As a general rule, these warp-threads are of the same color as the weft-threads; hence, every filling pick, appearing either on face or back, is bound by a warp-thread of the same color. The sectional cut represents four distinct effects with 32 picks, thus allowing 8 picks for the illustration of each part.
1st effect, picks 1 to 8, is ground up (white and olive).
2d effect, picks 9 to 16, is figure up (red and black).
3d effect, picks 17 to 24, is 1st effect in "shot about" (red and olive up).
4th effect, picks 25 to 32, is 2d effect in "shot about" (white and black up).
Two methods of tying-up Jacquard harness are in use:
1st, the “straight-through” principle, (known to the trade as “cross-point”).
2d, the “point” method, (known to the trade as “centre-tie”).
I. The Straight-Through Tie-up for Ingrain Carpets.
Fig. CVIII.
[Fig. CVIII.], p. 73, represents the arrangement of the neck-cords with the heddles (through the harness-cords). There are two separate bottom boards in the machine, marked A, B, for ground and figure; also two corresponding lifter-boards, which are illustrated separately by [Fig. CIX.]