Page:Pyrotechnics the history and art of firework making (1922).djvu/205

 of the case, which is then dipped in a mixture of sealing-wax and glue.

Under the same head fall the Light group, which are wide and comparatively thin cases filled with coloured or "bright" (as white composition is known in the trade) composition. They are used either for illuminating as Bengal lights, or for signalling purposes; if for the latter, they are generally provided with a wooden handle and some means of self-ignition.

The name Bengal light is probably based on the use of Bengal saltpetre, and does not indicate their origin in that province.