Philosophical dissertations, with proper reflections, [electronic resource] : proving I. The non-eternity of matter; and that there is a vacuum. II. That there must necessarily be one Self-Existent Being in Three Self-Existent Properties, with Attributes infinitely perfect. Prov'd a Priori. III. That the Light and Heat of the Sun, dispersed into the Planetary System, are purely Spirituous, and carry along with them no Particles or Effiuvia of Real Matter, as hath been suppos'd by the Defendants of a Plenum. IV. That the soul is immortal. By Benjamin Parker, Author of the Philosophical Meditations.