File:Otto Hofmann testing the sound accuracy for zinc pipes.jpg
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Summary
| Description |
English: Otto Hofmann testing the sound accuracy for zinc pipes. Date is approximate. |
| Date | |
| Source | Family photos mostly or the photographer is dead. |
| Author | Family photos mostly or the photographer is dead. |
Licensing
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:44, 2 May 2021 | | 604 × 458 (60 KB) | Barbara Yerby | Uploaded a work by Family photos mostly or the photographer is dead. from Family photos mostly or the photographer is dead. with UploadWizard |
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