The Jacquard Machine Analyzed and Explained / With an appendix on the preparation of jacquard cards, and practical hints to learners of jacquard designing

by E. A. Posselt

Fig. CIX.

The four journals are clearly illustrated by [Fig. CX.] (each journal carrying its own set of threads).

The first thread in the loom (left side) will be found on the first journal.
The second thread in the loom (left side) will be found on the third journal.
The third thread in the loom (left side) will be found on the second journal.
The fourth thread in the loom (left side) will be found on the fourth journal.

Fig. CX.

This arrangement of threads, 1, 3, 2, 4, is repeated throughout the fabric. For an example, a carpet is shown termed “extra fine,” executed on 26 “designs,” requiring 26 × 8, or 208 small squares for warp on the designing paper. Ingrain carpets are generally woven one yard wide, having in this width two repeats or divisions; hence the number of harness-cords for the present example is as follows: 26 × 8 = 208 × 2, for ground and figure; 416 × 2, for two divisions, = 832 harness-cords (or 416 leashes) required for tying-up.