File:EB1911 Vacuum tube - Fig. 1.png
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Summary
| Description |
English: EB1911 Vacuum tube - Fig. 1 |
| Date | |
| Source | https://en.wikisource.org/wiki/Page:EB1911_-_Volume_27.djvu/862 |
| Author | Encyclopædia Britannica |
Licensing
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:14, 18 October 2022 | | 907 × 204 (22 KB) | Sp1nd01 | Uploaded a work by Encyclopædia Britannica from https://en.wikisource.org/wiki/Page:EB1911_-_Volume_27.djvu/862 with UploadWizard |
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