Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 391
heir sequence is so rapid as to appealonly as roughness to the ear. The flames, you observe,dance within their tubes in time to the beats. As alreadystated, these beats cause a silent flame within a tube toquiver when the voice is thrown to a proper pitch, andwhen the position of the flame is… … BEATS. 369 organ-pipes nearly in unison with each other. Two otherpipes are now mounted on our wind-chest, fig. 168 (nextpage) each of which, however, is provided at its centre witha membrane intended to act upon a flame.^ Two small tubeslead from the spaces closed by the membranes, and unite Fig.…
Sound
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
