=Mash=--(_Vide_ Index).--Otherwise smash, or trap. =Mitre Wheels=--Bevel wheels which gear with and are exactly similar to each other. =Open-band Yarn=--Yarn spun weft-way--that is, twisted over to the right. =P.C.=--Pin cop--_i.e._, weft size of cop. =Pick=--The insertion of a thread of weft; the propulsion of the shuttle through the shed; the time occupied in the opening of the shed, the picking, and beating up.--A term used to signify the number of picks in a quarter-inch. =Pirn=--A wooden tube on which is wound the weft used for headings, etc. =Ply=--A thickness or layer of fabric--thus, two-ply, three-ply, refer to double or triple cloth. =Positive Motion=--A motion driven by gearing as distinct from one driven by friction or some non-positive force. =Pure Size=--Sizing with vegetable or animal substances, used for light percentages. =Range=--A series of cloths similar in style, but varying in width or other dimensions. =Reed=--(_Vide_ Chapter III.).--Also the number of ends per quarter-inch. =Run=--A stripe of colour in a fabric. =Scobs=--_Sc. for_ slattering. =Selvage=--The sides of a fabric. =Sett=--The fineness of reeds--reed counts. Also signifying the amount of warp on the beams which are sized at one time. =Shaft=--A heald. =Shed=--The opening made in the warp for the passage of the shuttle; also, a weaving mill. =Shot=--_Sc. for_ pick. =Slay=--Otherwise _lay_ or _lathe_ (_vide_ Index). =Smash=--Synonymous with mash or trap (_vide_ Index). =Split=--Dent. =S.S.=--Abbreviation of “short stick.” =Stave=--Equivalent to shaft. =Strip=--A narrow bar of heading. =Stud=--A short projecting pin to carry a wheel or wheels. =Tapes=--Borders of cramped or coarse warp. =Tappet=--(_See_ Index).--_Sc. for_ wiper. =Technical=--Specially appertaining to an industrial art, business, or profession. =Technology=--The branch of knowledge dealing with the systematic study of the industrial arts. =Terry=--Uncut or loop pile. =Trap=--Synonymous with mash. =Trevette=--A knife used in cutting the pile wires out of the cloth. =Tuning=--Tackling. =Turns (per inch)=--The extent of the torsion in yarn. =T.W.=--Twist-way yarn or thread, which, in being spun, has been twisted over to the left--distinct from weft-way. =Tweel=--_Sc. for_ twill. =Twist=--Warp yarn. =Up-taking=--_Sc. for_ the take-up motion. =Warp=--The yarn arranged length-way of the cloth--the full beam of warp yarn. =Water T.=--Throstle twist. =Waves=--Zigzag twill pattern. =Wax=--Cotton wax is a substance coating the outside of cotton fibres, and present to the extent of about 1/2 per cent. It is a brownish horny vegetable wax. =Weft=--The yarn arranged across the cloth.