5 July 1687 July 4, 2014 Author: Staff Sir Isaac Newton publishes Philosophiæ Naturalis Principia Mathematica. Famous Words of Inspiration..."Capital is reckless of the health or length of life of the laborer, unless under compulsion from society." Karl Marx — Click here for more from Karl Marx Related posts: 4 July 1569 5 July 1948 5 July 1948 5 July 1946 29 May 1953 29 May 1953 Categories: History Tags: 1687, 5 July