Contents 



PAGE 



An Introduction to a Biology .... 1 



Appendix to An Introduction to a Biology: 



1. Mendelian Practice in the Light of 



Bergson's Biology .... 90 



2. Notes of a Lecture given in July, 1914, 



AT THE Graduate School of Agricul- 

 ture, HELD at the University of Mis- 

 souri, Columbia, Missouri . . . 100 



3. Correspondence with M. Bergson . . 103 



4. Notes and Extracts .... 104 



On the Bearing of Mendelian Principles of 

 Heredity on Current Theories of the Origin 

 OF Species ....... 127 



On the Supposed Antagonism of Mendelian to 



BioMETRic Theories of Heredity . . . 144 



The Laying Bare of the Marvel — A Legend . 162 



On the Difference between Physiological and 



Statistical Laws of Heredity . . .167 



Recent Advances in Animal Breeding and their 



Bearing on our Knowledge of Heredity . 207 



.^3 



. ? V 



