OF SIMPLE DERIVED SHADOWS.
The simple derived shadow is of two kinds: one kind which has its length defined, and two kinds which are undefined; and the defined shadow is pyramidal. Of the two undefined, one is a column and the other spreads out; and all three have rectilinear outlines. But the converging, that is the pyramidal, shadow proceeds from a body that is smaller than the light, and the columnar from a body equal in size to the light, and the spreading shadow from a body larger than the light; &c.
OF COMPOUND DERIVED SHADOWS.
Compound derived shadows are of two kinds; that is columnar and spreading.
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.