Tyndall, John, 1820-1893 · New York : Appleton · leaf 323
s sound-collector, and guarded from chance currentsby a shade. The bell was set ringing. The flame, with quick re-sponse to each blow of the hammer, emitted a sort ofmusica* roar, shortening and lengthening as the succes-sive sound-pulses reached it. The gases were then ad-mitted. Twenty-five flat… … n REFLECTION FROM CARBONIC ACID AND COAL GAS. 315 each of which a portion of the sound was thrown back.In a few moments these successive reflections became soeffective that no sound having sufficient power to affectthe flame could pierce the clear, optically-transparent,but acoustically-opaque,…
Sound
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