ON THE ORIGIN OF NEW SPECIES 



undeviating patience, and cultivated eyes to 

 detect variations of values." 



The production of these three new and 

 valuable species of fruits is not only of great 

 interest and large economic value, but it opens 

 the way to an indefinite extension. Here, as 

 in many other lines, much work remains to be 

 done by other hands. Within certain limita- 

 tions there remain vast opportunities for the 

 production of other fruits, of grains and grasses 

 and trees and all manner of plant life now 

 unknown to the world. Not only is novelty 

 to be looked for, but important additions to 

 man's resources. If a combination of certain 

 grains, for example, could be made producing 

 a wholly new grain of augmented food supply 

 and productivity, the importance of the 

 product to the world would be beyond 

 estimate. 



Such creations as these Mr. Burbank has 

 effected, with many other improvements upon 

 old forms of plant life, establish anew the fact 

 that the time which has been predicted by 

 some pessimistic theorists, when there will be 

 too many people on the globe for the produc- 

 tivity of the earth, must be set forward so 



217 



