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| Keywords: Electrophorus device.png 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 Downloaded 2007-12-27 from http //books google com/books id eV-RqtbPZSwC pg PA49 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 1840 Robert Hare Public domain - published in the USA before 1923 PD-OLD Electrophorus device | ||||
