THEATRICAL INCANTATIONS.
Dissolve crystals of nitrate of copper in spirits of wine. Light the solution, and it will burn with a beautiful emerald green flame. Pieces of sponge soaked in this spirit, lighted and suspended by fine wires over the stage, produces the lambent green flames now so common in incantation scenes; strips of flannel saturated with it, and applied round copper swords, tridents, &c., produce, when lighted, the flaming swords and fire forks brandished by the demons in such scenes; indeed, the chief consumption of nitrate of copper is for these purposes.