Rechenspiegel: Diagram of Ternary Numerical Progression

The image is a monochrome woodcut diagram composed of concentric circles divided into radial segments. The center is a solid black circle, surrounded by rings that populate increasing numerical values moving outward, progressing from 1 to 1000 and beyond, labeled with Latin terms for order and quantity. The bottom half contains a vertical column of words including 'Duo', 'Quatuor', 'Sex', and 'Octo', while the outer arc features curved Latin inscriptions describing the mathematical relationships of the sections. The hatching indicates depth, creating a visual effect of a concave or convex lens representing numeric growth.

This print originates from the 'Utriusque Cosmi' (The Great Work of the Two Worlds) project, typical of the 17th-century preoccupation with universal mathematical languages and the mapping of cosmic order. It reflects the early modern synthesis of natural philosophy and arithmology, seeking to visualize the structural hierarchy of number theory.