Calculating Disc for Roots, Squares, and Cubes

The image features a large circle divided into three concentric rings and several radial sectors. The innermost section is a solid dark circle, surrounded by rings labeled 'Radix' (roots), 'Quadratus' (squares), and 'Cubus' (cubes). Numerical values increase as one moves outward from the center, demonstrating the exponential growth of powers of base integers. The style is a stark black-and-white copperplate engraving on a lined background.

This diagram belongs to the tradition of early modern mathematical pedagogy, frequently appearing in encyclopedic works of the 17th century that sought to map the order of the cosmos through arithmetic and geometry. It serves as an analog computational aid, illustrating the fundamental relationships between numbers central to Pythagorean and Neo-Platonic number mysticism.