A unit constructed by the “Administration Suisse,” based on the same data as the Breguet and the Digney Units. (See Resistance, Digney Unit of) It is equal to 10.30 legal ohms.

When arc lamps are connected in parallel or multiple arc a small resistance coil is sometimes placed in series with each lamp for steadying purposes. It reduces the percentage of variation of resistance in each lamp, which may be caused by a change in the position of the carbons.

The counter-electro-motive force, q. v., operating to prevent a current being produced of what should be its full strength were the true resistance and actuating electro-motive force only concerned. Such counter-electro-motive force may be treated as a spurious resistance and such a value in ohms assigned to it as would correspond to its proper effect. [...]

The relative resistance of a substance. It is expressed as the actual resistance of a cube of the substance which is one centimeter on each edge. For metals it is usually expressed in microhms, for liquids in ohms. The resistances of a specified length of wire of specified diameter of different substances is often given, [...]

The resistance of a column of mercury 1 meter long and 1 square millimeter cross-sectional area at 0º C. (32º F.) It is equal to .9431 legal ohm.

The resistance of a conductor reduced to ohms, or to equivalent lengths of a column of mercury, 1 square millimeter in cross area.

True resistance measured in ohms as distinguished from counter-electro-motive force, q. v. The latter is called often spurious resistance. Synonym–True Resistance. [Transcriber's note: "True" vs. "spurious" are interesting terms, considering that today we define impedance as a combination of "real" resistance and "imaginary" capacitive and inductive reactance.]

The resistance of the human body is largely a matter of perfection of the contacts between its surface and the electrodes. It has been asserted that it is affected by disease. From 350 to 8,000 ohms have been determined as resistances, but so much depends on the contacts that little value attaches to the results.

A resistance with comparatively little or negligible self-induction.

The resistance of the portion of an electric circuit not within the generator; the same as external resistance. Synonym–External Resistance.