gradually and insensibly, and as the bodily and intellectual Organs are form'd; and that for this wise and gracious End, That the moral Powers and Virtues of the Soul may have Time, Liberty and Leisure, by repeated Acts, to turn into Habits, and so all three may equally develop and extend together, (viz.) the natural and radical Powers, (which in their Capacity, and original Energy, are invariable) and the moral Attributes of the Soul, and their mechanical and material Organs. 5thly, But what is in this Case a Demonstration, is, that all the vital Functions and Sensations, are all perform'd by the Spirit, by the Intermediation only of Motions, Vibrations and Tremors, properly modify'd and impress'd by Bodies, or their Effluvia, on rightly dispos'd membranous Tubuli, elastic Threads or Filaments; which Motions or Vibrations, the Soul naturally, and by its own innate and radical Powers and Sa|gacity, knows to denote the Presence of such and such Bodies, and their Actions. Thus See|ing is perform'd by the Impressions of the Rays of Light, emitted or reflected by the Surfaces of Bodies, which by the Size of their component Particles, and other Circumstances, exciteing par|ticular Vibrations and Undulations on the elastic optic Nerves, point out to the sagacious Spirit (innately and naturally endow'd with such a Ca|pacity of Perceiving and Judging) the Presence of such and such Bodies: And in a Manner analo|gous to this, is Hearing, Feeling, and all the other 0