File:Fig 13 The Phonautograph of Clarence John Blake (1880).jpg
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Captions
Captions
A phonautograph
Summary[edit]
| Description |
English: Illustration of a phonautograph device showing an acoustic trumpet attached to a stylus on a stable surface |
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| Source | Le téléphone, le microphone et le phonographe (1880, 3rd edition), by Théodose du Moncel (1821-1884) | |||||||||||||||||||||||||||||||||||||||||
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Licensing[edit]
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. 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. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:14, 17 April 2023 | | 3,927 × 4,862 (4.9 MB) | Illandancient (talk | contribs) | Uploaded a work by C. L from Le téléphone, le microphone et le phonographe (1880, 3rd edition), by Théodose du Moncel (1821-1884) with UploadWizard |
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