CONTENTS 



PAGE 



AN INTRODUCTION TO A BIOLOGY . . , . 1 



APPENDIX TO AN INTRODUCTION TO A BIOLOGY: 



1. MENDELIAN PRACTICE IN THE LIGHT OJF 



BERGSON'S BIOLOGY . . . . . 90 



2. NOTES OF A LECTURE GIVEN IN JULY, 1914, 



AT THE GRADUATE SCHOOL or AGRICUL- 

 TURE, HELD AT THE UNIVERSITY OF MlS- 



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 



