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Summary
| Description |
English: A cylinder friction electric machine and a disk electric friction machine. |
| Date | (first published) |
| Source | Lectures on Electricity and Galvanism, in their physiological and therapeutical relations, delivered at the Royal College of Physicians, in March 1847, p.104, Philadelphia: William H. Hazard 1854 |
| Author | w:Golding Bird |
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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.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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| 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 | 01:34, 2 April 2011 | | 711 × 347 (31 KB) | Spinningspark | {{Information |Description=A cylinder friction electric machine and a disk electric friction machine. |Source=''Lectures on Electricity and Galvanism, in their physiological and therapeutical relations'', delivered at the Royal College of Physicians, in M |
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