Image: Electrostatic friction machines
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Description: A cylinder friction electric machine and a disk electric friction machine.
Title: Electrostatic friction machines
Credit: 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: Golding Bird
Usage Terms: Public domain
License: PD
Attribution Required?: No
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