e Sciences 43

V. & VI. Demonstration and Necessary Truths 46

BOOK III.

INDUCTION.

I. Preliminary Observations on Induction in general 53

II. Inductions improperly so called 54

III. The ground of Induction 57

IV. Laws of Nature 58

V. The Law of Universal Causation 60

VI. The Composition of Causes 66

VII. Observation and Experiment 67

VIII. & Note to IX. The Four Methods of Experimental
Enquiry 69

X. Plurality of Causes, and intermixture of Effects 73

XI. The Deductive Method 76

XII. & XIII. The Explanation and Examples of the Explanation
of Laws of Nature 77

XIV. The Limits to the Explanation of Laws of Nature;
and Hypotheses 79

XV. Progressive Effects, and continued Action of
Causes 81

XVI. Empirical Laws 83

XVII. Chance, and its Elimination 85

XVIII. The Calculation of Chances 87

XIX. The Extension of Derivative Laws to Adjacent Cases 89

XX. Analogy 91

XXI. The Evidence of the Law of Universal Causation 92

XXII. Uniformities of Coexistence not dependent on Causation 94

XXIII. Approximate Generalisations, and Probable Evidence 96

XXIV. The remaining Laws of Nature 99

XXV. The grounds of Disbelief 103

BOOK IV.

OPERATIONS SUBSIDIARY TO INDUCTION.

I. Observation and Description 107

II. Abstraction, or the Formation of Conceptions 108

III. Naming as Subsidiary to Induction 111

IV. The Requisites of a Philosophical Language, and the
Principles of Definition 112

V. The Natural History of the Variatio