Publisher's Synopsis
Excerpt from Upon the Production of Sound by Radiant Energy: Paper Read Before the National Academy of Sciences, April, 21, 1881
The substance to be tested was to be placed in the interior of a transparent vessel, made of some material which (like glass) is transparent to light, but practically opaque to sound.
Under such circumstances the light could get in, but the sound produced by the vibration of the substance could not get out. The audible effects could be studied by placing the ear in communication with the interior of the vessel by means of a hearing tube.
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