Motors Part 19

_Radiation_ has reference to the transference of heat from one body to another, either through a vacuum, the air, or even through a solid.

By means of the foregoing table, which gives the heats developed by the princ.i.p.al fuels, it is a comparatively easy matter to determine the calorific value of fuels, which is ascertained by making an a.n.a.lysis of the fuel.

The elements are then taken together, and the table used to calculate the value. Suppose, for instance, that the a.n.a.lysis shows that the fuel has seventy-five per cent. of carbon and twenty-five per cent. of hydrogen. It is obvious that if we take seventy-five per cent. of 8,137 (which is the index for carbon), and twenty-five per cent. of 43,500 (the index of hydrogen), and adding the two together, the result, 14,727, would represent the calorific value of the fuel.

GLOSSARY OF WORDS

USED IN TEXT OF THIS VOLUME

=Absolute.= Independent; free from all limitations.

=Amplitude.= Greatness of extent; the state or quality of being sufficient.

=Absorbent.= A material which will take up a liquid.

=Absorbing.= Taking up, or taking in.

=Absorption.= The act or process of taking up or fully occupying.

=Abutment.= A wall; a stop.

=Accuracy.= Correctness; positiveness.

=Accession.= Added to; addition, or increase.

=Accelerate.= Quickened; hurried.

=Accessible.= Available; capable of being reached.

=Accelerated.= A quickening, as of process or action.

=Actuating.= Moved or incited by some motive.

=Advance Spark.= The term applied to the movement of the mechanism in an internal combustion engine, which will cause the electric spark to act before the crank has pa.s.sed the dead center.

=Aeration.= To add air; to impregnate with oxygen.

=Alkali.= In chemistry it is known as a compound of hydrogen and oxygen, with certain chemicals. Anything which will neutralize an acid.

=Allusion.= Referring to; noticed.

=Anomaly.= A deviation from an ordinary rule; irregular.

=Adhesion.= To cling to; to stick together.

=Adjustment.= To arrange in proper order; to set into working condition.

=Alternating A current which goes back and current.= forth in opposite directions; unlike a direct current which flows continuously in one direction.

=Ampere.= The unit of current; the term in which strength of current is measured. An ampere is an electromotive force of one volt through a resistance of one ohm.

=Amplitude.= The state or quality of being broad, or full.

=a.n.a.lysis.= The separation into its primitive or original parts.

=Annular.= Pertaining to or formed like a ring.

=Armature.= The part of a dynamo or motor which revolves, and on which the wire coils are wound.

=a.s.suming.= Taking on; considered to be correct or otherwise.

=Asphaltum.= A bituminous composition used for pavements, properly made from natural bitumen, or from asphalt rock.

=Atmospheric.= Referring to; noticed.

=Available.= Capable of being employed or used.

=Bearings.= The part in mechanism in which journals or spindles rest and turn.

=Bifurcated.= In two parts; branching, like a fork.

=Blow-off valve.= A valve so arranged that at certain pressures the valve will automatically open and allow the steam to escape from the boiler.

=Bombard.= An a.s.sault; an attack by shot or sh.e.l.l.

=Bonnet.= The cap of a valve, which is so arranged that while it permits the valve stem to turn, will also prevent leakage.

=b.u.t.terfly-valve.= A form of valve which is usually flat, and adapted to open out, or turn within the throat or pipe.

=Caloric.= Pertaining to heat.

=Cam.= A rotating wheel, or piece, either regular or irregular, non-circular, or eccentric.

=Carbon.= A material like c.o.ke, ground or crushed. It required high heat to burn it, and it is used for the burning material in electric arc lamps.

=Carbureter.= The device used to mix air and gaseous fuel in an internal combustion engine.

=Carbonized.= Put into a charred form; c.o.ke is carbonized coal; charcoal is carbonized wood.

=Carbureted.= Air or gas to which has been added the gaseous product of petroleum, or some distillate.

=Centripetal.= That which draws inwardly, or to the center, like the gravitational action of the earth.