Philosophiae Naturalis Principia Mathematica

London, 1687 is the true first, in Latin; there is no earlier or rival edition, and copies of both title-page issues are first-edition copies. The later Latin editions are the Cambridge 1713 second (edited by Roger Cotes) and the London 1726 third (edited by Henry Pemberton). The first edition in English is Andrew Motte's translation, 'The Mathematical Principles of Natural Philosophy', London: printed for Benjamin Motte, 1729, two volumes octavo (197 x 118 mm), with folding engraved plates and folding charts, and with John Machin's laws of the moon's motion added. It is an important book in its own right and should be named alongside the Latin, but it renders the 1726 third edition — so it is a translation first, not the first appearance of the text. 'First edition in English' and 'first edition' are different claims and are routinely conflated in listings.