Electrification
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“Electrification produced by rubbing dissimilar bodies together and then separating them. If the insulated glass and leather discs A and B be rubbed together, but not separated, no signs of electrification can be detected; but if the discs be drawn apart a little distance the space betwen them is found to be and electric field, and as they separate farther and farther, electric forces will be found to exist in more and more of the surrounding space, the electrification being indicated by ‘lines of force.’ “ -Hawkins, 1917
Source
Hawkins and Staff Hawkins Electrical Guide Number One (New York: Theo. Audel and Company, 1917) 13
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