File:Voyage in Space page044.png
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Summary[edit]
| Description |
English: An oscillating system with a variable period (unlike a pendulum). |
| Date | |
| Source | A Voyage in Space[1]. |
| Author | Herbert Hall Turner |
Licensing[edit]
|
The author died in 1930, so 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 80 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 | 14:37, 19 December 2015 | | 1,340 × 340 (23 KB) | Keith Edkins (talk | contribs) | {{Information |Description={{en|1=An oscillating system with a variable period (unlike a pendulum).}} |Source=A Voyage in Space[https://archive.org/details/voyageinspacecou00turnrich]. |Author=Herbert Hall Turner |Date=1913 |Permission= |other_version... |
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