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THE SECOND PART

OF A VERY ILLUSTRIOUS MATHEMATICAL ELUCIDATION

You have in this work, Kind Reader, certain fragmentary lucubrations from Geometry which it is a pleasure to have brought to light, and indeed to teach concerning perspective, and the refraction and reflection of the rays of sight and light, [and their] nature and form in various transparent bodies—spherical, cylindrical, pyramidal, concave, and convex; so that it might show some images as equal to their true figure, some larger, some smaller?, some upright, some inverted, some within a sphere and others indeed hanging in the air in a large space outside; some very remote, some standing near before the eyes, by which, being opposed either to the Sun or to the burning flames of fire, it might also extinguish? fire, then with diverse? shadows and rays, according as the sign? concerning the diversity? of refraction is properly and naturally traced. Experience, therefore, this fruit which can be of benefit not only to you but to others as well...?