Sound & Science: Digital Histories

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Helmholtz resonators by Rudolph Koenig

“Helmholtz Resonators By Rudolph Koenig”. n.d. Cleveland, OH: Case Western Reserve University.
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Appunn’s “tenor” tonometer (2)

“Appunn’s “Tenor” Tonometer (2)”. 1876.
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Appunn’s “tenor” tonometer (3)

“Appunn’s “Tenor” Tonometer (3)”. 1876.
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Appunn’s “tenor” tonometer (5)

“Appunn’s “Tenor” Tonometer (5)”. 1876.
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Appunn’s “tenor” tonometer (6)

“Appunn’s “Tenor” Tonometer (6)”. 1876.
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Appunn’s “tenor” tonometer (7)

“Appunn’s “Tenor” Tonometer (7)”. 1876.
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Appunn’s “tenor” tonometer (1)

“Appunn’s “Tenor” Tonometer (1)”. 1876.
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Drawing of a clock fork from Koenig’s Catalogue, 1889

Koenig, Rudolph. 1889. Catalogue Des Appareils D'acoustique. Paris: Impr. de P. Mouillot.
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Drawing of a universal resonator from Koenig’s Catalogue, 1889

Koenig, Rudolph. 1889. Catalogue Des Appareils D'acoustique. Paris: Impr. de P. Mouillot.
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Apparatus for singing- and speaking-arc experiments from the Max Kohl catalog

Max Kohl A.G.,. 1911. “Complete Apparatus For Experiments With The Speaking Arc Lamp”. Chemnitz.

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