Sir Isaac Newton's Mathematical Principles of Natural Philosophy and His System of the World [Principia, Motte's Translation Revised by Cajori]

xxxv, 680 pp. Two volume set. Volume 1 contains the prefaces of the first three editions, Definitions, Axioms, or Laws of Motion, and Books I and II of the original. Volume 2 contains Book III, "The System of the World," and the notes, historical and explanatory, prepared by Cajori.