Delta connection to Design.

Delta connection. (Elec.) The con­nection of the circuits in a three­phase system in which the tenninal connections are triangular like the Greek letter delta.
Delta metal. (Metal. ) An alloy of cop­per and zinc with a small amount of iron. .
Deluxe. (Bookbndg.) A particularly fine or elaborate edition of a book.
Demagnetization. (Elec.) The process of removing magnetism from a magnetized substance.
Demand factor. (Elec.) The ratio of the maximum demand of an elec­tric supply system or part of a sys­tem to the totaf connected load of the system or of that part of the system being considered.
Demarcation line. (Masonry) A limit or line fixed as a boundary.
Demo. A demo is a live perfonnance with usually one instrument, played to give others in the room a rough idea of what you wish a piece. of music to be delivered like. A demo recording is the commitment of the above perfonnance to tape.
Demodulation. The process of "ex­tracting" from a modulated high or intennedlate frequency wave the original audio signal with which it was modulated.
Demodulator. In an FM stereo tuner, the circuit that extracts the left and right channel signals from a broad­cast signal originally modulated by the FM multiplex system. In a dis­crete 4-channel system, a. demodulator is that unit which drives four signals from a CD-4 record.
Demountable rim. (Auto.) A type of rim that can be removed from the wheel without deflating the tire.
Demurrage. The detention of a ves­sel, railroad car, or other vehicle beyond an allotted time; usually by failure to unload same within a specified number of hours or days.
Denaturants. (Chem.) The various substances such as pyridine, ben­zene, .kerosene, etc., added to alcohol to prevent its use as a beverage.
Denatured alcohol. (Chem. and Wood Patmkg.) Alcohol changed by the addition of pyridine, methyl alcohol, or other denaturants so as to make it unpalatable; used freely in the industries, in manufaturing, as an antifreeze solution, and in the cutting of shellac.
Denim. (Textile) A strong, twilled, cotton fabric of good wearing qualities, although most denims fade badly on too much exposure to bright sun light. It is much used for upholstering furniture.
Denomination. A class or division.
Density. Compactness. The mass or quantity of matter of a substance
per unit of its volume, propor­tional to its specific gravity since mass is proportional to weight.
Derisity altitude. (Aero.) The alti­

Dentil. (Arch.) A rectangular decora- . tive block such as that commonly' used in the bed mold of a Corinthian entablature.
Depolarization. (Elec.) The process of preserving the activity of a vol­taic cell by preventing polarization.
Depolarizer. (Elec.)An oxidizing sub­,>tance used for fixing the hydrogen derived from the decomposition of the acid by the zinc in primary cells.
Deposit. (Auto.) (I) The product of combustion which forms on finished surfaces. (2) Solid matter which accumulates on a metal surface, as by any of the various plating processes. Also the accumulation of scale in a boiler, etc.
Deposition. The act of depositing or precipitating a coating upon a sur­face.
Depreciation. The loss in value which machinery sustains through age and through wear and tear. .
Depth gauge. (Mech.) A gauge used by wood- and metal-workers for testing the depth of holes and re­cessed portions.
Depth micrometer. (Mach.) A preci­sion gauge with micrometer adjust­ment, used to determine the depth of holes, slots, counterbores, or the distance from one surface to a lower

Depth of field. The distance between the first object in focus and the last object in focus within a scene as vie'Wed by a particular lens; can vary with the quality and mm of the lens or with its f/stop setting.
Depth of focus. The allowable lati­tude of lens image plane to vidicon target area which ensures that a given picture remains in focus. Depth of focus is adjusted by moving tne vidicon closer to or farther' away from the end of the lens, not normally. used in video as a focusing adjustment.
Depth perception. A subjective evaluation of the distance between objects viewed with regard to their size and the planes which they de­scribe.
Derrick. (Shopwk.) A structure con­sisting of a fixed upright and an arm hinged at the bottom, which is raised: and lowered, and usually swings around to handle heavy loads.
Derived rear channels. Signals for feeding a pair of rear loudspeakers to provide quasiquadraphony (by a proeess of phase/amplitude/time manipulation) in an otherwise con­ventional stereo system.
Descender. (Print.) That part of a lower-case letter which extends below the body of the leiter, such as p, y, j, etc.
Describe. To draw; to trace out; to narrate; to set forth.
Description. An account of anything in words or writing.
Desiccate. To exhaust or remove the moisture from; to dry thoroughly; to become dry.
Design. (Arch. alld Art) To plan, origi­nate, or show by drawings, some ligure or object which can be built