Motors Part 23

=Mangle.= A machine for smoothing out clothing, goods, etc.

=Magneto.= A dynamo which has the field pieces, or poles made of permanent magnets.

=Magnetism.= That quality, or agency by virtue of which certain bodies are productive of magnetic force.

=Manifestation.= Showing or explaining a state of things; an outward show.

=Make and Break.= An ignition system, which provides for throwing in and cutting out an electric circuit.

=Manifold.= A system of piping whereby the exhausts of a gasoline engine are brought together into one common discharge.

=Manganese.= A hard, brittle, grayish white metallic element, used in the manufacture of paints and of gla.s.s, and also for alloying metals.

=Manually.= Doing things by hand; muscular activity.

=Material.= Substances and parts from which articles are made.

=Mechanically.= Doing things by means of machinery, or in some regular order.

=Mobility.= The capacity to move about.

=Multiple.= A figure used a certain number of times, is said to be a multiple of a number, if it will divide the number equally.

Thus 4 is a multiple of 16; 3 is a multiple of 9, and so on.

=Neutral.= Neither; not in favor of any party or thing.

=Normal.= As usual; in the regular way; without varying from the ordinary manner.

=Ohm's Law.= In electricity, it is expressed as follows: 1. The current strength is equal to the electromotive force divided by its resistance. 2. The electromotive force is equal to the current strength multiplied by the resistance. 3. The resistance is equal to the electromotive force divided by the current strength.

=Oscillating.= Moving to and fro, like a pendulum.

=Orifice.= An opening; a hole.

=Organism.= Any part of the body, or any small germ or animalcule.

=Oxidation.= The action of air or oxygen on any material, is called oxidation. Thus rust on iron is called oxidation.

=Oxygen.= A colorless, tasteless gas, the most important in nature, called the acid-maker of the universe, as it unites with all substances, and produces either an acid, an alkali, or a neutral compound.

=Parallel.= Two lines are said to be parallel, when they are lying side by side and are equally distant from each other from end to end.

=Pendulum.= A bar suspended at one end to a pivot pin, and having its lower end free to swing to and fro.

=Penstock.= A reservoir designed to receive and discharge water into a turbine or other form of water wheel.

=Permanent.= That which will last; not easily stopped.

=Pestle.= An implement of stone or metal used for breaking and grinding up chemicals, and other material in a mortar.

=Petroleum.= A liquid fuel product, found in many places, its component parts being about 15 per cent. hydrogen and 85 per cent.

carbon.

=Perimeter.= The outer rim, or circle.

=Piston.= That part of an engine which is attached to the piston rod.

=Pinion.= A small gear wheel driven by a larger gear wheel.

=Platinum.= An exceedingly hard metal, used in places for electrical work where the current is liable to burn out ordinary conductors.

=Polarity.= The quality of having opposite poles.

=Pre-heating.= To heat before the ordinary process of heating commences.

=Ponderous.= Large; heavy; difficult to handle.

=Port.= In nautical parlance the left side of a vessel; the larboard side; also an opening, or a conduit for the transmission of gas or liquid.

=Pop valve.= A valve designed to open and allow escape of the imprisoned gases when the latter reach a certain pressure.

=Potential.= The power; the term used in electricity to denote the energy in a motor.

=Plurality.= More than one; many.

=Precipice.= A high and very steep cliff.

=Pressure.= The act of one body placed in contact with another and acting against it or against each other.

=Precaution.= Taking great care; being a.s.sured of safety.

=Primary A cell, or a number of cells, made battery.= of pairs of metallic couples, immersed in an electrolyte of either an acid or an alkali.

=p.r.o.ney Brake.= A device for testing machinery and determining power, by means of friction.

=Primeval.= The earliest; the first; of a low order.

=Proportion.= The relation of one thing or number, to another; comparative merit.

=Proximity.= Close to; near at hand.

=Quadruple.= Four times.

=Rack.= A bar having a number of teeth, to serve as a step or measure for a pawl, or a toothed wheel.