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File:Electrophorus device.png

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Electrophorus_device.png(603 × 485 pixels, file size: 37 KB, MIME type: image/png)

Summary

Description
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

Licensing

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Date/TimeThumbnailDimensionsUserComment
current08:29, 27 December 2007Thumbnail for version as of 08:29, 27 December 2007603 × 485 (37 KB)Chetvorno{{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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