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An engine, usually an internal-combustion engine of a certain type (the radial type) having several cylinders arranged radially like the spokes of a complete wheel. The semiradial engine has radiating cylinders on only one side of the crank shaft.

etal.), a furnace having a regenerator in which gas used for fuel, and air for supporting combustion, are heated; a Siemens furnace.

proceedings. -- Return flue, in a steam boiler, a flue which conducts flame or gases of combustion in a direction contrary to their previous movement in another flue. -- Return pipe (Steam Heating), a pipe by which water of condensation from a heater or radiator is conveyed back toward the boiler.

ojected through the air by the force arising from the expansion of the gases liberated by combustion of the composition. Rockets are used as projectiles for various purposes, for signals, and also for pyrotechnic display.

by electricity, compressed air, a spring, or an explosive gas), attached to an internal- combustion engine, as on an automobile, and used as a means of starting the engine without cranking it by hand.

Designating an internal-combustion engine of a type resembling the Diesel engine in using as fuel heavy oil which is injected in a spray just before the end of the compression stroke and is fired without electrical ignition. The fuel is sprayed into an iron box (called a hot bulb or hot pot) opening into the combustion…

The muffler of an internal-combustion engine.

To burn and smoke without flame; to waste away by a slow and supressed combustion. The smoldering dust did round about him smoke. Spenser.

A black substance formed by combustion, or disengaged from fuel in the process of combustion, which rises in fine particles, and adheres to the sides of the chimney or pipe conveying the smoke; strictly, the fine powder, consisting chiefly of carbon, which colors smoke, and which is the result of imperfect combustion.…

A small particle of fire or ignited substance which is emitted by a body in combustion. Man is born unto trouble, as hte sparks fly upward. Job v. 7.

An induction coil, esp. of an internal-combustion engine, wireless telegraph apparatus, etc.

In internal-combustion engines with electric ignition, a plug, screwed into the cylinder head, having through it an insulated wire which is connected with the induction coil or magneto circuit on the outside, and forms, with another terminal on the base of the plug, a spark gap inside the cylinder.

hout being planted, or without human labor; as, a spontaneous growth of wood. Spontaneous combustion, combustion produced in a substance by the evolution of heat through the chemical action of its own elements; as, the spontaneous combustion of waste matter saturated with oil. -- Spontaneous generation. (Biol.) See un…

A composition of substances which in combustion emit a suffocating odor; -- used formerly in naval warfare.

ilosophical explanation of phenomena, either physical or moral; as, Lavoisier's theory of combustion; Adam Smith's theory of moral sentiments. Atomic theory, Binary theory, etc. See under Atomic, Binary, etc.

Having three ports; specif.: Designating a type of two-cycle internal-combustion engine in which the mixture enters the crank case through a port uncovered by the piston near the end of its stroke.

An engine having a trunk piston, as most internal combustion engines.

A two-stroke cycle for an internal-combustion engine. --Two"- cy`cle, a.

Having two ports; specif.: Designating a type of two-cycle internal-combustion engine in which the admission of the mixture to the crank case is through a suction valve.

or the incandescent gas burner invented by him. -- Welsbach burner, a burner in which the combustion of a mixture of air and gas or vapor is employed to heat to incandescence a mantle composed of thoria and ceria. The mantle is made by soaking a "stocking" in a solution of nitrates of thorium and cerium (approx. 99 : 1…