Series batteries are arranged with the zinc pole of one connected to the carbon pole of the next.

Series Arc Cut-out. A device by means of which a short circuit is established past a defective lamp, thereby securing the undisturbed operation of all the other lamps in the circuit.

Series Distribution. A distribution of electricity in which the receptive devices are arranged in successive order upon one conductor, extending the entire length of the circuit.

Series Dynamo. A series-wound dynamo.

Series Incandescent Lamp. An incandescent lamp adapted for service in a series circuit.

Series Motor. A motor adapted for use in a series circuit; a motor whose field-coil winding is in series with the armature.

Series, Multiple. An arrangement of electric apparatus in which the parts are grouped in sets in parallel, and these sets are connected in series.

Series Winding. A method of winding a generator or motor in which one of the commutator brush connections is joined to the field-magnet winding. The other end of the magnet winding is connected with the outer circuit, and the second armature brush is coupled with the remaining terminal of the outer circuit.

Service Wires. Wires connected to the supply circuit or main wires, and which run into buildings to supply current for heat, light, and power.

Shellac. A resin gum, gathered from certain Asiatic trees. It is soluble in alcohol, and is used extensively in electric work as an insulator.