Madrid Manuscript II

The codex, compiled in Florence between 1503 and 1505, presents notes and drawings related to the Pisa War, projects for the alteration of the course of the river Arno, notes on applied geometry and stereometry, painting, optics, perspective, architecture (the closing notebook, added at a later point, is dated 1493). Among the books mentioned by Leonardo in this zibaldone, is the second version of the treatise by Francesco di Giorgio, the Elements of Euclid and the Summa de arithmetica by Luca Pacioli, which provided the source for the drawing of the tree of proportions (f. 78r, cf. Summa, f. 82r).