NEWTON, Sir ISAAC. Philosophiae naturalis principia mathematica... Editio tertia aucta & emendata. London: W. & J. Innys, 1726. Engraved portrait frontispiece by G. Vertue after I. Vanderbank, title in red and black, numerous illustrations in text. 4to, contemporary calf, rebacked. Third edition, edited by Henry Pemberton. The last edition published during the author's lifetime and the basis of all subsequent editions. Babson 13.