CONTENTS 



CHAPTER I. FACTS AND FACTORS OF DEVEL- 

 OPMENT 



INTRODUCTION 



A. PHENOMENA OF DEVELOPMENT 



I. DEVELOPMENT OF THE BODY 



1. The Germ Cells 



2. Fertilization 



3. Cleavage 



4. Embryogeny 



5. Organogeny 



6. Oviparity and Viviparity 



7. Development of Functions 



II. DEVELOPMENT OF THE MIND 



1 . Sensitivity 



2. Tropisms, Reflexes, Instincts 



3. Memory 



4. Intellect, Reason 



5. Will 



6. Consciousness 



B. FACTORS OF DEVELOPMENT 



1. Preformation 



2. Epigenesis 



3. Preformation and Epigenesis 



4. Heredity and Environment 



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