Anvil vise
tion of the vibration due to the blow. It is often embedded in masonry or concrete.
Anvil vise. (Forg.) A vise having an
anvil on the stationary jaw.
Apertrue. An opening, orifice, or hole.
(ELec.) An opening through which
an electronic beam can pass.
Apex. (Math.) The top or peak of a
cone, pyramid, or conical figure
generally.
Apogee. (Aerosp.) The point at which
an orbiting satellite is farthest from
the earth.
Apparent E.M.F. (ELec.) Voltage as indicated by the pressure drop caused by current passing through resistance.
Apparent power. (ELec.) In an inductive a.c. circuit, the product of the amperes x volts (kVA) as distinguished from the true power as shown by a wattmeter.
Apparent watts. (ELec.) Volts times
amperes in an a.c.-current circuit:
Appendage. Something appended to
or accompanying a principal or
greater thing, but not necessary to it.
Appendix. (Print.) An addition or supplement to the subject matter of a book, usually following the last chapter.
Appliances. (ELec.) A general term used in speaking of household electric laboursaving devices, such as toasters, mixers, sweepers, etc.
Application. The act of applying; putting into practice; the practical demonstration of a principle.
Applied design. (Fine Arts.) Design
used to beautify or make useful objects more attractive.
Applied mechanics. (phys.) Treats
of the laws of mechanics as applied
to construction in the useful arts.
Applied molding. (Furn.) Molding
placed to give the effect of paneling; Jacobean ornament of the seventeenth century.
Apprentice. A learner in a trade. Usually one, who, by contract or indenture, is taught the rudiments of the trade during the term of the agreement.
Apprenticeship. That period of time agreed upon between employer and employee, during which the employer promises to teach the employee the rudiments of his trade.
Approach light. (Aero.) A light, usually green, designed to indicate a favourable direction of approach for landing an aircraft.
Approximately. (Mech.) Nearly; frequently used when speaking of the capabilities of machines, their measurements, and near shipping weights.
Apron. (Aero.) A hard-surface area of considerable extent immediately in front of the entrance of a hangar or aircraft shelter which is used for the handling of aircraft or for repair in clear weather. (Arch.) A plain or molded piece of finish below the stool of a window, put on to cover the rough edge of the plastering. (Furn.) That board immediately under the top of a table, which fasten~ the legs together, gives support to the top, and improves the appearance of the table;
Arch: the width of the board or strip is used vertically. (Mech.) The vertical plate in the front part of the carriage of a screw-cutting lathe to which the split nut is attached.
Apse. (Arch.) The altar end of a church; a recess.
Aqua ammonia. (Chern.) Solution NHpH. Ammonium hydroxide commonly called ammonia water. Used as a household cleanser.
Aqua dag. (Chern.) A colloidal suspension of graphite in water. .
Aqua fortis. (Chern.) NH03. Nitric acid.
Aquamarin. (Color) A pale blue to light greenish blue.
Aqueduct. A water conduit of channels, steel pipes, syphons, or tunnels, etc., through which a community is supplied.
Aqueous. Watery.
Arabesque. (Arch.) An ornament,painted, inlaid, or carved in low relief, the pattern consisting of plants, fruits, and figures of men and animals interlaced in fantastic devices. (Furn.) An ornament, painted, inlaid, or carved in the Arabian manner.
Arabic numbers. The commonly used numerals,. I, 2, 3,4,5,6,7,8,9, 0, as distinguished from the Roman I, II, III, IV, etc.
Arbor. (Arch.) Detached lattice-work; a bower; a nook. (Mech.) A short shaft or spindle on which an object may be carried while being machined. (SEE MANDREL.) On a milling machine, an arbor may have a tapered shank with a straight body for carrying rotary cutters.
Arbor press. (Mach.) A device for pressing an arbor, or shaft, into the bore, or hole, of an article to be turned on a lathe and for removing same when work in finished.
Arc. (Elec.) Any flashing occurring between the terminals of an electric circuit when the circuit has been interrupted. (Math.) Any portion of the circumference of a circle.
Area. (Furn.) A chest for storing treasures.
Arcade. (Arch.) A range of arches supported either on columns or on piers, and attached to or detach~d from the wall. An arched j)assageway.
Arc brazing. An electric brazing pro-cess wherein the heat is obtained from an electric arc formed bet-ween the base metal and an elec-trode, or between two electrodes.
Arc cutting. A group of cutting processes wherein the severing of metals is effected by melting with the heat of an arc between an electrode and the base metal.
Arc furnace. (Elec.) A furnace in which the heat is generated by an electric arc.
Arch. (Arch.) A curved or pointed
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