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File:Koenig apparatus after Helmholtz (ten resonators), 1889.jpg

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Summary

Description
English: Rudolph Koenig's sound synthesiser after Helmholtz, as pictured in his 1889 price list.
Date
Source Rudolph Koenig, Catalogue des Appareils D'Acoustique (1889), p. 26
Author Rudolph Koenig

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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current19:32, 27 January 2024Thumbnail for version as of 19:32, 27 January 20241,250 × 1,230 (791 KB)SchminnteUploaded a work by Rudolph Koenig from Rudolph Koenig, Catalogue des Appareils D'Acoustique (1889), p. 26 with UploadWizard

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