Clepsydra with Dragon Spout

A line engraving showing a scientific apparatus against a textured paper background. To the left stands a hexagonal wooden or metal pillar marked with horizontal lines and engraved numerals from 1 to 11. A pipe extends from the base of the pillar to a narrow vertical tube topped by a shallow basin. A mythical creature, depicted as a dragon or sea monster with a flowing mane, emerges from the right to pour a stream of water into the basin. A small cord or wick hangs from the bottom of the pillar's base.

This print illustrates early modern mechanical engineering and the study of fluid dynamics and timekeeping, reflecting the period's fascination with automata and classical hydraulics. It connects to the tradition of 'Theatrum Machinarum', or books of machines, which documented technological innovations through the 17th century.