On the philosophy of painting: a theoretical and practical treatise.. (1849)
Twining, Henry · London : Longman, Brown, Green, and Longmans · leaf 477
stance, that the apparent diniiiiutioii u\ tlieimage is in every case exactly relative to the length ofthe <;onc or fasciculus of rays, which, enianatini;- fromthe object, is reflected back to the eye. He mightobserve, in the first place, that as he moves from aposition at some distance from the… … J/ie observer is situated at some distance frmit the nh/rcl,which itself is near the mirror. himself remains stationary, but causes the mirror to bemoved backwards, the Icsult is a very rapid diminutionof the reflected image ; for, bv the removal of themirror, the fasciculi of rays which convey to…
Painting · Aesthetics · Perspective
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