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Apron

(1) A flat plate at the end of the trough delivering water to a waterwheel. (2) Arc or breast of stone or wood fitted behind a breast or pitchback waterwheel to contain the water in the buckets. (3) The brick or wooden boarded floor to a watercourse, upstream or downstream from a sluice or waterwheel to prevent the water from scouring under the foundations. (4) The area around the bedstone, into which the mill eye is set. (5) A sheet of oiled cloth, leather or rubber which bridges the gap between the breast box and the moving wire on a FOURDRINIER paper machine so that the PULP is delivered evenly onto the wire.