Equal objects appear smaller with distance
A ruled perspective construction: three equal bodies seen along lines to the eye
The note above the drawing states the perspective law that, among things of equal size, the one farther from the eye appears smaller. The construction demonstrates it with a large compass arc and ruled lines converging from a single point down to three equal circular bodies set in a row along the base. The point of convergence stands for the eye, from which the sightlines fan out to the objects.
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The law of apparent diminution with distance
Among things of equal size, the one that is farther from the eye will show itself as the smaller figure. The statement fixes the basic rule of linear perspective governing how equal bodies shrink in appearance as they recede.
Sightlines from the eye to three equal bodies
Ruled lines converge from a single upper point — standing for the eye — down to three equal circular objects arranged along the base, showing how the visual rays span each in turn. A large compass arc frames the construction.