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I then changed the pitch of the vibration, and found that the pitch of the sound under my hand was also changed, agreeing with that of the vibration. Gray lost no time in applying this chance discovery by designing the physiological receiver, which consists of a sounding-box having a zinc face and mounted on an axle, so that it can be revolved by a handle.
His face seemed to say: "Why not?" His face seemed to say to Gerald and to herself: "If this incommodes you, what did you come for?" Gerald had left her at the bedroom door with a self-conscious nod. She had partly undressed and lain down, and instantly the hotel had transformed itself into a kind of sounding-box.
It consisted of a small lyre suspended from the ceiling which gave forth, in turn, the sounds of various musical instruments. Really the lyre was merely a sounding-box, and the vibrations of the music were conveyed from instruments, played in the next room, to the lyre through a steel rod. The young man spent much time experimenting with the transmission of sound.
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