II. Linear Perspective: 83.

83.

OF THE PLANE OF GLASS.

Demostration of perspective by means of a vertical glass plane (83-85).Perspective is nothing else than seeing place [or objects] behind a plane of glass, quite transparent, on the surface of which the objects behind that glass are to be drawn. These can be traced in pyramids to the point in the eye, and these pyramids are intersected on the glass plane.