Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 278
form shownin fig. 135. TALL FLAMES. When a brilliant sensitive flame illuminates an other-wise dark room, in which a suitable bell is caused to strike,a series of periodic quenchings of the light by the soundoccurs. Every stroke of the bell is accompanied by amomentary darkening of the room. The… … made burners issue flat flames, about ten inches high, andthree inches across at their widest part. When thewhistle sounds, the plane of each flame turns ninety de-grees round, and continues in its new position as long asthe sound continues. A flame of admirable steadiness and brilliancy nowbums…
Sound
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![An illustration from Sketch of Prof. John Le Conte ; [and] Sensitive flames and sound-shadows (1889)](https://img.insideoutlibrary.com/img/200/ia-sketchofprofjohn00stevrich-25-3.webp)
