SECT. I.
ARTIC.
- 1 THe Clasp, or Ligament of this, to the prae∣cedent Chapter.
- ibid.
- 2 The Authors Notion of the Rays of Light.
- ibid.
- 3 A Parallelism betwixt a stream of Water ex∣silient from the Cock of a Cistern, and a Ray of Light emanent from its Lucid Fountain.
- ibid▪
- PRAECONSIDERABLES.
- 199
- 4 Light distinguisht into Primary, Secondary, &c.
- 199
- 5 All Light Debilitated by Reflection: and why.
- ibid.
- 6 An Example, sensibly demomonstrating the same.
- 200
- 7 That light is in perpetual Motion; accor∣ding to Aristotle.
- ibid.
- 8 Light, why Corroborated, in some cases, and Debilitated in others, by Refraction.
- 201
- COROLLARY. Why the Figure of the Sun, both rising and setting, appears rather Ellipti∣cal, than Sphaerical.
- ibid.
- 9 PARADOX. That the proportion of So∣lary Rays reflected by the superior Aer, or Ae∣ther, toward the Earth, is so small, as not to be sensible.
- 202
- 10 That every Lucid Body, as Lucid, doth emit its Rays Sphaerically: but, as Visible; Py∣ramidally.
- ibid.
- 11 That Light is invisible in the pure medium.
- 203