Conny Waters – AncientPages.com – Previously uncounted copies of Isaac Newton’s groundbreaking science book Philosophiae Naturalis Principia Mathematica, known as the ‘Principia’ have been found by a Caltech historian and his former student. тιтlepage and frontispiece of the third edition, London, 1726 (John Rylands Library) The new census more than doubles the number of known […]