This manometric apparatus, consisting of a circular brass platform with three jets and a mahogany screen, was probably made by Koenig, and probably purchased for the Smithsonian by Joseph Henry, the physicist who served as founding Secretary of the Institution.
Ref: Rudolph Koenig, Catalogue des Appareils d’Acoustique (Paris, 1889), p. 84.
David Pantalony, Altered Sensations: Rudolph Koenig’s Acoustical Workshop in Nineteenth-Century Paris (2009), p. 58
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