A dictionary entry on the cotton-cleaner, a machine that removes dust and dirt from raw cotton by scutching and blowing before carding. It describes in detail the operation of Pilson's cotton-cleaner (Fig. 1484), with its feed rollers, toothed scutchers, wire cylinders, gratings and exhaust fan. It also briefly describes Lord's cotton-cleaner (Fig. 1435), which has a feed-apron speed regulated by the thickness of the cotton layer.