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(Chem.), an ethereal salt or a salt of some hydrocarbon as the base; an ester. -- Ether engine (Mach.), a condensing engine like a steam engine, but operated by the vapor of ether instead of by steam.

Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work. Exhaust draught, a forced draught produced by drawing air through a place, as through a furnace, instead of blowing it through. -- Exhaust fan, a fan blower so arranged as to produce an exhaust draught…

comotive frame to the boiler while allowing lengthwise motion. -- Expansion valve (Steam Engine), a cut-off valve, to shut off steam from the cylinder before the end of each stroke.

also called a riser, deadhead, or simply feed or head Knight. -- Feed heater. (a) (Steam Engine) A vessel in which the feed water for the boiler is heated, usually by exhaust steam. (b) A boiler or kettle in which is heated food for stock. -- Feed motion, or Feed gear (Mach.), the train of mechanism that gives motion…

of his crime. Milton. We are fellows still, Serving alike in sorrow. Shak. That enormous engine was flanked by two fellows almost of equal magnitude. Gibbon.

r of balanced passenger cars around its rim; -- so called after G. W. G. Ferris, American engineer, who erected the first of its kind for the World's Columbian Exposition in Chicago in 1893.

niac. [U.S.] -- Fire clay. See under Clay. -- Fire company, a company of men managing an engine in extinguishing fires. -- Fire cross. See Fiery cross. [Obs.] Milton. -- Fire damp. See under Damp. -- Fire dog. See Firedog, in the Vocabulary. -- Fire drill. (a) A series of evolutions performed by fireman for practi…

A man who tends the fires, as of a steam engine; a stocker.

re the power communicated, or the resistance to be overcome, is variable, as in the steam engine or the coining press. See Fly wheel (below).

A suction valve or check valve at the lower end of a pipe; esp., such a valve in a steam-engine condenser opening to the air pump.

The platform for the engineer and fireman of a locomotive.

g manure, the fermentation yielding bottom heat for forcing plants; a hotbed. -- Forcing engine, a fire engine. -- Forcing fit (Mech.), a tight fit, as of one part into a hole in another part, which makes it necessary to use considerable force in putting the two parts together. -- Forcing house, a greenhouse for the…

forms part of a knuckle joint. -- In fork. (Mining) A mine is said to be in fork, or an engine to "have the water in fork," when all the water is drawn out of the mine. Ure. -- The forks of a river or a road, the branches into which it divides, or which come together to form it; the place where separation or union t…

To form by melting a metal, and pouring it into a mold; to cast. "Whereof to found their engines." Milton.

A four-stroke cycle, as the Otto cycle, for an internal- combustion engine. -- Four"-cy`cle, a.

adjacent pipes or ports may be made to communicate; formerly used as a valve in the steam engine, and now for various other purposes. In the illustration, a leads to the upper end of a steam engine cylinder, and b to the lower end; c is the steam pipe, and d the exhaust pipe.

th a loud report when run over by a train, and is used to provide a warning signal to the engineer.

llows top, gallows frame, etc. -- Gallows frame. (a) The frame supporting the beam of an engine.

The plaited hemp used for packing a piston, as of the steam engine and its pumps.

ometer for determining the relative elasticities of the vapor in the condenser of a steam engine and the air. -- Water gauge. (a) A contrivance for indicating the height of a water surface, as in a steam boiler; as by a gauge cock or glass. (b) The height of the water in the boiler. -- Wind gauge, an instrument for m…