Leonardo da Vinci Quote
The boundaries of bodies are the least of all things. The proposition is proved to be true, because the boundary of a thing is a surface, which is not part of the body contained within that surface; nor is it part of the air surrounding that body, but is the medium interposted between the air and the body, as is proved in its place.
The Notebooks of Leonardo da Vinci (Richter, 1888) - II Linear Perspective
