LUTHER BURBANK 



in our day what is doubtless the greatest migration 

 in all history. The races of Europe are flooding 

 into America, and there is a more pronounced 

 commingling of racial strains now taking place 

 on our soil, than perhaps ever occurred in any 

 one place, or in any single epoch, in the history 

 of the world. 



America owes its present greatness in consid- 

 erable measure to the mingling of moderately 

 divergent strains in the past; but this fact should 

 not blind us to the menace that lies in the 

 mingling of races that are too divergent to blend 

 advantageously. 



And it is at least an open question whether 

 certain of the Latins, the varied races of Slavs, 

 and the vast hordes of Semites that have come 

 to us in recent years can mingle their racial strains 

 with the Anglo-Saxon stock without disadvantage 

 to the ultimate progeny. 



It is this thought that I would put forward as 

 the most important suggestion that arises from 

 the study of the hybridizing experiments in which 

 I unsuccessfully attempted to blend the hereditary 

 tendencies of certain races of plants that were too 

 widely divergent. 



[End of Volume II] 



