An International Correspondence Schools instruction paper on the Northrop automatic loom, in two parts. Part 1 covers construction and operation: the hopper or magazine, transferring mechanism, shuttle feeler, shuttles and bobbins, temple thread cutter, filling motion, and the feeler filling-changing device. Part 2 covers warp stop-motions (cotton-harness and steel-harness), take-up let-back, cut motion, and the Draper-Roper let-off motion. It then gives loom-fixing instructions for adjusting and timing these mechanisms, a table of recommended speeds by cloth width, loom arrangement, and the range of application of the Northrop loom. Illustrated with line drawings of mechanisms.