A beautiful green fire may be thus made: Take of flour of sulphur,
thirteen parts; nitrate of baryta, seventy-seven; oxy-muriate of
potassa, five; metallic arsenic, two; and charcoal, three. Let the
nitrate of baryta be well dried and powdered; then add to it the other
ingredients, all finely pulverized, and exceedingly well mixed and
rubbed together. Place a portion of the composition on a small tin pan
having a polished reflector fitted to one side, and set fire to it,
when a splendid green illumination will be the result. By adding a
little calamine, it will burn more slowly.