Aniline to Anvil block.

Aniline to Antenna

preparations and regfrigeration.
Aniline. (Chern.) A colourless, oily compound (C6HsNH2), the base from which many of the coal-tar dyes are made; also used in the rubber indus­try.
Animalized cotton. (Textile) Cotton coated with protein material to give it the nature of animal fibers toward silk or wool dyes.
Anion. (Elec.) The nonmetallic radi­cal which appears at the anode, or positive electrode, in an electrolytic cell.
Anneal. (Metal.) To heat to a critical temperature and cool sl~wly in order to soften metal, reduce brittleness, and make it more workable.
Annealed tubing. (Metal.) Metal tub­ing is commercially supplied hard, partically annealed, and fully an­nealed. When bending is required, full-annealed tubing should be used.
Annealing. (Metal.) The gradual heat­ing and the gradual cooling of glass, metals, or other materials to reduce brittleness and increase flexibility, etc.
Annual ring. (Lumber) The circum­ferential layer of wood seen in a cross section of timber, which represents the yearly growth.
AnnUlar ball bearing. (Mach.) A bear­ing in which the balls are contained in a ringlike holder.
Annular vault. (Arch.) A vault rising from two parallel walls; same as bar­rel vault.
Annular wheel. (Gear.) A ring gear with the teeth fixed to its internal circu­mference; called also an internal gear.

Annulated columns. (Arch.) A small square molding used to separate others.
Annulet. (Arch.) A s~all square
molding used to separate otl.ers.
Annunciator. (Elec.) A dev'ice for indicating, by visual and auditory means, a closed circuit or an acti­vity which closes a circuit at a predetermined station or place.
Annunciator wire. (Elec.) Soft cop­per wire wound with two layers of cotton thread in opposi~e direc­tions and coated with paraffin.
Anode. (Elec.) Opposite of cathode The point where, or path by which a voltaic current enters an electfo­Iyte; the positive voltaic pole or the plate constituting it.
Anodizing. (Metal.) The forming of a hard surface film of aluminium oxide on aluminium parts by an electric process in a chromic-acid solution. This film acts as a pro­tective coating and serves as a good paint base.
Anta. (Arch.) A pilaster opposite an­ other, as on a door jamb.
AnterlX. (Arch.) An upright ornament fixed to the corners of bed cornices.
Antenna. (Roo., Tel.) The common aerial, either indoor or outdoor, for receiving or sending out "radio" waves.
Antenna DirectionaLity to Anvil block
Antenna DirectionaLity. The charac­teristic of certain antenna configu­rations, including most FM and TV antennas, to receive wave reaching it within certain defined angles more strongly than those coming from other directions.
Antenna Gain. An indirect measure for an antenna's output level, Le., the strength of the signal supplied by the antenna when compar~ to standard antenna and at a certain frequency. Expressed in decibels (dB).
Anthemion. (Arch. and Art.) The palm-leaf pattern as used by the Greeks in ornamental design.
Anthracene. (Chem.) Obtained by the distillation of coal tar; used in the manufacture of dyestuffs.
Anthracite. (Min.) A medium hard, glossy mineral substance, com­monly known as hard coal.
Antibiotic. (Chem.) A mold or fungus, which kills, retards, or completely represses the growth of other organisms, usually without hanning higher orders of life. This substance can be synthesized chemically or produced by a microorganism.
Antidrag wire. (Aero.) A wire de­signed primarily to resist forces acting parallel to the chord of the
. wing of an airplane and in the same direction as the direction of flight. It is generally enclosed in the wing.
Antifreeze mixture. (Auto Mech.) Alcohol, glycerin, or any of the chemical preparations mixed with the water of the cooling system to prevent freezing.
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Antifriction metal. Babbitt's metal or white metal, used for lining the steps and bearings of shafts and axles, and similar: moving parts; inexpensive and efficient.
Antiknock. (Chern.) A substance which produces unifonn expansion of the combustion mixture.
Antilogarithm. (Math.) The number
corresponding to a given logarithm.
Antimonial lead. (Metal.) An alloy of from 4 to 10 per cent antimony with 90 to 96 per cent lead. Used for storage-battery plates.
Antimony. (Min. and Chem.) A silver-whi!C, hard, crystalline metallic element related to arsenic and tin. Used in alloy of tin and lead to give hardness (Sb.)
Antinode. (Phys.) Midway point, maximum amplitude, of a vibrat­ing body between two nodes.
Antique. (Papermkg.)A bulky paper of low finish similar to "eggshell." (Print.) A moderately bold type.
face both roman and italic, in which all lines are of nearly the same thickness as shown in the words Roman and italic.
Antisiphon. (Plumb.) A type of water seal trap in which the outlet leg is increased in diameter to contain a sufficient volume of liquid to pre­vent a siphoning action which would br~ak the seal. .
Anvil. (Forg.) A steel or iron block upon which forging is done.
Anvil block. (Forg.)A massive block of cast iron which is placed be­neath the anvils of steam and other heavy hammers, for the absorp­