File:Electrophorus device.png
Electrophorus_device.png (603 × 485 pixels, file size: 37 KB, MIME type: image/png)
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editDescriptionElectrophorus device.png |
English: Drawing of electrophorus electrostatic generator, invented by Johan Carl Wilcke in 1764, from an 1840 chemistry text. It consists of a 'cake' of dielectric resinous material like wax, at bottom, and a metal plate on an insulated handle that can be placed on it. After charging the bottom plate by rubbing with fur, the top plate could be repeatedly charged by placing it on the surface and grounding the top by touching the small ball, then removing it. Alterations: removed caption and part labels, increased brightness. |
Date | |
Source | Downloaded 2007-12-27 from Robert Hare (1840) A Compendium of the Course of Chemical Instruction in the Medical Department of the University of Pennsylvania, 4th Ed., Part 1, J.G. Auner, Philadelphia, p.49 on Google Books |
Author | Robert Hare |
Permission (Reusing this file) |
Public domain - published in the USA before 1923 |
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editPublic domainPublic domainfalsefalse |
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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.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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current | 08:29, 27 December 2007 | ![]() | 603 × 485 (37 KB) | Chetvorno (talk | contribs) | {{Information |Description=Drawing of electrophorus electrostatic generator, invented by Johan Carl Wilcke in 1764. Alterations: removed caption and part labels, increased brightness. |Source=Downloaded 2007-12-27 from [http://books.google.com/books?id=e |
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