Divination with fire or flames; a good omen resulted when the flames were vigorous and quickly consumed the sacrifice and when the smoke was transparent, neither red nor dark in color, when it didn’t crackle, but burnt silently in a pyramidal form; but a bad omen when it was difficult to kindle, disturbed by wind or slow to consume the victim.

Mantics also observed flames of torches by throwing powdered pitch into the flames. Another aspect is pyroscopy (based on the burn stains left on a light surface after burning a sheet of paper).