FUSTIC, YELLOW WOOD or OLD FUSTIC, is the wood of a large tree (Chlorophora tinctoria) of the mulberry fam ily (Moraceae) growing in the West Indies and tropical America. The best quality comes from Cuba and the poorer from Jamaica and Brazil. It is still employed in the form of extract for wool dyeing, mainly in conjunction with other dyewoods, for the pro duction of browns, olives and compound colours, and for deaden ing the shade of blacks. The mordant mainly in use is bichromate of potash, and the olive yellow thus obtained is fairly fast to light. In other respects, the dyeing properties of this wood closely resemble those of Quercitron Bark. It contains two colouring mat ters, Morin, C,5H10O7, and Maclurin, C,3Hl000, of which the former is the more important. The dye-stuff termed young fustic, or Zante fustic and Venetian sumach, is the wood of the smoke tree (Rhus Cotinus), a southern European and Asiatic shrub of the Cashew family (Anacardiaceae) . (A. G. P.)