white transparent glass, as described in the manipulatory portion of the work. (See page 110.)

Figs. 3, 4, and 5. Ancient Glass, in the possession of Mr. Roach Smith. These varieties are produced by mixing small Glass bugles or beads with masses of fused green, purple, or azure-blue glass. They are curious and interesting, and in excellent preservation.

Fig. 6. Crude artificial sardonyx—from the British Museum—of three layers of opaque coloured Glass: this, it is supposed, was manufactured for the Grecian artists at Rome, for the purpose of cameo-engraving, or for cutting into other gems of high art, and so doubt afterwards suggested larger gems and vessels, such as the Portland and other vases; also the case described by Minutoli (the neck and handle of which are in the cabinet of Mr. Richardson Aldjo, and the remainder in the British Museum); likewise the Naples or Pompeii vase. (See Plate 1.)

Fig. 7. Fragment of Mosaic Glass, which, as well as fig. 6 in the British Museum, is a beautiful exemplification of the art of making pictures of Glass, with variously-coloured threads of Glass fused together, as described by Wincklemann and others; by means of which, elegant arabesque designs were executed by the ancients.

Fig. 8. Specimen of Chinese Glass, in the possession of the author. The constituent of the yellow colour is unknown. The Glass is supposed to be chiefly composed of feldspar; the heads are impressed by metal dies. The foot is of wood.