On the philosophy of painting: a theoretical and practical treatise.. (1849)
Twining, Henry · London, Longman, Brown, Green, and Longmans · leaf 480
lt is a very rapid diminutionof the reflected image ; for, by the removal of themirror, the fasciculi of rays which convey to the eye thereflection of the object, become lengthened simultan-eously both before and after being reflected by themirror (see Fig. 19). In this case, the perspectivechange… … The mirror has been moved backward; the observer andthe object remaining stationary. diminution. When, the observer and the mirror beingstationary, the object is moved away from the latter andtoward the observer, although the diminution of thereflected image is less rapid than when the mirror…
Painting · Aesthetics · Perspective
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