Though the efficient Cause of _Gravity_ be so obscure, yet the final Cause thereof is clear enough; for it is by this single _Principle_, that the _Earth_ and all the _Cœlestial Bodies_ are kept from _Dissolution_; the least of their _Particles_ not being suffer'd to recede far from their _Surfaces_, without being immediately brought down again by Virtue of this _Natural Tendency_; which, for their Preservation, the Infinite Wisdom of their _Creator_ has ordained to be towards each of their _Centers_; nor can the _Globes_ of the _Sun_ and _Planets_ otherwise be destroy'd, but by taking from them this Power of keeping their Parts united. The Affections or Properties of _Gravity_, and its manner of acting upon _Bodies falling_, have been in a great measure discovered, and most of them made out by _Mathematical Demonstration_ in this our _Century_, by the accurate diligence of _Galilæus_, _Torricellius_, _Hugenius_, and others, and now lately by our worthy Countryman, Mr. _Isaac Newton_, which Properties it may be very material here to enumerate, that they may serve for a Foundation to all those that shall be willing to spend their Thoughts in search of the true Cause of this _Descent of Bodies_. The first Property is, That by this Principle of _Gravitation_, all Bodies do descend towards a Point, which either is, or else is very near to the Center of Magnitude of the Earth and Sea, about which the Sea forms it self exactly into a _Spherical Surface_, and the _Prominences_ of the Land, considering the Bulk of the whole, differ but insensibly therefrom. _Secondly_, That this Point or Center of _Gravitation_, is fix'd within the _Earth_, or at least has been so, ever since we have any _Authentick History_: For a Consequence of its Change, though never so little, would be the over-flowing of the low Lands on that side of the _Globe_ towards which it approached, and the leaving new Islands bare on the opposite side, from which it receded; but for this Two Thousand Years it appears, that the low Islands of the _Mediterranean Sea_ (near to which the ancientest Writers liv'd) have continued much at the same height above the Water, as they now are found; and no _Inundations_ or _Recesses_ of the _Sea_ arguing any such Change, are recorded in History; excepting the _Universal Deluge_, which can no better way be accounted for, than by supposing this Center of _Gravitation_ removed for a time, towards the middle of the then inhabited Parts of the World; and a change of its Place, but the Two Thousandth Part of the _Radius_ of this _Globe_, were sufficient to bury the Tops of the highest Hills under Water.