AcknowledgementsAbbreviationsIntroductionLudwig Wittgenstein: A Brief ChronologyA Note on the TextTractatus Logico-PhilosophicusNotes to the TractatusAppendix A: Influences and AntecedentsFrom Plato, TheaetetusFrom Arthur Schopenhauer, The World as Will and Idea (1859)From Heinrich Hertz, The Principles of Mechanics Presented in a New Form (1894)From Paul Engelmann, Letters from Ludwig Wittgenstein with A Memoir (1968)Appendix B: Gottlob Frege's Philosophical WritingsFrom Gottlob Frege, "Sense and Meaning" (1892)From Gottlob Frege, "On the Foundations of Geometry" (1906)Appendix C: Writings by Bertrand RussellFrom Alfred North Whitehead and Bertrand Russell, Principia Mathematica (1910)From Bertrand Russell, "Mathematical Logic as based on a Theory of Types" (1908)From Bertrand Russell, Theory of Knowledge: The 1913 Manuscript (1913)From Bertrand Russell, Introduction to the Tractatus Logico-Philosophicus (1922)Appendix D: Additional Material by WittgensteinFrom Wittgenstein's Letters to Russell (1912-19)From Ludwig Wittgenstein, "A Lecture on Ethics" (1929)BibliographyIndex