Plate 63. XVIII Century Chinese Rug
(c) That fields covered with designs of octagonal or diamond shape belong to rugs of the Central Asian group.
(d) That about two thirds of the Persian group have cotton warp; and the remaining third, as well as the Asia Minor and almost all the Caucasian and Central Asian group have woollen warp.
(e) That about one third of the Persian group have one of the two threads of warp encircled by a knot doubled under the other so as to be hidden at the back; and that this is not the case with the remaining two thirds nor with almost all classes of other groups.
(f) That, with few exceptions, the Persian rugs have a side finish of overcasting; and the other groups have both overcasting and selvage.
(g) That the rugs from Persia and Central Asia have both light and dark colours which, though rich, are subdued and harmonious; that the rugs of Asia Minor and Caucasia have colours that are often gaudy and inharmonious; and that the rugs of the Central Asian group have dark tones of red, blue, and brown.
(h) That all of the rugs of Asia Minor and Caucasia have the Ghiordes knot; that the rugs of Central Asia, with rare exceptions, have the Sehna knot; that the rugs of Persia with woollen warp have the Ghiordes knot; and that those with cotton warp have either the Ghiordes or the Sehna knot.
(i) That the few classes of rugs which have very long end-webs belong to the Central Asian group. Of the classes with moderately long end-webs, several belong to the Central Asian and the Asia Minor groups, only two belong to the Persian group, and none belongs to the Caucasian group.
Excluding the Indian and Chinese rugs, it follows from the above statements that: