Notes and Sketches on Physiognomy

8/10 These fractions likely represent the ratio of specific facial features—such as the forehead or nose—relative to the total height of the head.

7/10

1 ∠ 5 This notation may indicate an angle or a specific measurement used in the "canon of proportions," a system used by Renaissance artists to create idealized or realistic human figures.

symbols and numbers?

The sketches depict three distinct human profiles in ink, showing a variety of facial types and hairstyles, ranging from a youthful figure to an older man with more pronounced features.