File:Fig 53 Experimental telephone earpiece.jpg
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Captions
Captions
Illustration of a lady with an experimental telephone earpiece (1880)
Summary
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| Description |
English: Experimental apparatus created by Clement Ader to investigate properties of telephone earpieces, effectively a wooden block with a precise arrangement of wires held to a person's ear |
| Date | |
| Source | Le téléphone, le microphone et le phonographe (1880, 3rd edition), by Théodose du Moncel (1821-1884) |
| Author | Armand Kohl (1845-1897) and Gilbert(?) |
Licensing
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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 | |
|---|---|---|---|---|---|
| current | 19:27, 18 April 2023 | | 4,800 × 6,135 (10.3 MB) | Illandancient (talk | contribs) | Uploaded a work by Armand Kohl (1845-1897) and Gilbert(?) from Le téléphone, le microphone et le phonographe (1880, 3rd edition), by Théodose du Moncel (1821-1884) with UploadWizard |
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