Electrophorus device

Forfatter/Opretter:

Robert Hare

Kredit:

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

Shortlink:

https://dkwiki.dk/b/32e5a

kilde:

Wikimedia Commons

størrelse:

603 x 485 Pixel (37632 Bytes)

beskrivelse:

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.

Licens:

Public domain

Kommentar på licensen:

Public domain - published in the USA before 1923