Page:Pyrotechnics the history and art of firework making (1922).djvu/198

 Another firework which is probably a development of the Roman candle is the jewel fountain. This consists of a fountain mixture of saltpetre, sulphur, and charcoal, to which is added granules of star composition, which are thrown out by the force of the fire, giving a fountain effect in which appear variously coloured points of fire.