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Chapter XIV.
OF THOSE IMAGES WHICH ARE PRESENTED TO OUR EYES IN MIRRORS.

EMPEDOCLES says that these images are caused by certain effluvias which, meeting together and insisting upon the superficies of the mirror, are perfected by that fiery quality emitted by the said mirror, which transmutes withal the air that surrounds it. Democritus and Epicurus, that the specular appearances are formed by the subsistence of the images which flow from our eyes; these fall upon the mirror and remain, while the light rebounds to the eye. The followers of Pythagoras explain it by the reflection of the sight; for our sight being extended (as it were) to the brass, and meeting with the smooth dense surface thereof it is struck back, and caused to return upon itself: the same appears in the hand, when it is stretched out and then brought back again to the shoulder. Any one may apply these instances to explain the manner of seeing.

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