Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 98
er. Through the same medium vibrations arecommunicated to the auditory nerve, the terminal filamentsof which are immersed in a liquid. Substituting mercuryfor water in this experiment, a similar result is obtained. The syren has received its name from its capacity tosing under water. A vessel now… … rotating, and asound of rapidlya ugm e n ti n gpitch issues fromthe vessel. Thepitch rises thusrapidly becausethe heavy andpowerfully pres-sed water soon drives the disc up to its maximum speed of rotationWhen the supply is lessened, the motion relaxes and thepitch falls. Thus, by alternately…
Sound
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