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OF ROGER BACON THE ENGLISHMAN, A MOST EMINENT MAN

PERSPECTIVE:

Containing three parts:

The first is about things common to the other two. The next descends in particular to direct vision principally. The third to reflected and refracted vision. The first part has twelve distinctions.

DISTINCTION I.

Which is about the properties of this science, and about the parts of the soul and the brain, and the instruments of seeing: having four chapters.

CHAPTER I.

On the properties of this science.

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Desiring to excite and dispose you and others worthy of wisdom to the science of perspective, you should know that many authors treat this science: but some too little, like Euclid and Jacob Alkindi, and certain others compose various treatises on