5 July 1687 July 4, 2015 Author: Staff Isaac Newton publishes Philosophiæ Naturalis Principia Mathematica. Famous Words of Inspiration..."Can miles truly separate you from friends... If you want to be with someone you love, aren't you already there?"Richard Bach" — Click here for more from Related posts: 5 July 1687 17 October 1979 4 July 1569 5 July 1948 5 July 1948 5 July 1946 Categories: History Tags: 1687, 5 July