Mosaic
a term applied to any work which exhibits a representation on a plane surface by the joining together of minute pieces of hard, colored substances, such as marble, glass, or natural stances, such as marble, glass, or natural serving as floors, walls, and the ornastones united by cement (mastic), and work is of Asiatic origin, and is probamental coverings of columns. 519 B. C. It had attained to great excel- Mosaic 519 в. c. It had attained to great excellence in Greece, in the time of Alexander and his successors. The Opus tesselatum tury A. D. The art was revived in Italy Byzantine mosaics date from the 4th cen- Byzantine mosaics date from the 4th cendesigned mosaics, and introduced designed mosaics, and introduced a Tafi, Gaddi, Cimabue, and Giotto, who a 16th century Titian and Veronese also designed subjects for this art. The prachigher style in the 13th century. In the into vogue in the 17th century; and tice of copying paintings in mosaics came Modern Roman mosaic consists of pieces there is now a workshop in the Vatican. stone. Italy at present leads in this art, and St. Peter's in Rome is remarkably stone. Italy at present leads in this art, of artificial enamel, in place of natural rich in specimens of such work. ments, formed by two series of parallel In pyrotechnics, a device consisting of lines crossing each other. The effect is a surface with diamond-shaped compartlines crossing each other. The effect is four jets of fire which run into the ad- produced by placing at each intersection joining ones. name given by Conybeare to a gigantic