Capnomancy

1610, Vives in J. Healey Saint Augustine of the Citie of God Diuination generally was done by diuers means...by smoake, Capnomancy.

To these is also added Capnomancy, so called from smoke, because it searcheth into the flame and smoke; and thin colors, sounds and motions when they are carried upright, or on one side, or round...