object with the sides out of parallel.

Tangential. A line from the periphery of a circle which projects
out at an angle.

Tension. The exertion of a force.

Tenacity. The property of a material to hang together.

Tempering. Putting metal in such condition that it will be not
only hard but tough as well.

Technical. Pertaining to the strict forms and terms of an art.

Texture. That of which the element or substance is composed.

Threads. The ridges, spiral in form, which run around a bolt.

Theoretically. The speculative form or belief in a subject.

Tinned. The term applied to the coating on a soldering iron
with a fluxed metal.

Tines. Small blades.

Torsion. The force exerted around an object, like the action of
a crank on a shaft.

Tommy. A lever to be inserted in a hole in a screw head for
turning a screw.

Transmitting. Sending forth; to forward.

Trammel. A tool for the purpose of drawing ellipses.

Traction. Drawing; pulling power.

Tripping. A motion applied to a finger, which holds a pivoted
arm, whereby the latter may be swung from its
locked position.

Triangular. Having three sides and three angles.

Transverse. Across; at right angles to the long direction.

Undercut. A wall of a groove or recess which is sloping.

Undulatory. A wave-like motion, applied generally to light and
electricity.

Unit. A base for calculating from.

Unison. Acting together; as one.

Unsized. Generally applied to the natural condition of paper
or fabric which has no glue or other fixing substance
on it.

Vaporising. To change from a liquid or solid to a gas.

Variation. Changing into different conditions; unlike forms.

Verge. The edge; usually applied to the shoulder of a watch
spindle, particularly to the escapement.

Vertical. Up and down. The direction of a plumb line.

Velocity. The speed of an article through space.

Vitascope. An instrument for determining the rate of vibration of
different substances.

Vibration. The movement to and fro of all elements, and by means