Newton (Sir Isaac) Philosophiae naturalis principia mathematica, third edition, half-title, title in red & black, lacking imprimatur, engraved portrait and final advertisement leaf (the first two supplied in rather crude facsimile), with woodcut diagrams, engraved illustration, a few old ink marginalia to text and ink diagram to front free endpaper, some light foxing at beginning, first leaf of text stained, ex-library copy with trace of stamp to foot of title and ink stamp to a few lower margins, modern panelled calf ruled and tooled in blind, red roan labels, spine slightly faded, [Babson 13; Wallis 9], 4to, William & John Innys, 1726.

⁂ The third edition and the last published during the author's lifetime. It is the basis of all subsequent editions and contains a new preface by Newton and a substantial number of alterations, "the most important being the scholium on fluxions, in which Leibnitz is mentioned by name." (Babson).