Molecule. One of the invisible particles supposed to constitute matter of every kind; the smallest particle of matter that can exist independently. It is made up of atoms, but an atom cannot exist alone.
Morse Receiver. The receiving instrument once universally used in the Morse system of telegraphy, but now superseded by the sounder.
Morse Recorder. An apparatus which automatically records on a ribbon of paper the dots and dashes of the Morse telegraph alphabet.
Morse Sounder. An electro-magnetic instrument designed to make a sharp, clicking sound when its armature lever is drawn down by the attraction of the magnets.
Morse System. A telegraphic system invented by Prof. S. F. B. Morse, in which, by means of alternating makes and breaks of varying duration, the dots and dashes of the Morse alphabet are reproduced and received at a distance through the agency of wires and the electro-magnetic sounder.
Motor, Electric. A machine or apparatus for converting electric energy into mechanical kinetic energy or power. The electrical energy is usually generated by a dynamo, and distributed on conductors to motors located at various points.
Electric motors are of two types—the A-C., or alternating current, and the D-C., or direct current.
Motor-car, Electric. A self-propelling car driven by stored electricity.
Motor-dynamo. A motor driven by a dynamo whose armature is firmly attached or connected to that of the dynamo. It is used for modifying a current. If the dynamo generates an alternating current of high potential, the motor converts it into a direct current of lower voltage but increased amperage.
Motor-transformer. A transformer which is operated by a motor.