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The steps or operations by which steam is supplied to and withdrawn from the cylinder at each stroke of the piston; viz., admission, suppression or cutting off, release or exhaust, and compression of exhaust steam prior to the next admission. Geographical distribution, the natural arrangements of animals and plants in…

esembling the dome or cupola of a building; as the upper part of a furnace, the vertical steam chamber on the top of a boiler, etc.

ing water into the boilers, raising heavy weights, and like purposes. -- Donkey pump, a steam pump for feeding boilers, extinguishing fire, etc.; -- usually an auxiliary. -- Donkey's eye (Bot.), the large round seed of the Mucuna pruriens, a tropical leguminous plant.

The difference between the speed of a screw steamer under sail and that of the screw when the ship outruns the screw; or between the propulsive effects of the different floats of a paddle wheel. See Citation under Drag, v. i., 3. Drag sail (Naut.), a sail or canvas rigged on a stout frame, to be dragged by a vessel thr…

A team of oxen or horses. Blackstone.

g an apartment by means of heat received from a stovepipe, or a cylindrical receiver for steam, etc.

ed also Zamboni's , from the names of the two earliest constructors of it. -- Dry pipe (Steam Engine), a pipe which conducts dry steam from a boiler. -- Dry plate (Photog.), a glass plate having a dry coating sensitive to light, upon which photographic negatives or pictures can be made, without moistening. -- Dry-pl…

Appointed or required to arrive at a given time; as, the steamer was due yesterday.

A locomotive with condensing engines, and, hence, without the noise of escaping steam; also, a dummy car.

utting tools, on opposite sides of the piece operated upon. -- Duplex pumping engine, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the other. -- Duplex querela Etym: [L., double complaint] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his im…

The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).

Pertaining to an eccentric; as, the eccentric rod in a steam engine.

Specifically: (Steam Boilers) An arrangement of pipes for heating feed water by waste heat in the gases passing to the chimney.

A jet jump for lifting water or withdrawing air from a space. Ejector condenser (Steam Engine), a condenser in which the vacuum is maintained by a jet pump.

property of expanding in all directions on the removal of external pressure, as the air, steam, and other gases and vapors. -- Elastic limit (Mech.), the limit of distortion, by bending, stretching, etc., that a body can undergo and yet return to its original form when relieved from stress; also, the unit force or str…

give vent to; to eject; to discharge; as, fire emits heat and smoke; boiling water emits steam; the sun emits light. Lest, wrathful, the far-shooting god emit His fatal arrows. Prior.

To equip with an engine; -- said especially of steam vessels; as, vessels are often built by one firm and engined by another.

One who manages as engine, particularly a steam engine; an engine driver.

aptain, and engineer in chief, ranking with commodore and having charge of the Bureau of Steam Engineering.

To draw along as a current does; as, water entrained by steam.