Specimens of colored glass, pressed in beautiful forms for brooches, rings, beads, and similar ornaments, are numerous. Of those of Roman production many specimens have been found in England. Some of these were taken from the Roman barrows. In Wales glass rings have been found; they were vulgarly called "snake stones," from the popular notion that they were produced by snakes, but were in fact rings used by the Druids as a charm with which to impose upon the superstitious. We find, too, that the specific gravity of the specimens referred to ranges from 2034 to 3400, proving oxide of lead to have been used in their manufacture; the mean gravity of modern flint-glass being 3200. From what we gather from the foregoing facts, we are inclined to the belief that, in fine fancy work, in colors, and in the imitation of gems, the ancient glass-makers excelled the modern ones. They were also acquainted with the art of making and using moulds for blown and pressed glass, and forming what in England is now called patent pillar glass. All these operations, however, were evidently on a very limited scale, their views being mainly directed to the production of small but costly articles. Although in the time of the Roman manufacturers vases of extra size were made, requiring larger crucibles and furnaces than those used by the glass-makers of Tyre, yet it is evident that they produced few articles except such as were held sacred for sepulchral purposes, or designed for luxury. And while they possessed the knowledge of the use of moulds to press and blow glass by expansion, it does not appear that they produced any articles for domestic use. If it were not thus, some evidences would be found among the various specimens which have been preserved. LEGENDS OF THE GLASS-HOUSE, ETC. Enough has been adduced to show the peculiar estimation in which the art of glass-making was formerly held, and the privileges conferred on it by the various governments of Europe. The art was thus almost invested with an air of romance; and a manufacture commanding so much attention on the part of the governments was regarded with a great share of awe and wonder.