Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 33
. Into one end of a tin tube, fifteen feetlong, I whisper in a manner quite inaudible to the peoplenearest to me, but a listener at the other end hears medistinctly. If a watch be placed at one end of the tube,a person at the other end hears the ticks, though nobodyelse does. At the distant end of… … When two books, b b, fig. 5, are clapped together, thecandle is blown out.* You may here observe, in a roughway, the speed with which the sound-wave is propagated.The instant the clap is heard the flame is extinguished.I do not say that the time required by the sound to travelthrough this tube is…
Sound
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