A 1912 technical textbook on the preparation of wool for spinning, written by two Bradford Technical College instructors. It covers sheep breeds and breeding (including a chapter on Mendelism), wool and hair types from Britain and the colonies, wool classing and sorting, fibre properties, scouring, drying, and yarn types and twist. The final chapters describe the machinery for preparing, carding and combing, including gill boxes, carders, backwashers and circular combs, and a table of Bradford tops grades. It is illustrated with photographs of sheep, fibre micrographs, machine drawings, charts and tables.