Frontmatter -- Acknowledgments -- Abbreviations of Peirce's Works and Archives -- Introductory Note -- Foreword -- Contents -- General Introduction to Logic of the Future -- Introduction to the Theory of Existential Graphs, Volumes 2/1 and 2/2 -- Introduction to Volume 2/1: The Logical Tracts -- References -- Part IV: The Logical Tracts (1903) -- 29 Logical Tracts. No. 1. On Existential Graphs -- 30 Logical Tracts. No. 2. On Existential Graphs, Euler's Diagrams, and Logical Algebra -- 31 On Logical Graphs [Euler Diagrams] -- Bibliography of Peirce's References -- Catalogue of Peirce's Writings -- Name Index -- Keyword Index