CONTENTS. 



PART I. 



CHAP. PAGE 



I. General Eemarks on Causation i 



II. The Causation of Gross Material Effects — The Causation of Atomic 



and Molecular Effects 6 



III. The Causation of the Vital Changes of Protoplasm— Definition of 



Structure as applied to Living Matter — Proper Method of 

 Studying the Causation of Disease 1 1 



IV. The Environment — The Environment of Unicellular Organisms — 



The Internal-Cell-Environment of Multicellular Organisms — 

 The Primary Mai-Environment — The Secondary Mai-Environ- 

 ment — Remarks on the Nomenclature of Disease . . .17 



V. The External-Body-Environment — An Analysis of it — Its Divisions 

 into Organic, Inorganic, Mental, and Physical — The Distinc- 

 tion between a Diverse and Complex External-Environment — 

 Summary of this and the preceding Chapters .... 29 



VI. The Causation of Structure — The Two Great Causes of Structure : 



Heredity and Environment 36 



VII. The Causation of Structure {continued) — Heredity — Sexual and 

 Asexual Reproduction — Reproduction by Simple Division — 

 Parthenogenesis — Graft Hybridism — Partial Reproduction — 

 General Principles .40 



VIII. The Causation of Structure {continued) — Heredity — The Grand 



Rhythm of Life — Minor Vital Rhythms 49 



IX. Causation of Structure (continued) — Heredity at Corresponding 

 Ages — Heredity at Corresponding Seasons — Sexual Heredity 

 — Some Comparisons between Man and Woman 57 



