CONTENTS. ix 



Chief Divisions of the Four Principles — Continued. 



Modes of the Four Principles So 



Reflexive Mode of Influence Si 



Methods of the Reflexive Mode of each Principle 82-1 14 



The Forms of the Conjunctional Method 83 



.Sexual Form of Selection, Election, and Isolation 83 



Social Form of Selection, Election, Isolation, and Partition S4 



Filio-parental Form of Selection and Election 86 



Forms of the Dominational Method 86 



Forms of the Impregnational Method 87 



Dimensional Form of Impregnational Selection and of Isolation 88 



Structural Form of Impregnational Selection and of Isolation 88 



Potential Form of Selection and Isolation 89 



Fecundal Selection, Initial Fertility, and Final Fertility— Coordina- 

 tion is Secured by a Form of Filio-parental Selection — Some 



Domestic Fowls Illustrate Exaggerated Initial Fertility 90-92 



Fecundal Selection in Human Races — Loss of Fertility in the Poly- 

 nesian Race; not in the African Race 92 



Statistical Methods in the Study of Fertility — Karl Pearson on Fer- 

 tility in Man 92-95 



Importance of Impreguational Isolation 95-100 



Segregate Freedom from Competition and Segregate Escape from 



Enemies 101 



Computation of Ratio of Cross-breeds to Pure-breeds — A Parallel 



Financial Problem — Table from Formula (4) 103- 



Use of Tables 



Cumulative Segregation Resulting from Segregative Endowments. . 



Institutional and Prudential Selection 



Institutional Election, Isolation, and Partition 



Chapter VII. — Analysis of the Four Principles (Continued). 



Methods and Forms of Environal Mode of Each Principle 1 1 5— 



Environal Selection and Election 



Environal Isolation 



Industrial Isolation — Sustentational, Protectional, and Nidifiea- 



tional 119- 



Chronal Isolation — Cyclical and Seasonal 123- 



Spatial Isolation — Geographical and Local; Migrational, Transpor- 

 tational, and Geological 1 25- 



Fertilizational Isolation 



Artificial Isolation — Importance of Environal Isolation 



Environal Partition 



Regressive Mode of Each Principle 1 29- 



Reversal of Partition and Isolation in Man 



Isolation Prevents Reflexive Selection between Groups 



Discriminate and Indiscriminate Action of Principles 132- 



Discriminate Action 



Indiscriminate Action 



Contrasts in Their Action 



Table of Discriminate and Indiscriminate Modes of the Four 



Principles 1 36 



06 



07 

 08 



1 1 

 N 



29 



iS 



- 3 



28 

 28 

 29 



31 

 3<' 

 31 

 36 



$4 



