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 136
of the molecules, as jarring a bar of steelfacilitates its magnetization or accelerates its parting, when not ina magnetic field, with its permanent or residual magnetism. Forthis reason a permanent magnet should never be jarred, and per-mitting the armature to be suddenly .attracted and to strike…
Electricity
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