Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 343
rapidly non-homogeneous, and immediately stills the agitated flame.The pipe A B may be turned upside down, an orificeseen between a and B fitting on to the stand which sup-ports the tube. The conduit t leads into a shallow rectan-gular box, which communicates by a series of transverseapertures with… … In the experiments at the South Foreland, not onlywas it proved that the acoustic clouds stopped the sound;but that the sounds which had been refused transmissionwere sent back by reflection. Wishing to render thisechoed sound evident experimentally, I stated to my assis-tant that we ought to be…
Sound
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