Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 64
or other stiffgrease is spread upon them, and the amalgam, previouslyreduced to a fine powder, is sifted over* the surface. All points should be avoided in apparatus forfrictional electricity except where they are desired, likethe collecting spikes on the prime conductor, to let offa charge of… … —With the abundant supply of electricity afforded bythe electrical machine, many pleasing and instructiveexperiments are possible. The phenomena of attrac- tt07t a7id reptdsion can beshown upon a large scale.Fig. 25 represents a deviceknown as the electricchimes,^ in which two smallbrass balls hung…
Electricity · Magnetism
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