You can download a free ebook edition of Tractatus with nice MathML formulas at Standard Ebooks: https://standardebooks.org/ebooks/ludwig-wittgenstein/tractatus

You can download a free ebook edition of Tractatus with nice MathML formulas at Standard Ebooks: https://standardebooks.org/ebooks/ludwig-wittgenstein/tractatus-logico-philosophicus/c-k-ogden https://standardebooks.org/ebooks/ludwig-wittgenstein/tracta...