Other technical points, not necessarily in themselves signs of merit, have to be taken into account in problems of classification and identification. The chief of these are:—the species of knot ; the material (wool, cotton, silk, etc.) and nature of the yarns constituting warp, weft and pile; the colour of the warp, and whether it is arranged on one or two levels ; the colour of the weft, and the number of times it passes after each row of knots ; the length of the pile ; the way in which the sides and ends are finished. These points, duly observed, will throw as much light upon the carpet as do the design and colour.
Very often there is a prominent central panel or medallion, which is sometimes associated with four quarter-panels, one in each corner of the field : or there may be a number of panels, perhaps of two different shapes, arranged on a symmetrical plan. Again, a succession of similar panels is often found set on the long axis of the carpet : or the whole field may be divided up into well marked rectangular or lozenge-shaped compartments. Lastly may be mentioned the arched form cut off from the ends of the field, or from one end only as in most prayer-rugs.
Motives with symbolic meaning are undoubtedly often seen in carpet design, but it is very questionable (in spite of much that is alleged) whether in most cases the designer or weaver has adopted them with full con sciousness of their significance.
In this connection it must be re membered that the vast majority of oriental carpets have been copied with only slight modi fications from others previously made.
Little need be said about the ornament in detail. Flowers such as the rose, jasmin, hya cinth, or trees as the cypress or willow can often be identified but many of the floral forms are too indefinite for recognition. The inflorescence of the date palm —such an important object to the oriental—is rendered in many characteristic ways to which the term palmette is frequently ap plied. The well-known comma-shaped device common in the later Persian carpets may also be derived from the date-palm. It is most often called the cone-device, but many other names and origins are ascribed to it. The cloud-band, borrowed from Chinese art, is a ribbon or snake-like conventionalization of a cloud. Perhaps it is the origin of the S-form found in many of the more geometrical carpets. Latch-hooks are the angular ap pendages set round the edge of a panel to soften a too rigid contour. Apart from isolated motives there are several well known all-over patterns, of which the herati and the mina khani are the most common (see figs. 7 and 8). With regard to border patterns it will soon be noticed that there are many almost stand ardized types, some of which are peculiar to particular groups of rugs. The basic idea is mostly either that of a wavy stem bearing flowers and leaves or else a succession of similar devices, floral or geometrical, set in a row.
This association of great richness of colour with great depth of tone is undoubtedly due in great part to the effect of the pile surface, and in consequence it is not possible to get on paper a reproduction of a carpet that will give more than an indication of the beauty of the original.