PREFACE; LIST OF ABBREVIATIONS; INTRODUCTION; THE TIMAEUS; INTRODUCTORY CONVERSATION; THE DISCOURSE OF TIMAEUS; 27C-29D. PRELUDE. The nature and scope of Physics (I) Being and Becoming (2) The Cause of Becoming (3) Model and copy Physics only a • likely story' I. THE WORKS OF REASON; II WHAT COMES ABOUT BY NECESSITY; III THE CO-OPERATION OF REASON AND NECESSITY; EPILOGUE