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Having a straight shaft with whorls of spines; -- said of certain sponge spicules. See Illust. under Spicule.

nder Tumbling. -- Scouring cinder (Metal.), a basic slag, which attacks the lining of a shaft furnace. Raymond. -- Scouring rush. (Bot.) See Dutch rush, under Dutch. -- Scouring stock (Woolen Manuf.), a kind of fulling mill.

g threads upon the opposite ends which wind in opposite directions. -- Screw alley. See Shaft alley, under Shaft. -- Screw bean. (Bot.) (a) The curious spirally coiled pod of a leguminous tree (Prosopis pubescens) growing from Texas to California. It is used for fodder, and ground into meal by the Indians. (b) The tr…

quiring to be adjusted by hand; -- said of a piece in machinery. Self-adjusting bearing (Shafting), a bearing which is supported in such a manner that it may tip to accomodate flexure or displacement of the shaft.

self. Self-contained steam engine. (a) A steam engine having both bearings for the crank shaft attached to the frame of the engine. (b) A steam engine and boiler combined and fastened together; a portable steam engine.

A feather which has a plumelike web, with the shaft of an ordinary feather.

A shaftment. [Scot.]

To separate suddenly into many small pieces or parts; to be shattered. There shiver shafts upon shields thick. Chaucer The natural world, should gravity once cease, . . . would instantly shiver into millions of atoms. Woodward.

The six-shafted bird of paradise. See Paradise bird, under Paradise.

The shaft or thill of a carriage. [Prov. Eng.]

nks. See Riser, n., 4. -- Sinking pump, a pump which can be lowered in a well or a mine shaft as the level of the water sinks.

etend to doubt of everything. [R.] To skepticize, where no one else will . . . hesitate. Shaftesbury.

gearing (Mach.), toothed gearing, generally resembling bevel gearing, for connecting two shafts that are neither parallel nor intersecting, and in which the teeth slant across the faces of the gears. -- Skew surface (Geom.), a ruled surface such that in general two successive generating straight lines do not intersect…

for by other game, as deer. As deer, being stuck, fly through many soils, Yet still the shaft sticks fast. Marston. To take soil, to run into the mire or water; hence, to take refuge or shelter. O, sir, have you taken soil here It is well a man may reach you after three hours' running. B. Jonson.

A platform in a shaft, especially one of those between the series of ladders in a shaft.

pointed weapon, used in war and hunting, by thrusting or throwing; a weapon with a long shaft and a sharp head or blade; a lance.

r indicating or recording the rate of a body's motion, as the number of revolutions of a shaft in a given time. -- Speed lathe (Mach.), a power lathe with a rapidly revolving spindle, for turning small objects, for polishing, etc.; a hand lathe. -- Speed pulley, a cone pulley with steps.

The shaft, mandrel, or arbor, in a machine tool, as a lathe or drilling machine, etc., which causes the work to revolve, or carries a tool or center, etc.

l species of swifts of the genus Acanthylis, or Chætura, and allied genera, in which the shafts of the tail feathers terminate in rigid spines.

nery, in which spiral gears, instead of bevel gears, are used to transmit motion between shafts that are not parallel. -- Spiral operculum, an operculum whih has spiral lines of growth. -- Spiral shell, any shell in which the whorls form a spiral or helix. -- Spiral spring. See the Note under Spring, n., 4.…