effects send to Electrolysis.

Effects send. A mixing console out­put that sends a signal to the input of an effects device. Most mixing consoles have an effects send level control for each input position (channel) so the musical mix sent to the device can be adjusted; many consoles also have a master
effects send control. for the effects send bus.
Effervescence. The escape of bub­bles of gas from a liquid otherwise that by boiling.
Efficiency. Ratio of output to input power in a transducer. In speaker systems, the percentage of electri­cal input available as acoustic out­put.
Emorescence. (Chern.) The chang­ing, on the surface or throughout, to a powder as a result of loss of water or a crystallization. (Bldg.) The for­mation of a whitish powder on the face of a brick or stone wall.
Emuent. (Plumb.) The liquid dis­charged from a septic tank or sew­age disposal plant.
EDT. Extra High Tension. Eggshell finish. (Papermkg.) A finish given to uncoated papers either woven or laid, the surface texture resembling eggehell.
Ejector. (Shopwk.) On a punch-press, a right, collar, or disk actuated by spring pressure or by pressure of a rubber disk, to remove blanks from the interior of compound and other dies often called a "shedder."

Ejector pin. (Plast.) A device. at knocks a finished piece from a mold.
Elastic. (Engin.) That condition which permits of a deformation when force is appHed and a return to original shape on the removal of such force.
Elastic axis. (Aero.) The locus ofall points through which a force may be applied to a structure without

Electrical conductivity. The relative power of carrying the electric cur­rent possessesd by' dJferent sub­stances; the conducting povver of' pure copper being taken as a stand­ard.
Electrical engineer. One well versed in the theory and practice of the development and utilization of elec­trical energy.
Electric brazing. A group of brazing . processes wherein the heat is ob­tained from an electric current.
Electric current. The movement of free electrons through a conductor such as a metal wire.
Electric drill. Usually refers to the electrically operated, self-contained hand drill.
Electric field. The space around an electrical charged object where it can exert a force.
Electric horsepower. 746 watts.
Electrician. A person familiar with the theory and practical application of electricity.
Electricity. (Elee.) Current electricity is electrons in motion. Static elec­tricity is electrons at rest.
Electric motor. (Elee.) ,A machine for transforming electrical energy into mechanical power.
Electric potential. SEE ELECTROMO­TIVE.
Electric power. (Meeh. Engin.) The rate of doing work by electricity; measured in walts or kilowatts.

Electric pyrometer. A sensitive pyrometer for exact temperature measurements. It utilizes the changes in electrical resistance of platinum when heated.
Electric steel. (Metal.) High quality steel produced in an electric fur­nace by a method vvhich eliminates most of the sulphur and phospho­rus. A cleaner steel with fewer defects is produced by this system than by most other methods.
Electrification. (Elec.) Charging a body with electrostatic charges.
Electroacoustic. Concerned with transduction of energy between electrical and acoustical forms.
Electrocheniical. Chemical action employing a current of electricity to cause or sustain the action.
Electrode. (Elee.) A pole of a battery or magnet, either positive or nega-. tive. (Weld.) The part or parts of a resistance welding machine through which the welding current and pressure are applied directly to the work.
Electroforming. (Plast.) Process of forming a mold cavity by electro­plating with iron, a master hob of metal, wood, glass, or plaster.
Electrolier. (Elee.) An electric fix­ture designed to hang from a ceil­ing.
Electrodynamic. Concerned with the interaction of electrical and dy­namic . mechanical processes. Commonly refers to moving-coil principle in loud-speakers.
Electrolysis. (Elite. and Engin.) De­composition of a material by pass­

'.~,