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 261
ush dis-charge consists of innumerable fine twig-like ramifications,presenting a form of which Fig. 108 gives a fine example.The brightness and, size of the brush is increased byholding a flat plate of metal a little way from it. Witha smaller ball, or with a bluntly pointed wire, the brush CHAP.… … Fig. 108. • is negative. Wheatstone found by using his rotatingmirror that the brush discharge is really a series ofsuccessive partial sparks at rapid intervals. If the blunt or rounded conductor be replaced by apointed one, the brush disappears and gives place to aquiet and continuous glow Where…
Electricity · Magnetism
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