ot be maintained unless the point is kept sup-plied with electricity, as, for instance, from an electro-static machine such as is described later. If an electricwind is allowed to blow on an insulating surface, say glassor ebonite, such surface becomes charged with the. samekind of electricity as… … Fig. 10. edges, or points, save where a discharge is expressly de-sired. Of course the force of repulsion between the pointand the air particles is mutual. This is easily shownby the electric fly, a few light brass arms radiatinghorizontally from a hub pivoted on a conducting support,the outer…
Electronics · Electricity
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