CHAP. VIII. METHODS OF INDUCTION DEPENDING ON RESEMBLANCE 220 _Sect._ I. _The Law of Continuity._ _Art._ 1. Its Nature and Application, 2. To Falling Bodies, 3. To Hard Bodies, 4. To Gravitation. 5. The Evidence. {xxi} _Sect._ II. _The Method of Gradation._ _Art._ 6. Occasions of its Use. 7. Examples. 8. Not enjoined by Bacon. 9. Other Examples. 10. Its Value in Geology. 11. Limited Results. _Sect._ III. _The Method of Natural Classification._ _Art._ 12. Examples of its Use. 13. Its Process. 14. Negative Results. 15. Is opposed to Arbitrary Definitions. 16. Propositions and Definitions correlative. 17. Definitions only provisional. CHAP. IX. OF THE APPLICATION OF INDUCTIVE TRUTHS 233 _Art._ 1. This forms the Sequel of Discovery. 2. Systematic Verification of Discoveries. 3. Correction of Coefficients. 4. Astronomy a Model. 5. Verification by new cases. 6. Often requires fresh calculation. 7. Cause of Dew. 8. Useful Applications. CHAP. X. OF THE INDUCTION OF CAUSES 247 _Art._ 1. Is to be pursued. 2. Induction of Substance. 3. Induction of Force. 4. Induction of Polarity. 5. Is Gravity Polar? 6. Induction of Ulterior Causes. 7. Of the Supreme Cause. {xxii} BOOK IV, OF THE LANGUAGE OF SCIENCE. INTRODUCTION 257 APHORISMS CONCERNING THE LANGUAGE OF SCIENCE.