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Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
d then spread on the grass to dry and get wet alternately; the showers, sun, and air completing the preparation of the fiber for the mechanical treatment, — the brake and the scutcher. This exposure to weather is termed grassing. The time occupied in retting is from six to twenty days, according to temperature. Dew retting is accomplished by exposing the flax stalks to the weather, without steeping, the sun, showers, and air rotting the woody portion and washing away the mucilage. Schenck's retting apparatus, 1851, consists of circular vats, in which the flax is placed, being kept down by a weight while it is swelled by water maintained at a heat of 90° by the introduction of steam Passing to the acetous fermentation, the mucilage is rendered perfectly soluble and is run off, the flax being then removed and dried. The process takes about sixty hours. The flax is exposed to the air upon frames or dried by steam heat. Bower's retting process (English) consists in alternate