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r by a subject specially authorized. [Eng.] Bouvier. -- Free charge (Elec.), a charge of electricity in the free or statical condition; free electricity. -- Free church. (a) A church whose sittings are for all and without charge. (b) An ecclesiastical body that left the Church of Scotland, in 1843, to be free from co…

od. -- Friction gear. See Frictional gearing, under Frictional. -- Friction machine, an electrical machine, generating electricity by friction. -- Friction meter, an instrument for measuring friction, as in testing lubricants. -- Friction powder, Friction composition, a composition of chlorate of potassium, antimon…

Relating to friction; moved by friction; produced by friction; as, frictional electricity. Frictional gearing, wheels which transmit motion by surface friction instead of teeth. The faces are sometimes made more or less V-shaped to increase or decrease friction, as required.

A spectro-electric tube in which the decomposition of a liquid by the passage of an electric spark is observed. Knight.

A fusible plug that screws into a receptacle, used as a fuse in electric wiring.

uce explosion. -- Concussion fuze, a fuze ignited by the striking of the projectile. -- Electric fuze, a fuze which is ignited by heat or a spark produced by an electric current. -- Friction fuze, a fuze which is ignited by the heat evolved by friction. -- Percussion fuze, a fuze in which the ignition is produced b…

Of or pertaining to, or exhibiting the phenomena of, galvanism; employing or producing electrical currents. Galvanic battery (Elec.), an apparatus for generating electrical currents by the mutual action of certain liquids and metals; -- now usually called voltaic battery. See Battery. -- Galvanic circuit or circle. (E…

Electricity excited by the mutual action of certain liquids and metals; dynamical electricity.

To affect with galvanism; to subject to the action of electrical currents.

The art or process of depositing metals by electricity; electrotypy.

An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle. Differential galvanometer. See under Differental, a. -- Sine galvanometer, Cosine galvanometer, Tangent galvanometer (Elec.), a galvanometer in which the sine, cosine, or tangent respectively,…

The art or process of measuring the force of electric currents.

An instrument or apparatus for detecting the presence of electrical currents, especially such as are of feeble intensity.

Very penetrating rays not appreciably deflected by a magnetic or electric field, emitted by radioactive substances. The prevailing view is that they are non-periodic ether pulses differing from Röntgen rays only in being more penetrating.

A haulage system for canal boats, in which an electric locomotive running on a monorail has its adhesion materially increased by the pull of the tow rope on a series of inclined gripping wheels.

lectrodes, and containing some gas under very low tension, which becomes luminous when an electrical discharge is passed through it; -- so called from the name of a noted maker in germany. It is called also Plücker tube, from the German physicist who devised it.

A process similar to etching, in which, by means of voltaic electricity, a raised copy of a drawing is made, so that it can be used to print from.

A kind of dynamo-electric machine; -- so named from its French inventor, M. Gramme. Knight.

A conducting connection with the earth, whereby the earth is made part of an electrical circuit.

The order of fishes which includes the Gymnotus or electrical eel. The dorsal fin is wanting.