GLASS.
Pliny informs us, the art of making glass was accidentally discovered by some merchants who were travelling 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. It is certain that we are more indebted to chance than genius for many of the most valuable discoveries.