An International Correspondence Schools instruction text on carding wool, worsted and synthetic fibers, written by John K. Stearns with Alfred S. Govin. It covers the automatic feed, the breaker card and metallic breast, the Peralta machine, Apperly and Scotch intermediate feeds, card drive and setting, finisher cards, ring and tape condensers, and production calculations for woolen cards. A final section deals with worsted and synthetic cards, balling heads, sliver calculations, cardroom management and static electricity. The text includes many photographs and line drawings of card components, worked formula examples, practice problems with answers, and examination questions.