306 LUTHER BURBANK 



"When man takes advantage of these facts, 

 and changes all the conditions, giving abundance 

 of room for expansion and growth, extra culti- 

 vation and a superabundance of the various 

 chemical elements in the most assimilable form, 

 with abundance of light and heat, great changes 

 sooner or later occur according to the suscepti- 

 bility of the subject; and when, added to all these 

 combined governing forces, we employ the other 

 potent forces of combination and selection of the 

 best combinations, the power to improve our use- 

 ful and ornamental plants is limitless." 



TEN YEARS OF PROGRESS 



In describing this work, Professor de Vries 

 has said that my catalogue of 1893, the contents 

 of which have just been summarized, gained for 

 its author "a world- wide reputation and brought 

 him into connection with almost all of the larger 

 horticultural firms on the earth." 



These catalogues were largely bought up by 

 the United States Experiment Stations and 

 various American and European universities to 

 be used as textbooks. 



It would be superfluous to recapitulate in de- 

 tail the plant developments that have occupied 

 attention at Santa Rosa and Sebastopol in the 

 more recent years. 



