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[ACOUSTICS] CHLADNI, E. F. F.. Entdeckungen über die Theorie des Klanges. Leipzig, Weidmanns Erben und Reich, 1787.

First edition of this experimental classic – a novel attempt to describe and visualize the production of sound from solid bodies – now considered “the foundation of the modern science of acoustics” (PMM). Chladni devised a method of representing vibrating bodies by means of sand figures (still known as “Chladni figures”) by spreading sand over glass and copper plates and drawing a violin bow over their edges to make the plates vibrate. “The strange and beautiful Chladni figures ... attracted much scientific attention in the early 19th century, inspiring fruitful investigation of the mathematics of elastic vibration” (Norman).

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