Proportional Grid Analysis of a Mermaid

This engraving displays two depictions of a mermaid, with a numbered numerical grid (1-11 horizontally, 1-11 vertically) overlaid on each to demonstrate perspective and proportional scaling. The mermaid on the left is in left profile, while the one on the right is turned to a three-quarter view; both have flowing hair, bare breasts, and a serpentine fish tail curving behind them. The figure on the right holds an oval hand mirror. The drawing style uses clear, rhythmic linework characteristic of early modern technical illustration.

This print exemplifies the application of mathematical grid systems to anatomical and naturalistic drawing, a methodology central to the Renaissance and Baroque art-theoretical tradition of 'perspectiva' as found in the writings of Albrecht Dürer and later geometric treatises on proportion.