. The combination of two series of sound waves may point will be found where the sound is largely increased. of the Washington monument have…
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