Those Parts of a Body which are the most Minute, are found to be the first, which disappear, at a Distance from the Eye: the Reasons are, that unequal Objects, being placed at equal Di stances, the smallest will be seen by the Eve under the acutest Angle; and that our Knowledge or Discernment of Bodies, is more imperfect as their Bulk is narrower and more confined. It follows, therefore, that when a larger Bulk is so far removed, as that the Angle which it subtends at the Eye, is so acute, as to be but barely perceptible; a quantity still less, must be entirely lost, and remain wholly invisible.