FLOCCULATION

the proce by which extremely fine particles of mineral matter, ., aggregate into large lumps. The tendency of material of the nature of mud (that is, materials in which the particles average le than one-hundredth of a millimetre in diameter) to flocculate is of considerable importance in flotation methods of concentrating minerals, 478 FLOCKS FLOCKS, originally a term given to the accumulated fibres which become detached from woollen fabrics during the milling proce , and which during the continued operation are rolled into irregularly shaped small groups. When the operation of fulling or milling is completed, the soap solution and the flocks are caused to enter a rectangular ve el with a perforated bottom, so that the flocks may be arrested while the soap solution pa es through. The flocks are then removed from th ve el and dried, while the solution is collected and the oil and other substances separated. Flocks are used extensively as a substitute for hair in upholstery.