Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 84
ns to passobliquely through thetop of the cylinder C, andto impinge on the oppo-sitely inclined orifices ofthe rotating disc d e.The air is thus causedto issue from c, notvertically, but in sidecuiTents, which impingeagainst the disc anddrive it round. In this^^y? by its passagethrough the syren,… … 64 LECTURE II.
Sound
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