The Forster Notebook II

Mathematical calculation for multiplication and division. Leonardo multiplies 1500 by 9 to get 13,500, then divides that result by 12 to reach 1,125.

1500
9

13500
12

1125

The following numbers and diagrams are scattered across the page. They likely relate to architectural proportions or a specific engineering problem.

6

A red chalk diagram depicts a tall, narrow vertical structure. It consists of a rectangle with a diagonal line crossing from the lower left to the upper right corner. This likely represents a study of an architectural column or a lesson in perspective and proportional height.

630

Faint, indistinct sketches in red chalk are visible in the center-left. These appear to be rough exploratory marks of a hand or fabric, though they are heavily obscured by the numerical notations written over them later.

Numerical scratchpad at the bottom of the page.

0 8 5 1 4 1 2 1
0 8 2 3
0 8 2 3
630

calculation, proportion, geometry, column, red chalk original: "sanguine"