Discovery of Glass.
Pliny informs us that the art of making glass was accidentally discovered by some merchants who were traveling with nitre, and stopped near a river issuing from Mount Carmel. Not readily finding stones to rest their kettles on, they employed some pieces of their nitre for that purpose. The nitre, gradually dissolving by the heat of the fire, mixed with the sand, and a transparent matter flowed, which was, in fact, glass.