Tyndall, John, 1820-1893 · New York : Appleton · leaf 224
the membrane outward, and, when rarefied,the external air would press the membrane inward. Themembrane would therefore vibrate in unison with thecolumn of air. The organ-pipe, Fig. 102, is so arrangedthat a small jet of gas, b, can be lighted opposite the centrtof the pipe, and there acted upon by… … through the tube, t, the gas enters the hollow chamber,e d, from which issue three little bent tubes, shown in thefigure, each communicating with a capsule closed under-neath by the membrane. This is in direct contact withthe air of the organ-pipe. From the three capsules issuethe three little…
Sound
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