The art of pottery was at first limited to vessel-making. In the earlier stages of culture, vases were confined to simple use as receptacles, but as culture ripened they were advanced to ceremonial and religious offices and received devices and representations in color and in relief connected with the cult to which they were devoted. Among some tribes large burial vases were fashioned to contain or cover the dead. An infinite variety of objects, such as pipes, whistles, rattles, toys, beads, trowels, calendars, masks, and figurines, were made of pottery. Clays of varying degrees of purity were used, and sometimes these were tempered with powdered quartz, shell, or like materials. The vessels were frequently built by coiling. The surface was smoothed by the hands or the modeling implement or was polished with a stone or other smoothing tool. Much attention was given to surface embellishment. The finger nails and various pointed tools were used to scarify and indent, and elaborate figures and designs were incised. Stamps with systematically worked designs were sometimes applied to the soft clay. Cords and woven fabrics were also employed to give diversity to the surface. With the more advanced tribes, though these simple processes were still resorted to, engraving, modeling in relief and in the round, and painting in colors were employed. TEXTILE FABRICS. Textile fabrics include those products of art in which the elements of their construction are filamental and mainly combined by using their flexibility. The processes employed are called wattling, interlacing, plaiting, netting, weaving, sewing, and embroidery. The materials generally used by primitive people were pliable vegetal growths, such as twigs, leaves, roots, canes, rushes, and grasses, and the hair, quills, feathers, and tendons of animals. Unlike works in stone and clay, textile articles are seldom long preserved. Still, from historic accounts and a study of the many beautiful articles produced by existing Indian tribes, a fair knowledge of the range and general character of native fabrics may be obtained. In many cases buried articles of that character have been preserved by the impregnation of the engirding earths with preservative salts, and also some fabrics which had been wrapped about buried utensils, or ornaments of copper remained without serious decay. Charring has also been a means of preserving cloth, and much has been learned of the weaving done by ancient workers through impressions upon pottery which had been made by applying the texture while the clay was still soft. The weaving appliances were simple, but the results in plain and figured fabrics, in tapestry, in lace-like embroideries, and in feather-work are admirable.