Table of contents : Cover Title Preface Contents Chapter I Various Approaches to Essence Chapter II The Being Proper to Essence Chapter III Adventitious Aspects of Essence Chapter IV Pure Being Chapter V Complex Essences Chapter VI Implication Chapter VII The Basis of Dialectic Chapter VIII Essences as Terms Chapter IX Instances of Essences Chapter X Essences All Primary Chapter XI Comparison with Some Kindred Doctrines Postscripts Index