An encyclopedia article defining the loom and explaining its construction and operation, with emphasis on the plain power-loom and its three basic movements: shedding, picking and beating up. It also covers the hand-loom, fancy (dobby-type) loom with pattern chain, box-motion, Jacquard machine, draw-loom, loom harness and reed. Brief historical notes cover Cartwright's power-loom, Jacquard and his predecessors, and the draw-boy. Three figures show a hand-loom, a power-loom end view and a Jacquard mechanism.