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Duty :: Duty (n.) 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)..

Spell :: Spell (n.) The relief of one person by another in any piece of work or watching; also, a turn at work which is carried on by one person or gang relieving another; as, a spell at the pumps; a spell at the masthead..

Receiver :: Receiver (n.) The glass vessel in which the vacuum is produced, and the objects of experiment are put, in experiments with an air pump. Cf. Bell jar, and see Illust. of Air pump..

Air Vessel :: Air vessel () A vessel, cell, duct, or tube containing or conducting air; as the air vessels of insects, birds, plants, etc.; the air vessel of a pump, engine, etc. For the latter, see Air chamber. The air vessels of insects are called tracheae, of plants spiral vessels..

Manometer :: Manometer (n.) An instrument for measuring the tension or elastic force of gases, steam, etc., constructed usually on the principle of allowing the gas to exert its elastic force in raising a column of mercury in an open tube, or in compressing a portion of air or other gas in a closed tube with mercury or other liquid intervening, or in bending a metallic or other spring so as to set in motion an index; a pressure gauge. See Pressure, and Illust. of Air pump..

Syringed :: Syringe (n.) A kind of small hand-pump for throwing a stream of liquid, or for purposes of aspiration. It consists of a small cylindrical barrel and piston, or a bulb of soft elastic material, with or without valves, and with a nozzle which is sometimes at the end of a flexible tube; -- used for injecting animal bodies, cleansing wounds, etc..

Bucket :: Bucket (n.) The valved piston of a lifting pump.

Scaphognathite :: Scaphognathite (n.) A thin leafike appendage (the exopodite) of the second maxilla of decapod crustaceans. It serves as a pumping organ to draw the water through the gill cavity.

Air Gun :: Air gun () A kind of gun in which the elastic force of condensed air is used to discharge the ball. The air is powerfully compressed into a reservoir attached to the gun, by a condensing pump, and is controlled by a valve actuated by the trigger..

Camel :: Camel (n.) A water-tight structure (as a large box or boxes) used to assist a vessel in passing over a shoal or bar or in navigating shallow water. By admitting water, the camel or camels may be sunk and attached beneath or at the sides of a vessel, and when the water is pumped out the vessel is lifted..

Forcer :: Forcer (n.) A small hand pump for sinking pits, draining cellars, etc..

Air Pump :: Air pump () A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space..

Limber :: Limber (n.) Gutters or conduits on each side of the keelson to afford a passage for water to the pump well.

Chapelet :: Chapelet (n.) A kind of chain pump, or dredging machine..

Penstock :: Penstock (n.) The barrel of a wooden pump.

Pie :: Pie (n.) An article of food consisting of paste baked with something in it or under it; as, chicken pie; venison pie; mince pie; apple pie; pumpkin pie..

Box :: Box (n.) A chamber or section of tube in which a valve works; the bucket of a lifting pump.

Single-acting :: Single-acting (a.) Having simplicity of action; especially (Mach.), acting or exerting force during strokes in one direction only; -- said of a reciprocating engine, pump, etc..

Elatrometer :: Elatrometer (n.) An instrument for measuring the degree of rarefaction of air contained in the receiver of an air pump.

Partner :: Partner (n.) A framework of heavy timber surrounding an opening in a deck, to strengthen it for the support of a mast, pump, capstan, or the like..

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