An International Correspondence Schools instruction paper on beam warpers used in preparing cotton warps after spooling. It describes the parts of the Entwistle and Draper warpers: creels, expansion combs, drop and rise rolls, stop-motions, measuring motions, slow-motion gearing, cone drive and beam doffer. It closes with speed calculations, management of warping rooms, production estimates and a table of pounds warped in 60 hours by yarn number and number of ends.