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Any apparatus for making and breaking an electric circuit; a circuit breaker.

A genus of African siluroid fishes, including the electric catfishes. See Electric cat, under Electric.

treat of such phenomena as seem to depend on the laws both of mechanics and chemistry, as electricity and magnetism.

One of the larger measures of electrical capacity, amounting to one million farads; a macrofarad.

One of the larger measures of electrical resistance, amounting to one million ohms.

he prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.

One of the smaller measures of electrical currents; the millionth part of one ampère.

A measure of electrical quantity; the millionth part of one coulomb.

ing audible very feeble sounds. It produces its effects by the changes of intensity in an electric current, occasioned by the variations in the contact resistance of conducting bodies, especially of imperfect conductors, under the action of acoustic vibrations.

tive faculty." Bp. Wilkins. Motive power (Mach.), a natural agent, as water, steam, wind, electricity, etc., used to impart motion to machinery; a motor; a mover.

A prime mover; a machine by means of which a source of power, as steam, moving water, electricity, etc., is made available for doing mechanical work.

Driven or actuated by a motor, esp. by an individual electric motor. An electric motor forms an integral part of many machine tools in numerous modern machine shops.

r increasing by repetition or accumulation the intensity of a force or action, as heat or electricity. It is particularly used to render such a force or action appreciable or measurable when feeble. See Thermomultiplier.

consist. South. Negatively charged or electrified (Elec.), having a charge of the kind of electricity called negative.

Not conducting; not transmitting a fluid or force; thus, in electricity, wax is a nonconducting substance.

A substance which does not conduct, that is, convey or transmit, heat, electricity, sound, vibration, or the like, or which transmits them with difficulty; an insulator; as, wool is a nonconductor of heat; glass and dry wood are nonconductors of electricity.

The torpedo, which numbs by the electric shocks which it gives.

The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampére. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 109 units of res…

An electric wave meter.

Any device for producing electric oscillations; esp., an apparatus for generating electric waves in a system of wireless telegraphy.