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e reciprocal of a fraction is the fraction inverted, or the denominator divided by the numerator.

enerative influences. H. Bushnell. Regenerative furnace (Metal.), a furnace having a regenerator in which gas used for fuel, and air for supporting combustion, are heated; a Siemens furnace.

ture of goods. Blackstone. Rescue grass. Etym: [Etymol. uncertain.] (Bot.) A tall grass (Ceratochloa unioloides) somewhat resembling chess, cultivated for hay and forage in the Southern States.

A heavy, reverberatory sound; as, the roll of cannon, or of thunder.

A revolving reverberatory furnace.

The rotating part of a generator or motor.

The elastic fibrous skeleton of many species of horny Spongiæ (keratosa), used for many purposes, especially the varieties of the genus Spongia. The most valuable sponges are found in the Mediterranean and the Red Sea, and on the coasts of Florida and the West Indies.

Any one of several species of handsome gastropod shells of the genus Trochus, or Imperator. The shell is conical, with the margin toothed somewhat like the rowel of a spur.

To expel spirit from by heat, or to evaporate and condense in a refrigeratory; to distill. Tusser.

eing constricted. Line of striction (Geom.), the line on a skew surface that cuts each generator in that point of it that is nearest to the succeeding generator.

One who sends telegraphic messages; a telegraphic operator; a telegraphist.

istant point or points by means of alternating currents of electricity controlled by an operator who plays on a keyboard. The music is produced by a receiving instrument similar or analogous to the telephone, but not held to the ear. The pitch corresponds with frequency of alternation of current.

ch the denominator indicates the kind of note taken as time unit for the beat, and the numerator, the number of these to the measure.

will be exploded when touched by a vessel, or when an electric circuit is closed by an operator on shore.

An instrument for writing by means of type, a typewheel, or the like, in which the operator makes use of a sort of keyboard, in order to obtain printed impressions of the characters upon paper.

as, the windings (conducting wires) wound around the armature of an electric motor or generator. Winding engine, an engine employed in mining to draw up buckets from a deep pit; a hoisting engine. -- Winding sheet, a sheet in which a corpse is wound or wrapped. -- Winding tackle (Naut.), a tackle consisting of a fix…

ires, usually employing electric waves of high frequency emitted from an oscillator or generator, as in wireless telegraphy. A telephone transmitter causes fluctuations in these waves, it being the fluctuations only which affect the receiver.