‹‹‹ Vitr. 10.2.4 | Table of Contents | Vitr. 10.2.6 ›››
5If exceedingly large weights are to be raised, they must not be trusted to a mere axle; but the axle being retained by the gudgeons, a large drum should be fixed on it, which some call a drum-wheel (tympanum): the Greeks name it ἀμφίρευσις, or περίτροχος.
5But if the loads of material for the work are still more colossal in size and weight, we shall not entrust them to a windlass, but set in an axle-tree, held by sockets as the windlass was, and carrying on its centre a large drum, which some term a wheel, but the Greeks call it ἁμφἱεσις or περιθἡκιον.