Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 51
g plate moves. Opposite these armaturesand separated from them by the revolving plate, are twometallic combs, connected respectively with the two knobsand Leyden jars shown in the front of the picture. One ofthese knobs is carried by a sliding rod so that their distanceapart is easily adjusted.… … FRICTIONAL ELECTRICITY. ZZl 349. Action of the Holtz Machine.—To un-derstand the action of this machine requires careful atten-tion. The knobs are placed in contact and a small initialcharge is given to one of the armatures by some chargedbody, as a piece of vulcanite or a glass rod. The handleis…
Electricity · Magnetism
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