CONTENTS 



PAGE 



A Word to the Reader. Luther Bur- 

 bank 17 



Prefatory Note. David Starr Jordan . 21 



Fundamental Principles of Plant 



Breeding 37 



Evolution and Variation with the 



Fundamental Significance of Sex 53 



How Plants Adapt Themselves to 



Conditions 69 



Twenty-Three Potato Seeds and What 



They Taught 93 



No Two Living Things Exactly 



Alike 117 



The Rivalry of Plants to Please Us 147 



Let Us Now Produce Some New Colors 



in Flowers ....... 175 



15 



