Encyclopedia article on wool from the New International Encyclopedia. It covers world and US wool production and consumption around 1915, the history of sheep breeding, and the physical properties of the fibre (scales, curl, staple length, lustre, elasticity, strength, yolk or suint). It also explains how a fleece is sorted by body region, with a diagram of a Leicester lamb's fleece, and includes a table of 1915 US wool production by state. A closing section describes other animal fibres (mohair, cashmere, alpaca, camel hair) and gives a bibliography.