Citation - Pennsylvania Gazette-Philadelphia: 1729.09.18

PG-P.729.034
25 Sep 1729:12 (39)
[Under definitions of "air"]  Air in Musick, signified the
melody, or the inflection of a musical composition.
   The word is also used for a song it self.
   Airs in horsemanship, the artificial or practiced motions
of a manag'd horse.
   Such are the demi-volt, curvet, capriole, croupade,
balotade, and step and leap.