TABLE OF CONTENTS 



CHAPTER PAGE 



I. RECENT DEVELOPMENTS IN HEREDITY AND EVOLUTION: 

 GENERAL INTRODUCTION ..'..... 3 



II. THE PHYSICAL BASIS OF HEREDITY AND EVOLUTION 

 FROM THE CYTOLOGICAL STANDPOINT . . . . 22 



JOHN MERLE COULTER, Professor and Head of the 

 Department of Botany, the University of Chicago 



III. THE METHOD OF EVOLUTION 39 



IV. HEREDITY AND SEX 62 



WILLIAM ERNEST CASTLE, Professor of Zoology, Har- 

 vard University 



V. INHERITANCE IN THE HIGHER PLANTS .... 83 



VI. THE APPLICATION OF BIOLOGICAL PRINCIPLES TO PLANT 



BREEDING ; 113 



EDWARD MURRAY EAST, Assistant Professor of Experi- 

 mental Plant Morphology, Harvard University 



VII. RECENT ADVANCES AND THE PRESENT STATE OF KNOWL- 

 EDGE CONCERNING THE MODIFICATION OF THE GER- 

 MINAL CONSTITUTION OF ORGANISMS BY EXPERIMENTAL 



PROCESSES . 141 



WILLIAM LAWRENCE TOWER, Associate Professor of 

 Zoology, the University of Chicago 



VIII. THE INHERITANCE OF PHYSICAL AND MENTAL TRAITS 



OF MAN AND THEIR APPLICATION TO EUGENICS . . 269 



IX. THE GEOGRAPHY OF MAN IN RELATION TO EUGENICS . 289 



CHARLES BENEDICT DAVENPORT, Station for Experimen- 

 tal Evolution, Carnegie Institution of Washington 



INDEX 313 



