Light from Sugar.
In a dark room, rub smartly one against the other, a couple of lumps of white sugar, and light will be evolved. A similar effect is produced by rubbing two lumps of borate of soda one against the other.
In a dark room, rub smartly one against the other, a couple of lumps of white sugar, and light will be evolved. A similar effect is produced by rubbing two lumps of borate of soda one against the other.