Mechanical Bagpipe Mechanism from Utriusque Cosmi

The image shows an engraving of a mechanical musical apparatus composed of four main sections. To the left, a spiked wooden drum rotates against the pipes of a bagpipe; in the center, an air bladder (the bag) is connected to a cylindrical reservoir. To the right, a bull's head is mounted on the reservoir, with its tongue serving as a nozzle through which air or steam is vented upward. The entire mechanism is presented as a floating technical diagram against a simple, lightly hatched ground.

This illustration originates from Robert Fludd's 'Utriusque Cosmi Maioris scilicet et Minoris metaphysica, physica atque technica Historia' (1617–1621), a key text of the Rosicrucian and Hermetic tradition that sought to map the mathematical and mechanical harmony of the macrocosm and microcosm.