* Painting. / * Let all the parts of the animal correspond to its whole, that is, the man who is short and thick must have every limb in himself short and thick. / * Painting. / * Let all the limbs of any animal correspond to its age, that is, the young should not show veins or sinews, as most do to display sharpness of art, spoiling the whole by means of mismatched limbs. / Let the movements of men be such as their dignity or baseness requires.

a – c – b / Whether the fall of water a b is faster at c b than at a b. / c b is as much faster than a b as, over equal length, e b is thinner than a b. And I say the same of motions of uniform obliquity and width in rivers.

a c b

b e a – n – d f c / Because the species of objects are all throughout the air set before them and all in every point of it, it is necessary that the species of our hemisphere enter and pass, together with all the celestial bodies, through the natural point, and imprint themselves on the wall set opposite that point, which is pierced in a thin wall. And for this reason the eastern part will imprint itself on the western part of that wall, and the western on the eastern, and thus the northern on the southern, and conversely, etc. — at which point they infuse and unite in penetrating and intersecting one another, each with the other, and in which the species of the moon in the east and the species of the sun in the west are, at that natural point, united and infused together with our hemisphere. O marvelous necessity, you with supreme reason compel all effects to partake of their causes, and by supreme and irrevocable law every natural action obeys you by the briefest operation. Who would believe that so very small a space could hold the images of the whole universe? O mighty action, what mind can penetrate such a nature? What tongue can unfold such a marvel? Certainly none. This directs human discourse to the contemplation of the divine, etc.

Here the figures, here the colours, here all the species of the parts of the universe are reduced to a single point. O what a point of such marvel! O marvelous, o stupendous necessity, by your law you compel all effects to partake of their causes by the briefest way. These are the miracles, these stupendous ones and ... with which ... almost ... [text lost] ... forms already lost, infused into so very small a space, can be reborn and recomposed in their dilation. How can it be that from confused causes there result distinct and ready effects, such as the species passed through the said natural point?

Whether the spirit can see bodies without having anything in which to receive their species, or not.

a c – f n e – b d / Let the visual power be at e, by which the objects a and b make their figures known by means of the lines a c and b e. I say that for man the crystalline sphere n would still suffice to send the received species to the spirit e, but necessity requires that n be in a dark place.

Write in your anatomy what proportion the diameters of all the spheres of the eye bear to one another, and what distance the crystalline sphere has from them.

Drawings for the works on the Adda, with: Canal of the consortium — Lake — Adda — Lock — Lock — Adda