books.google.co.uk - First translated from the Latin by Andrew Motte in 1729, the translation has been revised, the antiquated mathematical terms have been rephrased in terms intelligible to the modern scientist, and an historical and explanatory appendix has been supplied by Florian Cajori, one-time Professor of the History...https://books.google.co.uk/books/about/Sir_Isaac_Newton_s_Mathematical_Principl.html?id=lSoJ2tJKfIEC&utm_source=gb-gplus-shareSir Isaac Newton's Mathematical Principles of Natural Philosophy and His System of the World