the magnetic field of a magnet.

Armature Bar. The piece which holds the armature. Also one of a
series of bars which form the conductors in armature
windings.

Armature Coil. The winding around an armature, or around the core
of an armature.

Armature Core. The part in a dynamo or motor which revolves,
and on which the wire coils are wound.

Astatic (Galvanometer). That which has no magnetic action to direct
or divert anything exterior to it.

Atom. The ultimate particle of an elementary substance.

Attraction. That property of matter which causes particles to
adhere, or cohere, to each other. It is known under
a variety of terms, such as gravitation, chemical
affinity, electro-magnetism and dynamic attraction.

Automatic Cut-out. A device which acts through the operation of the
mechanism with which it is connected. It is usually
applied to a device which cuts out a current when it
overcharges or overloads the wire.

Bath. In electroplating, the vessel or tank which holds
the electroplating solution.

Battery. A combination of two or more cells.

Battery, Dry. A primary battery in which the electrolyte is made
in a solid form.

Battery, Galvanic. A battery which is better known by the name of the
Voltaic Pile, made up of zinc and copper plates
which alternate, and with a layer of acidulated paper
between each pair of plates.

Battery, Storage. A battery which accumulates
electricity generated by a primary battery or a
generator.

Brush. A term applied to the conducting medium that
bears against the cylindrical surface of a commutator.

Buzzer. An electric call produced by a rapidly moving
armature of an electro-magnet.

Cable. A number of wires or conductors assembled in one
strand.

Candle-power. The amount of light given by the legal-standard
candle. This standard is a sperm candle, which burns
two grains a minute.

Capacity. The carr