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Chap. CCCXLIV.—Why a painted Object does not appear so far distant as a real one, though they be conveyed to the Eye by equal Angles. If a house be painted on the pannel B C, at the apparent distance of one mile, and by the side of it a real one be perceived at the true distance of one mile also; which objects are so disposed, that the pannel, or picture, A C, intersects the pyramidical rays with the same opening of angles; yet these two objects will never appear of the same size, nor at the same distance, if seen with both eyes. Chap. CCCXLV.—How to draw a Figure standing upon its Feet, to appear forty Braccia high, in a Space of twenty Braccia, with proportionate Members. In this, as in any other case, the painter is not to mind what kind of surface he has to work upon; particularly if his painting is to be seen from a determined point, such as a window, or any other opening. Because the eye is not to attend to the evenness or roughness of the wall, but only to what is to be represented as beyond that wall; such as a landscape, or any thing else. Nevertheless a curved surface, such as F R G, would be the best, because it has no angles.