Libanomancy

Libanomancy (from λἱβανος, the frankincense tree, and μαντεία, divination), a species of divination (q.v.) which was performed by throwing a quantity of frankincense into the fire, and noting the odor which it emitted. If it burned quickly and gave out an agreeable smell, the omen was favorable; but if the reverse took place, it was unfavorable.