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The end of a shaft or arbor which rests and turns in a support; as, the pivot of an arbor in a watch.

The operation of finding, by means of a mine dial, the place where to sink an air shaft, or to bring an adit to the work, or to find which way the lode inclines.

The aftershaft of a feather. See Illust. under Feather.

To represent by a portrait, or as by a portrait; to portray. [R.] Shaftesbury.

Knight of the post. See under Knight. -- Post hanger (Mach.), a bearing for a revolving shaft, adapted to be fastened to a post. -- Post hole, a hole in the ground to set the foot of a post in. -- Post mill, a form of windmill so constructed that the whole fabric rests on a vertical axis firmly fastened to the groun…

her for brickmaking or the fine arts; a clay mill. It consists essentially 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.

, Quarter turn belt (Mach.), an arrangement in which a belt transmits motion between two shafts which are at right angles with each other. -- Quarter watch (Naut.), a subdivision of the full watch (one fourth of the crew) on a man-of- war. -- To give, or show, quarter (Mil.), to accept as prisoner, on submission in b…

A cycle having five crank shafts and adapted for five riders, all of whom can assist in the propulsion.

plete wheel. The semiradial engine has radiating cylinders on only one side of the crank shaft.

azard. Counsels, when they fly At random, sometimes hit most happily. Herrick. O, many a shaft, at random sent, Finds mark the archer little meant ! Sir W. Scott.

A piece of wood hafted into a long stick, and serving to beat out mortar. Elmes.

The shaft of a feather. The rhachis of the after-shaft, or plumule, is called the hyporhachis.

The part of a harness which passes over the saddle, and supports the shafts of a cart; -- called also ridgerope, and ridger. Halliwell.

A shaft excavated from below upward.

Same as Rock shaft. Rocker arm (Mach.), an arm borne by a rock shaft. To be off one's rocker, to be insane.

Having a swaying, rolling, or back-and-forth movement; used for rocking. Rocking shaft. (Mach.) See Rock shaft.

; as, rotary motion. Rotary engine, steam engine in which the continuous rotation of the shaft is produced by the direct action of the steam upon rotating devices which serve as pistons, instead of being derived from a reciprocating motion, as in the ordinary engine; a steam turbine; -- called also rotatory engine. --…

A sort of arrow. [Obs.] All sorts, flights, rovers, and butt shafts. B. Jonson. At rovers, at casual marks; hence, at random; as, shooting at rovers. See def. 5 (a) above. Addison. Bound down on every side with many bands because it shall not run at rovers. Robynson (More's Utopia).

A collar on a shaft ot other piece to prevent endwise motion. See Illust. of Collar.

The shaft of a column.