OF THE WAY OF WALKING IN MAN.
The walking of man is always after the universal manner of walking in animals with 4 legs, inasmuch as just as they move their feet crosswise after the manner of a horse in trotting, so man moves his 4 limbs crosswise; that is, if he puts forward his right foot in walking he puts forward, with it, his left arm and vice versa, invariably.
III.
PHYSIOLOGY.
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.