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Acting by the agency of heat and magnetism; as, a pyromagnetic machine for producing electric currents.

A channel or guide along which a shuttle is driven back and forth, as in a loom, sewing machine, etc. Race cloth, a cloth worn by horses in racing, having pockets to hold the weights prescribed. -- Race course. (a) The path, generally circular or elliptical, over which a race is run. (b) Same as Race way, below. -- R…

A toothed machine drawn by a horse, -- used for collecting hay or grain; a horserake.

A machine for raking grain or hay by horse or other power.

t swiftness, but without actual waterfall or cascade; -- usually in the plural; as, the Lachine rapids in the St. Lawrence. Row, brothers, row the stream runs fast, The rapids are near, and the daylight's past. Moore.

the tool by back and forth movements of the brace handle. -- Ratchet drill, a portable machine for working a drill by hand, consisting of a hand lever carrying at one end a drill holder which is revolved by means of a ratchet wheel and pawl, by swinging the lever back and forth. -- Ratchet wheel (Mach.), a circular w…

Any machine or vehicle that does not run smoothly. [Colloq.] A. Trollope.

To cut with a sickle, scythe, or reaping machine, as grain; to gather, as a harvest, by cutting. When ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field. Lev.

A reaping machine.

A machine on which yarn is wound and measured into lays and hanks, -- for cotton or linen it is fifty-four inches in circuit; for worsted, thirty inches. McElrath.

The chamber, or tank, in which ice is formed, in an ice machine.

A machine for registering automatically the number of persons passing through a gateway, fares taken, etc.; a telltale.

ition; as, to regulate the temperature of a room, the pressure of steam, the speed of a machine, etc. To regulate a watch or clock, to adjust its rate of running so that it will keep approximately standard time.

A machine or implement for applying fresh primers to spent cartridge shells, so that the shells be used again.

y at an angle of 45°, and is held as in the illustration. -- To reverse an engine or a machine, to cause it to perform its revolutions or action in the opposite direction.

variation in speed and of reverse. It is especially suitable for use with motor driven machine tools.

A cylindrical pulley or drum in machinery. [R.]

n at that stage of development when it is fit to be eaten roasted. -- Roasting jack, a machine for turning a spit on which meat is roasted.

A red dyestuff, used as a substitute for cochineal, archil, etc. It consists of the sodium salt of a complex azo derivative of naphtol.

called also rock doo. -- Rock drill, an implement for drilling holes in rock; esp., a machine impelled by steam or compressed air, for drilling holes for blasting, etc. -- Rock duck (Zoöl.), the harlequin duck. -- Rock eel. (Zoöl.) See Gunnel. -- Rock goat (Zoöl.), a wild goat, or ibex. -- Rock hopper (Zoöl.), a…