to the Theory of Categories.- One The Strict and the Extended Senses of Being.- I. The Ambiguity of IS and the Unity of the Concept of Being.- A. Being in the strict sense and in the extended sense.- B. Beings in the strict sense and in the extended sense.- C. General objects as beings in the extended sense.- D. Universals and their specifications.- E. The bizarre distinction between being and existence.- II. Real and Fictive Parts of Being.- A. Universal, genus, species and individual.- B. Ways of combining objects of thought.- C. Unity, things and parts of things.- D. Fictive parts of things.- E. The part-whole relation with reference to collectives, continua, and accidents.- III. Being and Intensity.- A. Incomplete entelechy and intensity.- I. Aristotle's doctrine of incomplete entelechy.- II. The traditional conception of intensity and the Aristotelian definition of motion.- III. Critique of the traditional doctrine of intensity.- IV. The connection between the theory of intensity and the theory of multiple quality.- B. Intensity of mass, elasticity and impenetrability.- C. Intensity of effect.- D. Kant's doctrine of intensity.- Two Preliminary Studies for the Theory of Categories.- I. Aristotle's Theory of Categories: Interpretation and Critique.- A. The fundamental ideas and the fundamental errors.- B. The meaning of the Aristotelian theory of categories: substance as principle of individuation.- C. Toward a reform of the Aristotelian theory of categories.- II. Substance.- A. Philosophical conceptions of substance.- B. Derivation of the concept of substance.- C. Substance and accident.- D. Substance, self, and self-awareness.- III. Relations.- A. On that which is relative to something.- B. Sameness and difference and how we apprehend them.- C. Sameness, similarity, and analogy.- D. On the concept of efficient cause.- E. The temporal relation between cause and effect.- F. The temporal relation in causation and in self-preservation.- Three The Final Three Drafts of the Theory of Categories.- I. The First Draft of the Theory of Categories.- A. The ambiguity and unclarity of words and syntactic structures.- B. The types of predication.- I. Spurious predications.- II. Genuine predications and ultimate subjects.- III. Predications and pluralities.- C. The passive affections.- D. Comparison with the Aristotelian theory of categories.- E. The problem of the criteria for distinguishing categories.- F. The copula in genuine predications.- G. Addendum: the compatibility of accidents within the same category.- II. The Second Draft of the Theory of Categories.- A. The unreliability of grammar as a guide to descriptive psychology.- B. Genuine and spurious predications.- C. Synopsis and supplement.- D. Excursus on the so-called abstracta.- III. The Third Draft of the Theory of Categories.- IV. Appendix: The Nature of the Physical World in the Light of the Theory of Categories.- Editorial notes by Alfred Kastil.- Index to Brentano's text.