Geometric Diagrams of Proportion
A rectangle crossed by a rising diagonal with marked points, and a square divided by its diagonal
The recto is filled with Leonardo's mirror-script, present but not transcribed in this bundle, above two small geometric figures set side by side. On the left a rectangle is crossed by a diagonal rising from its lower-left corner, with several points marked along a base line; on the right a square is cut corner to corner by its full diagonal. Short captions sit above each figure, and further annotations in a later hand appear at the top and foot of the leaf.
On this page
Rectangle with a rising diagonal
A wide rectangle is crossed by a line climbing from its lower-left corner, with several small points marked along the lower edge. The stepped points against the diagonal read like a proportional scale.
Square divided by its diagonal
A square is drawn to the right and cut corner to corner by a single diagonal. The figure pairs with the rectangle as a simple proportional construction.
Untranscribed accompanying text
The body of the page and the short captions above the diagrams are written in Leonardo's mirror-script, with later-hand notes at top and bottom. No transcription is provided in this bundle, so the wording is not given.