William Stanley Jevons is regarded by many as bringing mathematical methods to the study of economics. The Theory of Political Economy brought together maths and the theory of utility, this contribution marked Jevons as a leading political economist of his time.PART I: INTRODUCTION 1. Mathematical Character of the Science 2. Confusion Between Mathematical and Exact Science 3. Capability of Exact Measurement 4. Measurement of Feeling and Motives 5. Logical Method of Economics 6. Relation of Economics to Ethics PART II: THEORY OF PLEASURE AND PAIN 7. Pleasure and Pain as Quantities 8. Pain the Negative of Pleasure 9. Anticipated Feeling 10. Uncertainty of Future Events PART III: THEORY OF UTILITY 11. Definition of Terms 12. The Laws of Human Want 13. Utility is not an Intrinsic Quality 14. Law of the Variation of Utility 15. Total Utility and Degree of Utility 16. Variation of the Final Degree of Utility 17. Disutility and Discommodity 18. Distribution of Commodity in different Uses 19. Theory of Dimensions of Economic Quantities 20. Actual Prospective and Potential Utility 21. Distribution of a Commodity in Time PART IV: THEORY OF EXCHANGE 22. Importance of Exchange in Economics 23. Ambiguity of the term Value 24. Value Expresses Ratio of Exchange 25. Popular use of the term Value 26. Dimension of Value 27. Definition of Market 28. Definition of Trading Body 29. The Law of Indifference 30. The Theory of Exchange 31. Symbolic Statement of the Theory 32. Analogy to the Theory of the Lever 33. Impediments to Exchange 34. Illustrations of the Theory of Exchange 35. Problems in the Theory of Exchange 36. Complex Cases of the Thoery 37. Competition in Exchange 38. Failure of the Equations of Exchange 39.&l#2