Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 275
this flame, varying the pitch of your voice, but no shiver ofthe flame would be visible. You might employ pitch-pipes, tuning-forks, bells, and trumpets, with a like ab- BAT S-WIXG AXD FISH-TAIL FLAMES. 253 sence of all effect. A barely perceptible motion of theinterior of the flame may be noticed…
Sound
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