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urse of action; not dependent; at liberty. That which has the power, or not the power, to operate, is that alone which is or is not free. Locke.

d or rotated backwards. Freewheelcycles are usually fitted with hub brakes or rim brakes, operated by back pedaling.

broad-brimmed hat, usually of straw or felt. -- Gypsy winch, a small winch, which may be operated by a crank, or by a ratchet and pawl through a lever working up and down.

able genera are rarer than is generally supposed, even in gardens where they are so often operated upon, under circumstances most favorable to the production of hybrids. J. D. Hooker.

tar made of hydraulic lime, which will harden under water. -- Hydraulic elevator, a lift operated by the weight or pressure of water. -- Hydraulic jack. See under Jack. -- Hydraulic lime, quicklime obtained from hydraulic limestone, and used for cementing under water, etc. -- Hydraulic limestone, a limestone which…

That which moves or influences the mind, or operates on the passions; that which incites, or has a tendency to incite, to determination or action; that which prompts to good or ill; motive; spur; as, the love of money, and the desire of promotion, are two powerful incentives to action. The greatest obstacles, the great…

The amount or degree of energy with which a force operates or a cause acts; effectiveness, as estimated by results produced.

epresent the pressures corresponding to changes of temperature when the volume of the gas operated on is constant. -- I`so*chor"ic (#), a.

any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack.

n; usually, a removable metal instrument fitted to the mechanism of a particular lock and operated by turning in its place.

See Knop. Knob latch, a latch which can be operated by turning a knob, without using a key.

eadle worked by the foot. -- Geometric lathe. See under Geometric -- Hand lathe, a lathe operated by hand; a power turning lathe without an automatic feed for the tool. -- Slide lathe, an engine lathe. -- Throw lathe, a small lathe worked by one hand, while the cutting tool is held in the other.

A secondary shaft, as in a sliding change gear for an automobile; a cam shaft operated by a two-to-one gear in an internal- combustion engine. It is generally a shaft moving more or less independently of the other parts of a machine, as, in some marine engines, a shaft, driven by a small auxiliary engine, for independe…

One who or operates a machine; a machinist. [R.]

To treat, work, or operate with the hands, especially when knowledge and dexterity are required; to manage in hand work; to handle; as, to manipulate scientific apparatus.

er end. The mirror is pivoted so that it can be moved in one direction by a small plunger operated by an elastic metal diaphragm which closes a tube connected with the engine cylinder. It is also moved at right angles to this direction by a reducing motion, called a reproducer, so as to copy accurately on a smaller sca…

Made and operated by interaction of forces without a directing intelligence; as, a mechanical universe.

A medicine that operates through the nose; an errhine. [Archaic]

itary engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery. Fairholt.

That which is operated or accomplished; an effect brought about in accordance with a definite plan; as, military or naval operations.