The purpose of the stuffer, or dead warp, is merely to give body or weight to the fabric, and it is not essential if there is enough body provided by the rest of the warp. The stuffer ends are also carried on eyelets in a gear frame, but are not divided like the chain, and remain practically in the middle of the fabric. Both chain and stuffer beams lie between the creel frames and the main part of the loom. Their slow unwinding is operated automatically while the loom is running. The harness consists of a set of 1,300 cords, carrying the mails or eyelets through which the worsted is threaded, kept taut by a weight at their lower ends, and connected with the Jacquard mechanism above. The Jacquard (the invention of Joseph Marie Jacquard, of Lyons) is an ingenious device for selecting and raising the threads required to form the pattern. The Jacquard principle in various forms is in use throughout the textile trades, and need not be described in detail here. The essential feature of it is the combination of perforated paper or card with needles or pegs in such a way that the blank (or, it may be, the perforation) in the card causes the harness carrying a certain thread, or set of threads, to rise as required. The operation of the Brussels loom may now be described. The ends of worsted yarn from the creel bobbins having been drawn through the eyes in the harness, and the chain and stuffer ends through the eyes in the healds, all are drawn through the sley in such a way that there will be in each reed-space five ends of worsted, two of cotton chain, and one of stuffer warp. All ends are now made fast to the breast roller at the front of the loom, and kept taut by weighting the warp beams, and by hanging small hooked weights on to each thread of worsted close to the bobbin in the creel frame. [Illustration: FIG. 2 LONGITUDINAL SECTION THROUGH HEALDS, HARNESS, SLEY, AND FABRIC A, Stuffer warp; B, Worsted warps; C, Chain; J, Comberboard; K, Mail; L, Lingo; H, Healds; 1 to 6, Harness]