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The property by which one body, having electrical or magnetic polarity, causes or induces it in another body without direct contact; an impress of electrical or magnetic force or condition from one body on another without actual contact. Electro-dynamic induction, the action by which a variable or interrupted current o…

(Latin Ferrum). Atomic weight 55.9. Specific gravity, pure iron, 7.86; cast iron, 7.1. In magnetic properties, it is superior to all other substances.

Isodynamic lines (Magnetism), lines on the earth's surface connecting places at which the magnetic intensity is the same.

he surface of the globe, or upon a chart, connecting places at which the deviation of the magnetic needle from the meridian or true north is the same.

of a magnet, a piece of iron which connects the two poles, for the purpose of keeping the magnetic power undiminished; an armature.

A piece of magnetic iron ore possessing polarity like a magnetic needle. See Magnetite.

The loadstone; a species of iron ore (the ferrosoferric or magnetic ore, Fe3O4) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; -- called also natural magnet. Dinocrates began to make the arched roof of the temple of Arsinoë all of magnet, or this lo…

The property, quality, or state, of being magnetic; the manifestation of the force in nature which is seen in a magnet.

possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.

To communicate magnetic properties to; as, to magnetize a needle.

stering, by photography or otherwise, the states and variations of any of the terrestrial magnetic elements.

An instrument for measuring the intensity of magnetic forces; also, less frequently, an instrument for determining any of the terrestrial magnetic elements, as the dip and declination.

Pertaining to, or employed in, the measurement of magnetic forces; obtained by means of a magnetometer; as, magnetometric instruments; magnetometric measurements.

Pertaining to, or designating, a force producing magnetic flux, analogous to electromotive force, and equal to the magnetic flux multiplied by the magnetic reluctance.

at quantity of electricity of low tension, and hence adapted to the exhibition of electro-magnetic phenomena. [R.]

sitive. Metallic iron, iron in the state of the metal, as distinquished from its ores, as magnetic iron. -- Metallic paper, paper covered with a thin solution of lime, whiting, and size. When written upon with a pewter or brass pencil, the lines can hardly be effaced. -- Metallic tinking (Med.), a sound heard in the…

Fig.: A rich source of wealth or other good. Shak. Mine dial, a form of magnetic compass used by miners. -- Mine pig, pig iron made wholly from ore; in distinction from cinder pig, which is made from ore mixed with forge or mill cinder. Raymond.

See Magnetic needle, under Magnetic.

A tendency in the end of a magnetic needle to point to the north. Faraday.

The C.G.S. unit of magnetic reluctance or resistance, equal to the reluctance of a centimeter cube of air (or vacuum) between parallel faces. Also, a reluctance in which unit magnetomotive force sets up unit flux.