Many scholars have felt that the Heronian passage [on a pipe-organ moved by an anemourion-like wheel] can be disregarded because it is not confirmed by other writings. Heron presumably mentioned the anemourion in a moment of distraction, forgetting that it had not been invented yet. We know that he was given to such lapses.

4.7, "Use of Natural Power", p. 126 - The Forgotten Revolution: How Science Was Born in 300 BC and Why It Had to Be Reborn (2004)