Tyndall, John, 1820-1893 · New York, Collier · leaf 337
2d, 4th, 6th, etc., of the lower series of cells areconnected by bent tubes (n n n) with the lower reservoir(i), each having its direct passage into the air through thecell immediately above it. The gas-distributors (g and i)are filled from. both ends at the same time, the upperwith carbonic-acid… … SOUND 335 forth by an electric bell (dotted in the figure). A fewfeet from the other end of the tunnel, and in a directline with it, is a sensitive flame (&), provided with afunnel as sound-collector, and guarded from chancecurrents by a shade. The bell was set ringing. The flame, with…
Sound
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