Typed version of Newton's Principia Mathematica I need a typed pdf version of Newton's Principia. Is it available for free online? And I also need the proof of universal law of gravity and the elliptical orbits of planets(If there's no typed version).

Here is an 1846 version at archive.org, translated into English by Andrew Motte.
The direct pdf scan is linked here.
Here is another Andrew Motte version, all typed. The entire contents appear to be here, but it is broken into a pdf per chapter (like 40 or so pdfs). You could download each of them and merge into one book if desired.
