An ampere meter connected in the circuit of the neutral wire to determine the current passing through it. Such determination is for the purpose of ascertaining how much more work is being done by one of the lateral leads than by the other. Synonym–Balance Ampere Meter.

The central wire in the three wire system, q. v., of electric distribution; the wire connected to a point between the two dynamos, or otherwise to the central point of the current generator.

An unpolarizable armature for use with a relay; an armature of soft iron or iron wire; as distinguished from a polarized armature.

A temperature marking a point of no thermo-electric difference of potential. If the junctions of a thermo-electric couple are at temperatures, one a little over and the other an equal amount under the neutral point, no current will be developed. At the neutral point the thermo-electric polarities are reversed. Differences of temperature above it give [...]

The points of a commutator at which no lines of force are cut; the points at the extremities of a diameter which, except for the lag, would be at right angles to the lines of force; the points at which the brushes touch the commutator.

The diameter of a commutator which connects its Neutral Points, q. v.; sometimes termed the diameter of commutation; the diameter approximately at right angles with the lines of force. The commutator brushes are applied at the extremities of this diameter.

Conductors in parallel and crossing each other, with connections at the junctions. The term is sometimes so loosely applied as to include parallel conductors.

Currents of electricity obtained from nerves. They are much more feeble than those obtained from muscle, but are produced in the same general ways.

In a voltaic cell the plate not dissolved by the solution; the one which is positively charged; the copper, platinum, or carbon plate in the usual type of battery. The current is assumed to flow from negative element to positive element (the zinc plate) through the wire or other external conductor.

The kind of electricity with which a piece of amber is charged by friction with flannel; resinous electricity. (See Electrostatic Series.) In a galvanic battery the surface of the zinc plate is charged with negative electricity. According to the single fluid theory negative electrification consists in a deficiency of electricity. [Transcriber's note: Negative electrification is [...]