- Warren Anderson
- and Thomas J. Mathiesen
(fl Alexandria, 3rd century bce). Greek inventor. According to earlier scholarship, he was active during the reign of Ptolemy Euergetes I (246–221 bce). A review of the evidence by Perrot, however, supports the conclusion that he was active about 270 bce, the period of Ptolemy Philadelphus. He enjoyed wide fame in antiquity for his mechanical devices operated by the pressure of water or air. Often these were elaborate toys created to amuse the court: one such was a water-clock, with sounding trumpets among its ingenious fittings, made for Ptolemy's queen Arsinoë....