*Distilled.* A liquid which has been vaporized and condensed back into a liquid. *Dynamo.* An apparatus, consisting of field and core magnets, which, when the core is turned, will develop a current of electricity. *Effective.* Producing the best results. *Electrolyte.* Any material which is capable of being decomposed by an electric current. *Eliminate.* To take away from; to remove; to take out. *Elliptical.* A form which is in the shape of an ellipse. *Emergency.* At the last or critical moment. *Equipped.* Built with; arranged with all the elements. *Excessive.* Too much; more than normal. *Exhaust.* The discharge of the burnt gas from an internal combustion engine. *Expansion.* The term applied to the increases in volume by heat of a gas, or other substance. *Expansion line.* The line formed by the different pressures at various parts of the piston during the active stroke. *Explosion.* The burning and expansive force of a fuel. *Equalizer.* A mechanical element which is interposed between a moving and two or more moved parts to even up the force upon the moved parts. *Facility.* Ease; easiness in performing. *Fascination.* Attraction; an irresistible or powerful influence. *Field.* A term used to designate the magnetic influence of pole pieces which surround an armature in a dynamo or motor. *Fire test.* The determination of the point at which any substance will actually burst into flame. *Flash system.* A method of igniting substances. A leaping spark. *Flash point.* The temperature at which a fuel will flash but not burn. *Flexible.* Yielding; capable of being distorted. *Floating.* A condition in which a substance will not sink in a liquid.