Part 211

Res"o*na`tor (?), n. [NL. & G.] Anything that resounds or resonates; specif.: (a) (Teleg.) An open box for containing a sounder and designed to concentrate and amplify the sound. (b) (Elec.) Any of various apparatus for exhibiting or utilizing the effects of resonance in connection with open circuits, as a device having an oscillating circuit which includes a helix of bare copper wire, a variable number of coils of which can be connected in circuit with a condenser and spark gap excited with an induction coil. It is used to create high-frequency electric brush discharges. (c) (Wireless Teleg.) The antenna system and other high-frequency circuits of a receiving apparatus.

Re*sorp"tion (r*sôrp"shn), n. (Petrography) The redissolving wholly or in part, in the molten magma of an igneous rock, of crystals previously formed. The dissolved material may again solidify, giving rise to a mass of small crystals, usually of a different kind.

||Res"sal*dar (rs"sal*där), n. [Hind. risldr, fr. risl troop of horse + Per. dr holding.] (Mil.) In the Anglo-Indian army, a native commander of a ressala.

Rest cure. (Med.) Treatment of severe nervous disorder, as neurasthenia, by rest and isolation with systematic feeding and the use of massage and electricity.

Re*tard"er (r*tär"dr), n. 1. (Steam Boiler) Any of various devices, as a helix of flat metal strip, introduced into a boiler tube to increase the heating effect of the fire.

2. (Photog.) A substance, as potassium bromide, added to a developer to retard its action.

||Re*trous`sé" (?), a. [F., p.p. of retrousser to turn up.] Turned up; -- said of a pug nose.

||Re*vers" (?), n.sing & pl. [F. See Reverse, n.] (Dressmaking, Tailoring, etc.) A part turned or folded back so as to show the inside, or a piece put on in imitation of such a part, as the lapel of a coat.

||Rez`-de-chaus`sée" (?), n. [F., lit., level of the street. See Raze, v. t., and Causey.] (Arch.) The ground story of a building, either on a level with the street or raised slightly above it; -- said esp. of buildings on the continent of Europe.

Tier above tier of neat apartments rise over the little shops which form the rez-de-chaussée.

The Century.

Rhe"o*crat (?), n. [Gr. "rei^n to flow + kratei^n to rule.] (Elec.) A kind of motor speed controller permitting of very gradual variation in speed and of reverse. It is especially suitable for use with motor driven machine tools.

||Ri*dot"to (?), n. [See Redoubt.] (Music) An arrangement or abridgment of a piece from the full score.

||Ri*fa`ci*men"to (?), n.; pl. Rifacimenti (#). [It.] A remaking or recasting; an adaptation, esp. of a literary work or musical composition.

Rif"fle (?), n. [Cf. Riffle a trough.] A ripple in a stream or current of water; also, a place where the water ripples, as on a shallow rapid. [Local, U. S.]

The bass have left the cool depth beside the rock and are on the riffle or just below it.

James A. Henshall.

Rig"ger, n. (Painting) A long slender, and pointed sable brush for making fine lines, etc.; -- said to be so called from its use by marine painters for drawing the lines of the rigging.

Rig`o*lette" (?), n. [Prob. fr. Rigolette, name of a girl in Eugene Sue's novel "Mystères de Paris."] A woman's light scarflike head covering, usually knit or crocheted of wool.

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Rig"or*ism (?), n. [Cf. F. rigorisme.] (Ethics) Strictness in ethical principles; -- usually applied to ascetic ethics, and opposed to ethical latitudinarianism.

||Rigs"dag (?), n. [Dan. Cf. Reichstag.] See Legislature, Denmark.

Rim"-fire` (?), a. Having the percussion fulminate in a rim surrounding the base, distinguished from center-fire; -- said of cartridges; also, using rim-fire cartridges; as, a rim-fire gun. Such cartridges are now little used.

||Rin*con" (?), n.; pl. Rincones (#). [Sp. rincón.] An interior corner; a nook; hence, an angular recess or hollow bend in a mountain, river, cliff, or the like. [Western & Southern U. S.] D. S. Jordan.

Ring armature. (Elec.) An armature for a dynamo or motor having the conductors wound on a ring.

Ring winding. (Elec.) Armature winding in which the wire is wound round the outer and inner surfaces alternately of an annular or cylindrical core.

Rip cord. (Aëronautics) A cord by which the gas bag of a balloon may be ripped open for a limited distance to release the gas quickly and so cause immediate descent.

{ Rip"per act or bill }. An act or a bill conferring upon a chief executive, as a governor or mayor, large powers of appointment and removal of heads of departments or other subordinate officials. [Polit. Cant, U. S.]