File:PSM V84 D107 North-south cross section of atwood celestial sphere.jpg
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Summary
| Description | Atwood Celestial Sphere. North-south cross section of the sphere. 1-2. South polar ring at entrance. 3. Upper wheel supporting sphere. 4. One of two lower wheels which support the sphere and are propelled by motor. 5. Electric Motor. 6. North Pole of the heavens. 7-8. Horizone Table. 9. Observers' Platform. 10. Switch Board. 11. Electric Wire.12-13. Ecliptic or apparent path of the sun. | |||
| Source | The Popular science monthly, Volume 84, p103. New York, Popular Science Pub. Co., January 1914. Online: archive.org. | |||
| Author | Unknown author | |||
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Licensing
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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.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:51, 11 March 2018 | | 1,720 × 1,373 (276 KB) | Ineuw | Cleaned image |
| 14:18, 14 March 2011 |  | 1,720 × 1,373 (312 KB) | Martin H. |
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