The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 425
pairs of in-sulated faces, one behind the other,so as to simultaneously introduce two loops into a circuit. Plug, Grid. A piece or mass of lead oxide, inserted into theholes in the lead plates of storage batteries. The holes are oftendovetailed or of uneven section to better retain the plugs. Plug… … Fig. 265. Plugs for ResistanceCoil Box.
Electricity
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