A translation by Thomas Steele Hall, an historian of physiology, of the 1664 edition of Descartes' L'Homme (ed. Claude Clerselier). Includes an introduction, review of Descartes' physiology, a synopsis of the first French edition, bibliographical materials (editions and sources of L'Homme), and extensive interpretive notes. Also incorporates the French text of 1664 of L'Homme. Forward by I. B. Cohen.