Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 91
siderable, a very feeblesource may supply a quantity of electricity to the con-denser without materially raising its potential, or causingthe gold leaves to diverge. But if the upper plate be lifted,the capacity of the lower plate diminishes enormously,and the potential of its charge rises as shown… … Fig. 51. 84 ELECTRICITY AND MAGNETISM part i densing electroscope that contact of dissimilar metals doesproduce electrification, a small compound bar made oftwo dissimilar metals — say zinc and copper — solderedtogether, is held in the moist hand, and one end of it istouched against the lower…
Electricity
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