Tyndall, John, 1820-1893 · New York : Appleton · leaf 44
ll issuspended by strings, for if itwere allowed to rest upon theplate of the air - pump, thevibrations would be communi-cated to the plate, and thencetransmitted to the air outside.Permitting the air to enter the jar with as little noise aspossible, you immediately hear a feeble sound, whichgrows… … 38 SOUND. Sir John Leslie found hydrogen singularly incompe-tent to act as the vehicle of the sound of a bell rung in thegas. More than this, he emptied a receiver like that be-fore you of half its air, and plainly heard the ringing ofthe bell. On permitting hydrogen to enter the…
Sound
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