TABLE OF CONTENTS 



SECTION I FIRST PRINCIPLES 



PAGE 



DEFINITION OF SCIENCE i 



AIM OF SCIENCE 5 



BOUNDARIES OF SCIENCE n 



THE RELATION OF PHILOSOPHY TO SCIENCE 25 



THE SENSES THE AGENTS OF THE MIND 29 



THE EXTENSION OF THE SENSES BY ARTIFICIAL AIDS . . 40 



CLASSIFICATION OF THE SCIENCES 45 



HISTORY OF SCIENCE 49 



METHOD OF SCIENCE 53 



SECTION II CERTAIN PROBLEMS OF THE DAY 



THE AGE OF THE EARTH 63 



THE ULTIMATE CONSTITUTION OF MATTER 74 



THE ORIGIN OF SPECIES 90 



THE CAUSE OF THE COAGULATION OF BLOOD 105 



THE FUNCTION OF NERVE-FIBRES AND NERVE-CELLS . . 115 



MlCROPHYTOLOGY 129 



(vii) 



