Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 180
r substances canconvey the sound quite as well. By holding the ear against one end of a wooden rod even a light scratch with a pin at the far end will be heard distinctly. One can detect the rumbling of a distant railway train by laying the ear upon the steel rail. The Indians on the western plains… … ear under water is louder than if the experiment had beenperformed in the air. Thus we see that solids, liquids and gases all transmitsound. Further, we can show that some one of these isnecessary. Under the receiver of an air-pump place an electric bell,supporting it as shown in Fig. 201. At…
Physics
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