ack 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 space; a distance between.

Intensity. Strained or exerted to a high degree.

Interstices. The spaces between the molecules or atoms in a
substance.

Intermediate. Between.

Intermeshing. 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.

Inconsequential. Not of much importance.

Isometric. That view of a figure which will give the relation
of all the parts in their proper proportions.

Jaw. The grasping part of a vise, or other tool.

Joule. The practical unit of electrical energy.

Key-way. A groove in a shaft an