Practical Mechanics for Boys Part 24

Float cut. The term when applied to a tool where the cut is an easy one.

Flexure. The springing yield in a substance.

Foot pound. A unit, usually determined by the number of pounds raised one foot in one second of time. 550 pounds raised one foot in one second of time, means so many foot pounds.

Formulate. To arrange; to put in order from a certain consideration of things.

Focus. The center of a circle.

Foci. One of the points of an ellipse.

Formation. The structure of a machine or of a compound.

Fractured. Broken.

Fundamental. Basis; the first form; the original structure.

Fulcrum. The resting place for a lever.

Fusion. Melting. The change of a metal from a solid to a liquid state by heat.

Fusible. That which is capable of being melted.

Fulminate. A substance that will ignite or explode by heat or friction.

Gamut. The scale of sound or light, or vibrations of any kind.

Gear. A toothed wheel of any kind.

Gelatine. A tasteless transparent substance obtained from animal tissues.

Globular. Having the form of a globe or ball.

Glazed. Having a glossary appearance.

Graphite. A metallic, iron-black variety of carbon.

Graduated. To arrange in steps; a regular order or series.

Grinder. Any mechanism which abrades or wears down a substance.

Gullet. The curved notches or grooves between projecting parts of mechanism.

Harmonizing. To make the various parts act together in unison.

H. P. The symbol for horse power.

Helico. A form resembling that of the threads of a screw.

Hexagon. Six-sided.

Heliograph. The system of signaling by using flashlights.

Horizontal. Things level with the surface of the earth; like the surface of water.

Hydrogen. The lightest of all the elements. A tasteless, colorless substance.

Import. To bear, or convey as a meaning.

Impulse. The application of an impelling force.

Impact. A collision; striking against.

Invariably. Constant; without failing.

Inertia. The quality of all materials to remain at rest, or to continue in motion, unless acted on by some external force.

Intersect. To divide at a certain point. The crossing point of one line over another.

Interval. A s.p.a.ce; a distance between.

Intensity. Strained or exerted to a high degree.

Interstices. The s.p.a.ces between the molecules or atoms in a substance.

Intermediate. Between.

Intermes.h.i.+ng. The locking together of gear wheels.

Internal. That which is within.

Inability. Unable to perform or do.

Initial. The first; at the start.

Increment. One of the parts which go to make up the whole.

Inference. Drawing a conclusion from a certain state of things.

Insoluble. A substance which cannot be liquefied by a liquid.

Indentations. Recesses, or cut-out parts or places.

Induction. The movement of electricity through the air from one conductor to another.

Inflammable. That which will burn.

Inclining. At an angle; sloping.