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The amount of retardation of anything, as of a valve in a steam engine, in opening or closing.

The clothing (esp., an outer, wooden covering), as of a steam cylinder, applied to prevent the radiation of heat; a covering of lags; -- called also deading and cleading.

A lake steamer or canal boat.

. A steam boiler having two flues which contain the furnaces and extend through the boiler from end to end.

, to separate the packing into two parts and form a chamber between for the reception of steam, etc. ; -- called also lantern brass.

ap weld, a lap joint made by welding together overlapping edges or ends. -- Inside lap (Steam Engine), lap of the valve with respect to the exhaust port. -- Outside lap, lap with respect to the admission, or steam, port.

of the largest size belonging to a ship of war; also, an open boat of any size driven by steam, naphtha, electricity, or the like. Launching ways. (Naut.) See Way, n. (Naut.).

e width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke.

by a rock shaft, and imparting motion to a puppet valve; -- used in the engines of river steamboats. -- Lifting sail (Naut.), one which tends to lift a vessel's bow out of water, as jibs and square foresails.

on works and between which and the outer shell of the cylinder a space is left to form a steam jacket.

e or motion, especially a short connecting rod with a bearing at each end; specifically (Steam Engine), the slotted bar, or connecting piece, to the opposite ends of which the eccentric rods are jointed, and by means of which the movement of the valve is varied, in a link motion.

ests, and which travels around a circular track when the bridge or table turns. -- Live steam , steam direct from the boiler, used for any purpose, in distinction from exhaust steam. -- Live stock, horses, cattle, and other domestic animals kept on a farm. whole body.

The work done by a steam engine or other prime mover when working. Load line, or Load water line (Naut.), the line on the outside of a vessel indicating the depth to which it sinks in the water when loaded.

A locomotive engine; a self-propelling wheel carriage, especially one which bears a steam boiler and one or more steam engines which communicate motion to the wheels and thus propel the carriage, -- used to convey goods or passengers, or to draw wagons, railroad cars, etc. See Illustration in Appendix. Consolidation lo…

A record and tabulated statement of the work done by an engine, as of a steamship, of the coal consumed, and of other items relating to the performance of machinery during a given time.

Having, employing, or exerting, a low degree of pressure. Low- pressure steam engine, a steam engine in which low steam is used; often applied to a condensing engine even when steam at high pressure is used. See Steam engine.

a piston acting on the beam between the center and the flywheel end, using high-pressure steam and working as a compound engine, -- a plan introduced by M'Naught, a Scottish engineer, in 1845.

strength, by sheer strength; as, to lift a heavy weight by main strength. -- Main beam (Steam Engine), working beam. -- Main boom (Naut.), the boom which extends the foot of the mainsail in a fore and aft vessel. -- Main brace. (a) (Mech.) The brace which resists the chief strain. Cf. Counter brace. (b) (Naut.) The…

A hole through which a man may descend or creep into a drain, sewer, steam boiler, parts of machinery, etc., for cleaning or repairing.

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, o…