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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.

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 under…

A form of air pump in which exhaustion is produced by a stream of mercury running down a narrow tube, in the manner of an aspirator; -- named from the inventor.

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

ophical 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.

ired with toil, all hopes of safety past. Dryden. To tire out, to weary or fatigue to exhaustion; to harass.

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.

of being virile; developed manhood; manliness; specif., the power of procreation; as, exhaustion. "Virility of visage." Holland.

The quality or state of being weary or tried; lassitude; exhaustion of strength; fatigue. With weariness and wine oppressed. Dryden. A man would die, though he were neither valiant nor miserable, only upon a weariness to do the same thing so oft over and over. Bacon.

he 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), d…

Fig.: The lowest point; the point of exhaustion; as, his patience had nearly reached zero. Absolute zero. See under Absolute. -- Zero method (Physics), a method of comparing, or measuring, forces, electric currents, etc., by so opposing them that the pointer of an indicating apparatus, or the needle of a galvanometer,…