| I. Continuity and Irrational Numbers |
|   |   | Preface |
|   | 1. Properties of Rational Numbers |
|   | 2. Comparison of the Rational Numbers with the Points of a Straight Line |
|   | 3. Continuity of the Straight Line |
|   | 4. Creation of Irrational Numbers |
|   | 5. Continuity of the Domain of Real Numbers |
|   | 6. Operations with Real Numbers |
|   | 7. Infinitesimal Analysis |
| II. The Nature and Meaning of Numbers |
|   |   | Prefaces |
|   | 1. Systems of Elements |
|   | 2. Transformation of a System |
|   | 3. Similarity of a Transformation. Similar Systems |
|   | 4. Transformation of a System in Itself |
|   | 5. The Finite and Infinite |
|   | 6. Simply Infinite Systems. Series of Natural Numbers |
|   | 7. Greater and Less Numbers |
|   | 8. Finite and Infinite Parts of the Number-Series |
|   | 9. Definition of a Transformation of the Number-Series by Induction |
|   | 10. The Class of Simply Infinite Systems |
|   | 11. Addition of Numbers |
|   | 12. Multiplication of Numbers |
|   13. Involution of Numbers |
|   14. Number of the Elements of a Finite System |