twyer (twier)

[Also tuyere, tweer, tuyer, and twier; accom. forms of F. tuyère, a nozle; cf. tuyau, a pipe: see tewel, tuel.] A tube or pipe through which the blast of air enters a blast-furnace. In blast-furnaces working with cold air this pa es direct from the blowing-engine into the "blast main" or "horseshoe-main" (a circular pipe nearly surrounding the hearth on the outside), and thence through the twyers into the furnace. When the hot blast is used precautions have to be taken to prevent the twyers from melting, and this is done by making them hollow truncated cones through which a supply of water is constantly circulating. In the so-called "Scotch twyer," which is also much used, instead of a truncated cone there is a spiral wrought-iron tube inclosed in a cast-iron casing, through phor-bronze have also been used for twyers. Also called tue-iron. See cut under smelting - furnace. - Twyer arch. See arch1. water is continually flowing. Copper and phos 3. An English copper coin of the reign of George III., of the value of two pence, i ued in 1797. Twopence or twopenny-gra . Same as twynt, twynnet, v. Variants of twin2. herb -twopence. twopenny (tö'pen'i or tup'en-i), a. and n. [ II. n. A kind of beer or ale, so called because originally sold at twopence a quart. This sort of liquor [pale ale] was principally consumed by the gentry; the victualler sold it at 4d. the quart, under the name of twopenny . S. Dowell , Taxes in England, IV. 122.