Note 665 — Chapter IV · THE SCENERY
Reading edition
Poll. iv. 130 κεραυνοσκοπεῖον ... περίακτος ὑψηλή. Heron, l.c. p. 265. Weismann (l.c. p. 48), who was the first to draw attention to the passage in Heron, supposes that there was a periaktos high up in the back-scene, and that an apparatus like that of Heron’s was fastened to all three sides of it, so that by revolving the periaktos three successive flashes might be exhibited.