A short dictionary entry from Knight's American Mechanical Dictionary describing machines for cleansing fleece wool in the factory. It outlines three patented designs: McNaught's (1869), Clark's (1865) and Murkland's, explaining how rakes, cradles, aprons, stampers, rollers and toothed cylinders move and wash the wool. A side-elevation engraving (Fig. 7355) illustrates one machine.