In removing a Body to a distance from the Eye, that part which is smallest, will discontinue its appearance before that which is larger: This is observable in the Minute Particles of Bodies, and in the slender Limbs of Animals; for instance, in the Horns and Legs of a Deer, which are lost to the Eye, at a much less distance than its Body. In general, however, it may be observed that the first thing which disappears in an Object, is its Contour which bounds it, and which determines it to be of that Figure.