The Origins and Sources of Newton’s Classical Scholia

This article traces the conceptual origins of Newton's draft scholia to Propositions IV through IX of Book III of the Principia to a manuscript booklet of observational data. By coordinating passages marked by dog-eared pages in Newton's books with his correspondence and working papers, it is possible to date these references to a time when he was still actively working on the Principia itself. This provides the basis for a new interpretation of Newton's uses of Egyptian and Graeco-Roman antiquity to counter rival histories of astronomy and philosophy influenced by Descartes.