CONTENTS. 



CHAPTER XXX. 



CLASSIFICATION. 

 SECTION PAGE 



1. Classification 673 



2. Classification involving Induction 675 



3. Multiplicity of Modes of Classification 677 



4. Natural and Artificial Systems of Classification 679 



5. Correlation of Properties 681 



6. Classification in Crystallography 685 



7. Classification an Inverse and Tentative Operation 689 



. 8. Symbolic Statement of the Theory of Classification . . . .692 



9. Bifurcate Classification 694 



10. The Five Predicates 698 



11. Summum Genus and Infima Species 701 



12. The Tree of Porphyry 702 



13. Does Abstraction imply Generalisation ? 704 



14. Discovery of Marks or Characteristics 708 



15. Diagnostic Systems of Classification 710 



16. Index Classifications 714 



17. Classification in the Biological Sciences 718 



18. Classification by Types 722 



19. Natural Genera and Species 724 



20. Unique or Exceptional Objects 728 



21. Limits of Classification .... .730 



BOOK VI. 



CHAPTER XXXI. 



REFLECTIONS ON THE KESULTS AND LIMITS OP SCIENTIFIC METHOD. 



1. Reflections on the Results and Limits of Scientific Method . . 735 



2. 1 he .Meaning of Natural Law 737 



3. Infiniteness of the Universe ......" '733 



4. The Indeterminate Problem of Creation ' 740 



5. Hierarchy of Natural Laws ....... ' "742 



6. The Ambiguous Expression" Uniformity of Nature " ' ' 745 



7. Possible States of the Universe ...... 749 



8. Speculations on the Reconcentration of EnerW ' 7 ( >l 



9. The Divergent Scope for New Discovery ' ' 752 

 J?' j?foi te > TOm PfeteneHs of the Mathematical Sciences' ' '754 



' 6 ln LW in Mental and Social Phenomena . . ' 759 



10 * 



12. The Theory of Evolution ... *-~ 



13. Possibility of Divine Interference ' " ' " 7R5 



14. Conclusion . * * * * S 



............ 766 



INDEX. 



