Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 105
is heard easily, but if thereceiver is now exhausted by a good air-pump it be-comes feebler, continually becoming weaker as theexhaustion proceeds. Fig. 121.—Electric bell If now the air is admitted to the receiver the in a jar connected , . , i t to an air-pump. On sound at once gets… … 98 PRODUCTION AND TRANSMISSION OF SOUND which tlie electric bell is suspended will also transmit somesound. If the bell were in a perfect vacuum we would seethe hammer striking the bell but would hear no sound at all. 109. Velocity of Sound in Air. If we watch a carpenterworking at a distance we…
Physics
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