The Forster Notebook II

Page 9

This page is nearly blank. It contains only a faint geometric sketch in the upper right quadrant and a folio number.

A faint, preparatory geometric study by Leonardo da Vinci. The sketch depicts a circle with internal intersecting lines, likely a study of proportions or the properties of inscribed polygons. Such mathematical exercises are characteristic of the drawings found throughout his notebooks. This sketch demonstrates Leonardo’s habit of exploring geometry even on otherwise blank leaves.