Note 24 — PROPORTION.
J. F. (John Francis) Rigaud translation
The eyeball moving up and down to look at the hand, describes a part of a circle, from every point of which it sees it in an infinite variety of aspects. The hand also is moveable ad infinitum (for it can go round the whole circle—see chap. lxxxvii.), and consequently shew itself in an infinite variety of aspects, which it is impossible for any memory to retain.