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.