Patenting to Percentage

Patenting to Pebble dash

Patenting. Alloys with iron base are heated above the critical tempera­ture range and then are cooled to below that range in air or in molten lead which has a tempera­ture of about 700 degrees Fahren­heit.

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Patera. (Arch., Furn., Plaster.) A cir­cular ornament often worked in relief on friezes.

Path line. (Print.) The line which connects the proof mark with the error in correcting proofs.

Patina. (Furn.) The dark colour and rich appearance of the wood in furniture, caused by age.

Pattern. (Fdry.) A model or speci­men; something made for copy­ing, or for reproducing similar articles. The model from which metal castings are reproduced.

Pattern letter. (Fdry.) A letter made of cast lead, tin, or brass and at­tached to a pattern in order that .the name or number of the part may be reproduced on the cast­ing.

Pattera-makers saw. (Woodwk.) A small saw with a very thin blade; designed for accurate work in patternmaking and cabinetmaking. .

Pattern-making. The making of a model or plan for foundary projects. .

Patter shop. (Patrnkg.) The shop where wooden patterns are made which are used in the production of castings.

Pavement. (Masonry) A hard-surface covering for road or sidewalk.

Pavilion. (Arch.) Usually a roofed structure not entirely enclosed by walls, used as a gathering place or place of amusement.

Pay load. (Aero.) That part of the useful load from which revenue is derived, viz., passengers and freight.

Paynes process. (Wood) A method of fireproofing wood by injecting sulphate of iron followed by the injection of a solution of sulphate of lime or soda.

Peak load. (Elec.) The heaviest load which a generator or system is. called on to supply at regular intervals, as once every twenty­four hours.

Pearl. (Chern.) A gem composed of calcium carbonate, formed in the pearl oyster. (Print.) A 5-point type.

Pearling. (Furn.) The carving of a series of small circles or ovals.

Pearlite. (Metal.' The eutectoid al­loy of carbon and iron, contain­ing 0.9 per cent carbon, which is the iron carbon alloy of lowest transformation point in the solid.

Pearwood. A light-brown, close­ grained, medium-hard wood ex- . tensively used for draftsmens T squares, triangles, etc.

Peat. (Chern.) Partially carbonized vegetable material used as fuel. It has a very heavy water. content when dug from the bogs, and must \\e pressed and dried before it will burn freely.

Pebble dash. (Bldg.) A finish for ex­terior walls made by dashing

Pebbles to Percentage pebbles against the plaster or cement coating. ­

Pebbles. (Paint and Lacquer) A rough, uneven wavy effect in a spray coat of paint~ etc., can be charged to insufficinet atomiza­tion or too low air pressure.

Pebbling. (Print.) The process of graining or imparting a surface of irregular roughness to paper to improve its attractiveness and to reduce the shiny effect.

Peck. (Wood) Channeled or pitted areas of localized decay (found in cedar and cypress).
Pedestal. A base of or for a column, statue, or other object.
Pedestal table. (Furn.) A table sup­ported by a column or pedestal.

Pediment. (Arch.) A traingular mem­ber framed in a by cornice and surmounting a portico; usually of low altitude as compared with the width of its base.

Pedometer. An instrument for record­ing distance walked.

Peen. (Mech.) The small end of the head of a hammer, as the ball­ peen hammer for metalworkers.

Peening. (Metalwk.) Beating over or smoothing over a metallic sur­face with the peen end of a ham­mer.

Peen ramming. (Fdry.) Ramming done with the wedge or peen end of the rammer. Peg. (Furn.) A wooden pin, or spike, used for fastening together the parts of furniture in lieu of nails.

Pellucid. Perfectly clear; transparent. Pendant. (Furn., Plaster.) A hanging ornament.

Pendant switch. (Elec.) A small push-button switch attached to a drop cord 'hanging from the ceil~ iog; used for operating a ceiling light.

Pendulum. An object suspended­from a fixed point, being free to swing to and fro, as the pendu­lum of a clock.

Penetrating. (Wood Fin.) Having power to penetrate or permeate. In wood finishing, a penetrating stain is one- that forces its way below the surface into the fibers of the wood.

Penetrating oiI. A special oil used as an"aid in loosening parts that have become rusted or corroded.

Penetrometer. (Plast.) Instrument for measuring ease of penetration of surfaces of solid bodies.

Penny. (Carp.) A suffix used with a numeral to indicate length of nails; a tenpenny nail is 3 inches long. Originally the word with the numeral indicated price per hundred. Penny-weight. (troy weight) 1120 troy ounce.

Pentagon. (Math.) A five-sided plane figure.

Pent roof. (Arch.) A roof with a slope on one side only.

Penumbra. A sort of secondary shadow. That area between com­plete shadow and the- unshaded area.

Percentage. (Math. and Mech.) Pro­ portion in a hundred parts. Rate per hundred. A part considered in

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