s cups of glass which reflected like a pigeon's neck a variety of colors.
Flexible glass is referred to by Pliny, Petronius, Dion Cassius, and others who copied from them.
The two former refer to vases made in the time of Tiberius.
It is not fully credited.
Julius Caesar found the Britons in possession of glass beads, which they probably obtained of the Phoenicians in return for tin. Rome had few glass windows till the reign of Nero.
Some are found in the ruins of Pompeii, buried 79 B. C.
Pliny describes the mode of making glass, and states that Sidon was formerly famous for its glasshouses, and that its people first invented mirrors.
In this day, says he (A. D. 79), throughout the Spanish and Gallic provinces, glass is made of white sand and niter by a double fusion.
He also speaks of flexible glass, stating that he hardly believed the story, which was a wonderful thing after telling such a farrago of stuff about medicines and magic.
In his day—he says—glass had quite