Contents -- Introduction -- The Shorter Treatise on the Purity of the Art of Logic -- The First Part: On General Rules -- The First Subpart: On General Rules of Inferences -- The Second Subpart: The Treatise on Syncategoremata -- The Longer Treatise on the Purity of the Art of Logic -- Tract 1: On the Properties of Terms -- Part One: On Supposition -- Part Two: On Appellation -- Part Three: On Copulation -- Tract 2: On Hypothetical Propositions and Syllogisms -- Part One: On Conditional Hypothetical Propositions -- Part Two: On the Manner of Arguing Syllogistically in Hypothetical Conditionals -- Part Three: On Other Hypothetical Propositions -- Subpart 1: On Other Explicit Hypotheticals -- Subpart 2 : On Implicit Hypotheticals -- Appendix: Tables of Parallel Passages -- Select Annotated Bibliography -- Index of Persons -- Index of Propositions, Rules, and Sophisms -- Index of Topics.