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An opening, road, or track, available for passing; especially, one through or over some dangerous or otherwise impracticable barrier; a passageway; a defile; a ford; as, a mountain pass. "Try not the pass!" the old man said. Longfellow.

Patch ice, ice in overlapping pieces in the sea. -- Soft patch, a patch for covering a crack in a metallic vessel, as a steam boiler, consisting of soft material, as putty, covered and held in place by a plate bolted or riveted fast.

A way, course, or track, in which anything moves or has moved; route; passage; an established way; as, the path of a meteor, of a caravan, of a storm, of a pestilence. Also used figuratively, of a course of life or action. All the paths of the Lord are mercy and truth. Ps. xxv. 10. The paths of glory lead but to the gr…

A footpath; a beaten track; any path or course. Also used figuratively. Shak. In the way of righteousness is life; and in the pathway thereof is no death. Prov. xii. 28. We tread the pathway arm in arm. Sir W. Scott.

and pearly luster, often having a spherulitic concretionary structure due to the curved cracks produced by contraction in cooling. See Illust. under Perlitic.

use on rough roads and to approximate to the smoothness in running of a wheel on a metal track. The tread consists of a number of rubber shod feet which are connected by ball-and-socket joints to the ends of sliding spokes. Each spoke has attached to it a small roller which in its turn runs under a short pivoted rail c…

and Spanish-American game played in a court, in which a ball is struck with a wickerwork racket.

the bulwarks, to hold belaying pins. Sometimes applied to the fife rail. Called also pin rack. -- Pin wheel. (a) A contrate wheel in which the cogs are cylindrical pins. (b) (Fireworks) A small coil which revolves on a common pin and makes a wheel of yellow or colored fire.

e that pyned him to death. Piers Plowman. One is pined in prison, another tortured on the rack. Bp. Hall.

gwheel with a small number of teeth, or leaves, adapted to engage with a larger wheel, or rack (see Rack); esp., such a wheel having its leaves formed of the substance of the arbor or spindle which is its axis. Lantern pinion. See under Lantern. -- Pinion wire, wire fluted longitudinally, for making the pinions of clo…

The track or tread a horseman makes upon the ground he goes over. Johnson.

ket wheel. -- Pitch line, or Pitch circle (Gearing), an ideal line, in a toothed gear or rack, bearing such a relation to a corresponding line in another gear, with which the former works, that the two lines will have a common velocity as in rolling contact; it usually cuts the teeth at about the middle of their heigh…

ing essentially of the unaltered proteid of milk. It is also used in making biscuits and crackers, for mixing with cocoa, etc. A mixture of this with butter, water, and salt is called Plasmon butter, and resembles clotted cream in appearance.

A switch made up of a rail from each track, both rails being tapered far back and connected to throw alongside the through rail of either track.

ony or a pair of ponies. -- Pony engine, a small locomotive for switching cars from one track to another. [U.S.] -- Pony truck (Locomotive Engine), a truck which has only two wheels. -- Pony truss (Bridge Building), a truss which has so little height that overhead bracing can not be used.

le gallinule. See under Gallinule. -- Purple copper ore. (Min.) See Bornite. -- Purple grackle (Zoöl.), the crow blackbird. See under Crow. -- Purple martin. See under Martin. -- Purple sandpiper. See under Sandpiper. -- Purple shell. See Ianthina.

it crabs. They sometimes weigh twenty pounds or more, and are very strong, being able to crack cocoanuts with the large claw. They chiefly inhabit the tropical islands of the Pacific and Indian Oceans, living in holes and feeding upon fruit. Called also palm crab. -- Purse net, a fishing net, the mouth of which may be…

See Racket.

A bar of steel or iron, forming part of the track on which the wheels roll. It is usually shaped with reference to vertical strength, and is held in place by chairs, splices, etc.

ting of one or more parallel series of iron or steel rails, patterned and adjusted to be tracks for the wheels of vehicles, and suitably supported on a bed or substructure.