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 50
uppercomb, it.gives off + electricity and receives an equalamount of —. The charge of B is continually main-tained by friction with the rubber. When the dischargingrod and ball are brought near the prime conductor, asshown in the figure, a rapid succession of sparks is pro-duced, owing to the… … Fig. 143. 220 FRICTTONAL ELECTRICITY. or cylinder machine. It is less affected by atmosphericmoisture and is more compact^ but the vulcanite platesseem to deteriorate with use. They should be washedoccasionally with ammonia water and rubbed with paraf-fin oil. Machines of similar construction, but…
Electricity · Magnetism
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