Descartes Published the Latin text of his Meditations in 1641 and its French translation, by the Due de Luynes, in 1643. There have been many subsequent editions of this version, the most recent being that of M. André Robinet and Mile Anne Becco. In addition to the original text, this edition contains a more or less complete index, a mini-concordance, and some other valuable statistical information. In this brief study we use this index as the basis for an investigation of some of the conceptual ties in this historically important and still very controversial work.