The Forster Notebook II

the rivers that descend from the mountain
whether there is a tide or not, it comes again
+ and the waves and a part original: "p." Leonardo frequently used single letters as abbreviations for "parte" (part) or "punto" (point). in that place will come to
be a mixture original: "mistione." This refers to the physical blending of different types of water, such as fresh river water mixing with salty seawater at an estuary. of that river
and it will be of that color of
how the rivers, the waves, the texture of the m... The text here is likely a fragment of "moto" (motion) or "mare" (sea).
drawn in the manner of the circumferences original: "circumferenzie." of
circles, they will be the thickening of circles
the + and the tide, the various colors

A pen and ink diagram from a Leonardo da Vinci manuscript depicts the intersection of circular waves. Leonardo used these geometric constructions to theorize about the physical behavior of tides and river currents. The drawing shows four primary overlapping circles arranged symmetrically around a central axis. Additional internal lines form a complex rosette pattern. This represents Leonardo's study of wave propagation and interference patterns on water.

continuous original: "binu." This is likely a shorthand for "continuo" (continuous). Leonardo often explored the relationship between continuous quantities and the act of dividing them. to speak of dividing.