*Foot pounds.* A unit, usually determined by the number of pounds raised one foot in one second of time. 550 pounds raised one foot in one second of time, means 550 foot pounds. *Formation.* The act, or process of making, by the combination of materials. *Frictional.* The rubbing together of parts. *Fulcrum.* The point round which a lever turns. *Function.* Any specific power of acting or operating that belongs to an agent. *Fundamental.* The first. The primitive order of anything, or of any act. *Gasket.* A small interposing substance, usually softer than the united particles, for the purpose of effecting a tight joint. *Gear Box.* A case or shell designed to hold the transmission, or other wheels, in a piece of mechanism. *Gear-Shifting.* The mechanism for changing the speed gears in an automobile. *Globules.* Small particles of liquid. *Gravity.* The attraction of mass for mass; weight; the accelerating tendency of material to move toward the earth. *Graphite.* A form of carbon. A natural product especially used as a dry lubricant. *Ground carbon.* Usually gas coke. *High tension.* An electric current which has an exceedingly high voltage. *Herring bone.* A term applied to various mechanical structures. It is primarily made up of a rib from which a number of small spines branch out in opposite directions. *Hood.* The covering or enclosure at the forward part of an automobile, within which the engine is placed. *Housing.* Any enclosure, or covering. *Hummock.* A rising, more or less pronounced, in the roadway. *Hydro-carbon.* Usually applied to a gas evolved from gasoline. This substance has from 80 to 83 per cent. of carbon, and from 12 to 15 per cent. of hydrogen. *Hydrogen.* One of the lightest elementary substances. Two-thirds of water is hydrogen.