ain teeth are
removed.

Nautical. Marine; applied to shipping, and the like.

Neutralizes. Any substance, like a chemical, which, when added
to another chemical, will change them both.

Nitro-glycerine. An explosive made from glycerine and nitrogen.

Oblique. At an angle; inclined.

Obliterate. To wipe out.

Obvious. That which can be seen; easily observed.

Obtuse. A blunt angle; not noticeable.

Odophone. An instrument for determining and testing odors.

Olfactory. The nerves of the sense of smell.

Orifice. An opening; a hole.

Oscillation. A movement to and fro, like a pendulum.

Oxygen. The most universal gas, colorless and tasteless; is
called the acid-maker of the universe and unites
with all known substances, producing an acid, an
alkali, or a neutral compound.

Oxidizing. To impart to any substance the elements of oxygen.

Oxide. Any substance which has oxygen added to it.

Pallet. A part of a tooth or finger which acts on the teeth
of a wheel.

Parallel. Lines or sides at equal distance from each other from
end to end.

Paraffine. A light-colored substance, produced from refined
petroleum.

Perimeter. The outer margin of a wheel; the bounding line of any
figure of two dimensions.

Periphery. The outer side of a wheel.

Peen. The nailing end of a hammer.

Persistence. That quality of all matter to continue on in its
present condition.

Perpendicular. A line drawn at right angles to another.

Perpetual. Without end.

Perspective. A view of an object which takes in all parts at one
side.

Physically. Pertaining to the body.

Phonautograph. An apparatus for recording sound.

Phonograph. An apparatus for taking and sending forth sound
vibration.

Phenomena. Any occurrence in nature out of the ordinary.

Pitman. The rod or bar which connects the piston and crank.

Pivot. A point or bar on which anything turns.

Pinion. A small toothed wheel.

Pitch. The number of vibrations. The term used to give the
number of teeth in a wheel.

Pitch diameter. The poin