XI 



TABLE OF CONTENTS 

 INTRACELLULAR PANGENESIS 



PAGE 



Author's Introduction 3 



PART I 



Pangenesis 



A. The Nature of Hereditary Characters. 



Chapter I. The Mutual Independence of Hereditary Characters. 



1. The Combination of Specific Characters Out of 



Hereditary Characters H 



2. The Similarity of the Differences Between Species 



and Between Organs 15 



3. The Similarity Between Secondary Sexual Characters 



and Specific Attributes 18 



4. The Variation of the Individual Hereditary Char- 

 acters Independently of One Another 19 



5. The Combination of Hereditary Characters 24 



6. Cross- and Self-Fertilization 29 



7. Conclusion 33 



B. Prevailing Views on the Bearers of Hereditary 



Characters. 



Chapter II. The Significance of the Chemical Molecules 

 OF the Protoplasm with Reference to the 

 Theory of Heredity. 



1. Introduction 27 



2. Protoplasm and Protein 41 



3. Elsberg's Plastidules 44 



Chapter III. The Hypothetical Bearers of Specific Characters. 



4. Introduction 50 



5. Spencer's Physiological Units 51 



6. Weismann's Ancestral Plasms 53 



7. Nageli's Idioplasm 57 



8. General Considerations 59 



