The mathematical expression of a property of a point in space, measuring the tendency which existing electric forces would have to drive an electrified unit particle away from or prevent its approach to the point in question, according to whether the point was situated at or was at a distance from the point in question. [...]

A difference of potential in a circuit, or in part of a circuit, which difference produces or is capable of producing a current, or is due to the flow of such current. It may be expressed as the fall in potential or the electro-motive force included between any two points on a circuit. The current [...]

If of any two points the absolute potentials are determined, the difference between such two expresses the potential difference. Numerically it expresses the quantity of work which must be done to remove a unit of electricity from one to the other against electric repulsion, or the energy which would be accumulated in moving it the [...]

Unchanging potential or potential difference. The ordinary system of incandescent lighting is a constant potential system, an unvarying potential difference being maintained between the two leads, and the current varying according to requirements.

The absolute electrical potential at a point possesses a numerical value and measures the tendency which the existing electric forces would have to drive an electrified particle away from or prevent its approach to the point, if such a particle, one unit in quantity, were brought up to or were situated at that point. It [...]

Potential in general may be treated as an attribute of a point in space, and may express the potential energy which a unit mass would have if placed at that point. This conception of potential is that of a property attributable to a point in space, such that if a unit mass were placed there [...]

Many pieces of electric apparatus of English manufacture are thus qualified, indicating that they are of the pattern of the apparatus used by the British Post Office in its telegraph department.

The kind of electricity with which a piece of glass is charged when rubbed with silk; vitreous electricity. In a galvanic cell the surface of the copper or carbon plate is charged with positive electricity. (See Electrostatic Series.) According to the single fluid theory positive electrification consists in a surplus of electricity. [Transcriber's note: "Positive [...]

The direction which lines of force are assumed to take in the air or outer circuit from a positive to a negative region. It applies to electrostatic, to magnetic and to electro-magnetic lines of force.

An instrument for determining the position of objects which are to be fired at from forts. It is designed for use from forts situated on the water. Fiske’s position finder may be thus generally described. On a chart the channel is divided into squares, and the position finder determines the square in which a vessel [...]