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 and in the hub of a wheel, to receive therein a locking key.

Kilowatt

A unit of electrical power; one thousand watts.

Kinetic

Consisting of motion.

Lacing

The attaching of the ends of a belt to each other.

Lap

A tool, usually of copper or lead, on which flour emery is spread, with oil, and used to grind out the interior of cylinders.

Lapping

The act of using a lap to grind out cylinders.

Lacquer

A varnish for either wood or metal.

Lazy-tongs

A form of tool, by means of which a long range of movement is attainable, and great grasp of power.

Levigated

Reduced to a fine powder.

Litharge

A form of lead used in paints for drying purposes.

Longitudinal

Lengthwise.

Luminous

That which has the capacity to light up.

Magnet

A bar of iron or steel that has electricity in it capable of attracting certain metals.

Manipulation

Capable of being handled.

Mandrel

The revolving part of a lathe; a rod or bar which turns and carries mechanical elements thereon.

Manually

Operated by hand.

Margin

An edge.

Malleability

Softness. The state of being formed by hammering.

Magnetism

A quality of certain metals to receive and hold a charge of electricity.

Major axis

The measurement across the longest part of an ellipse.

Minor axis

The distance across the narrowest part of an ellipse.

Meridian

The time when the sun crosses the middle of the heavens; midday.

Metric

Measure; a system which takes the unit of its measurement from the circumference of the earth.

Micrometer

A tool for measuring small spaces or intervals.

Milling machine

A large tool for the purpose of cutting gears and grooves or surfaces.

Miter

A meeting surface between two right-angled pieces.

Momentum

That quality of matter which is the combined energy of mass and speed.

Molecular

Any substance that is made up of any particles; the component elements in any substance.

Modifications

Changes; improved arrangements.