- The Apocalyptic Numbers
- Other Higher Numbers
- Some Hindoo (Hindu) Uses Of Numbers
- Thirteen. 13.
- Twelve. 12.
- Eleven. 11.
- The Decad. 10.
- The Ennead. 9.
- The Ogdoad. 8.
- The Heptad. 7.
- The Hexad. 6.
- The Pentad. 5
- The Tetrad. 4.
- Three and A Half, 3½
- The Triad. 3.
- The Dyad. 2.
- The Monad. 1.
- Part III. The Kabalah On Numbers
- Part II. Pythagorean Views on Numbers
- Part I. Pythagoras, his Tenets and his Followers
- Preface to the Second Edition, 1902
- Preface to the First Edition, 1890
- Title Page