IN Old China charms and amulets were usually made of various auspicious substances which, according to old folk beliefs, had inherent magical qualities that could protect the wearer, as well as medicinal powers that could serve him in emergencies. This was true not only in the case of the purely religious plaques and small portable images, but also of the more practical belt toggles (called chui-tzu) which served as protective amulets too, although this latter fact has not previously been recognized. Toggles for fastening personal possessions to the belt were a practical necessity in Old China. The national costume had no pockets, nor any provision for carrying things on the person except by attaching them to the belt or girdle. During the Ming and Manchu dynasties, covering the period from 1368 to 1911, and perhaps long before, men customarily secured to their cloth girdles such things as purses, pouches, knives, fan-cases, and later, spectacle-cases and smoking sets by means of a cord ending in a lump of wood, stone, or ivory. The latter object, which was the toggle, could be passed up under the belt or girdle, and by its bulk or counterweight held the cord in place, keeping it from slipping out. The nobles and officials of the Manchu Dynasty had leather belts with metal rings at the side, to which they could tie pendant objects; but even they, when dressed more informally, secured things to their cloth belts with toggles. Probably from the beginning of their use in China, the toggles not only had this practical function of fastening possessions to the belt, but for the peasants, the commoners in towns and villages, and even for the country gentry who wore them, they also served as lucky or protective amulets. This fact becomes very apparent when we study the materials that were used to make them. The belt toggles of the nobles and wealthier commoners were often of jade or other hard stones, or of various kinds of ivory, but the great majority of Chinese toggles were made of wood. Most of the examples in Occidental museums and private collections happen to be those in the richer substances, because the foreign tourists and collectors in China generally ignored the ordinary ones. However, a few discerning collectors like Miss C. F. Bieber of Santa Fe, New Mexico, felt an appreciation for the intrinsic qualities of the wooden ones as well. The Bieber Collection alone has over a hundred examples in various kinds of wood.' Considering the great variety of trees in China proper, and the numerous tropical woods that were regularly imported from the lands to the south, the Chinese carvers had a vast number of possible woods to work with. Therefore, at first, the identification of the woods that were used to make the toggles in the Bieber Collection seemed to present a formidable problem. Fortunately, we were saved from the