Happy Birthday, Principia
Almost missed it…
PhilosophiƦ Naturalis Principia Mathematica, Latin for “Mathematical Principles of Natural Philosophy”, often referred to as simply the Principia, is a work in three books by Sir Isaac Newton, in Latin, first published 5 July 1687
via PhilosophiƦ Naturalis Principia Mathematica – Wikipedia, the free encyclopedia.