On the philosophy of painting: a theoretical and practical treatise.. (1849)
Twining, Henry · London, Longman, Brown, Green, and Longmans · leaf 485
e position of the large figurereflected in the glass, as well as that of the small image).It will be seen by Fig. 23, how a slight inclination of theglass forwards, amounting to only 16°, produces a consi-derable slant in the appearance of the figure reflected, aswell as of the walls of the room.… … The figure, being situated between the observer and the mirror, its reflection isseen profile. The inclination of the reflected image forward is equal to twicethat of the mirror. REFLECTION IN PLANE MIRRORS. 435 An inclination of the mirror upwards, to the same amount,produces exactly the converse…
Painting · Aesthetics · Perspective
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