HARMLESS EXPLOSION.
Powder four grains of chlorate of potash in a mortar, and add a little flower of sulphur, pulverized very finely. On rubbing the two powders together, a sharp but harmless detonation will result.
Powder four grains of chlorate of potash in a mortar, and add a little flower of sulphur, pulverized very finely. On rubbing the two powders together, a sharp but harmless detonation will result.