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vator, a hoisting machine worked by compressed air. -- Pneumatic pile, a tubular pile or cylinder of large diameter sunk by atmospheric pressure. -- Pneumatic pump, an air-exhausting or forcing pump. -- Pneumatic railway. See Atmospheric railway, under Atmospheric. -- Pneumatic syringe, a stout tube closed at one e…

consisting of a flat wooden block with a long iron handle, used for flattening out split cylinders of blown glass.

A wooden flat-bottomed boat, a metallic cylinder, or a frame covered with canvas, India rubber, etc., forming a portable float, used in building bridges quickly for the passage of troops.

gh which a fluid, as steam, water, etc., may pass, as from a valve to the interior of the cylinder of a steam engine; an opening in a valve seat, or valve face. Air port, Bridle port, etc. See under Air, Bridle, etc. -- Port bar (Naut.), a bar to secure the ports of a ship in a gale. -- Port lid (Naut.), a lid or han…

admission, as of steam, to the engine cylinder before the back stroke is completed, thus increasing the cushioning.

ndividuals crowded together; They could not come nigh unto him for the press. Mark ii. 4. Cylinder press, a printing press in which the impression is produced by a revolving cylinder under which the form passes; also, one in which the form of type or plates is curved around a cylinder, instead of resting on a flat bed.…

The carrying over of water, with the steam, from the boiler, as into the cylinder. Priming of the tide. See Lag of the tide, under 2d Lag. -- Priming tube, a small pipe, filled with a combustible composition for firing cannon. -- Priming valve (Steam Eng.), a spring safety valve applied to the cylinder of a steam eng…

e of representing the sphere, the spherical surface being projected upon the surface of a cylinder touching the sphere, the point of sight being at the center of the sphere. -- Globular, Gnomonic, Orthographic, projection,etc. See under Globular, Gnomonic, etc. -- Mercator's projection, a mode of representing the sph…

of an upright shaft armed with projecting knives, which is caused to revolve in a hollow cylinder, tub, or vat, in which the clay is placed.

ansferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.

Any compound ascidian of the genus Pyrosoma. The pyrosomes form large hollow cylinders, sometimes two or three feet long, which swim at the surface of the sea and are very phosphorescent.

usually an internal-combustion engine of a certain type (the radial type) having several cylinders arranged radially like the spokes of a complete wheel. The semiradial engine has radiating cylinders on only one side of the crank shaft.

A vessel for receiving the exhaust steam from the high-pressure cylinder before it enters the low-pressure cylinder, in a compound engine.

the form of a cone on entering the crystal, from which it issues in the form of a hollow cylinder. This singular phenomenon was first discovered by Sir W. R. Hamilton by mathematical reasoning alone, unaided by experiment. -- Differential refraction (Astron.), the change of the apparent place of one object relative t…

Anything which resounds; specifically, a vessel in the form of a cylinder open at one end, or a hollow ball of brass with two apertures, so contrived as to greatly intensify a musical tone by its resonance. It is used for the study and analysis of complex sounds.

ulb of glass with a curved beak to enter a receiver for general chemical operations, or a cylinder or semicylinder of cast iron for the manufacture of gas in gas works. Tubulated retort (Chem.), a retort having a tubulure for the introduction or removal of the substances which are to be acted upon.

A ridge, fin, or wing, as on a plate, cylinder, beam, etc., to strengthen or stiffen it.

Furnished or formed with ribs; as, a ribbed cylinder; ribbed cloth.

ympathies with the Right on political questions. See Center, n., 5. -- Right cone, Right cylinder, Right prism, Right pyramid (Geom.), a cone, cylinder, prism, or pyramid, the axis of which is perpendicular to the base. -- Right line. See under Line. -- Right sailing (Naut.), sailing on one of the four cardinal poin…

A short cylinder connecting a trunnion with the body of a cannon. See Illust. of Cannon.