154 TILLEES OF THE GEOUND CHAP. 



methods of plant-breeding. Some of these experi- 

 ments have had for their object the finding out of 

 facts which would be directly useful to the farmer, 

 others have been undertaken in order to learn more 

 about the nature of plants. 



G. 35. A Field of Giant Wheat in the New Mexico 

 Experimental Station. 



But we must not suppose that the latter are 

 really of less use than the former. It has happened 

 again and again that experiments which have been 

 undertaken merely to solve a point of scientific 

 interest have led to the discovery of facts of great 

 practical importance. In the long-run all knowledge 

 is useful, for experience shows that it is the people 



