LUTHER BURBANK 



fornia today, as it is of the Gulf, States. In both 

 of these regions experimenters should take up the 

 work. It is at least possible that new and strange 

 citrus fruits may thus be brought into being. 



As a single hint suggestive of possibilities, let 

 me recall that the very earliest plum in existence 

 today is probably the one that I developed by 

 successive hybridizations which ultimately intro- 

 duced and blended the strains of six of the latest 

 plums. 



Possibly, then, the problem of developing an 

 orange resistant to cold — one that may be grown 

 not merely along the Gulf but along the Great 

 Lakes as well — may be solved in similar fashion. 

 It seems paradoxical to suggest that the blending 

 of oranges from half a dozen tropical and sub- 

 tropical climates — India, Arabia, Northern Africa, 

 Brazil, Florida, Southern California — ^might pro- 

 duce a fruit adapted to the climate of, let us say, 

 Missouri or Ohio; yet the case of my early plum, 

 descended from late ancestors, suggests that this 

 idea is not altogether chimerical. This work will 

 be greatly simplified by the fact that we now have 

 an orange, before mentioned, which, without 

 special selection for this purpose, is now hardy as 

 far north as Philadelphia. 



Other Sub-Tropical Fruits 



And a similar suggestion may be made regard- 



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