Magnetism.—A condition which can be highly developed in iron and steel, by electric action or otherwise.
Measurement.—See Units.
Metre.—The French standard of length = 3·28 feet.
Meg Ohm.—The prefix meg signifies a million.
Millimetre.—The thousandth part of a metre.
Milliampère.—The thousandth of an ampère.
Mica-foil.—The fusible portion of a Hedges cut-out.
Multiple Arc.—Galvanic cells or dynamos connected parallel, or lamps so arranged that each furnishes a separate path for the current.
Negative.—In a machine the wire returning from the lamp. In a galvanic battery the copper, carbon, or platinum plate. Sign -.
Nigger.—An American term used to denote an electrical fault.