David Starr Jordan 



ening the roots. Grafting a Japanese pear on the 

 Bartlett pear will give the latter new life through 

 the increase in the foliage, which gives material 

 for root action and further extension." 



As illustrations of the results of crossing and 

 hybridization, the following notes were taken on 

 plants in Mr. Burbank's gardens: 



In the beginning of his work Mr. Burbank 

 crossed all sorts of beans and had a half acre of 

 them. Some climbed to the height of twenty or 

 thirty feet, producing all sorts of pods — some with 

 pods long and slender and stems so short that the 

 pods doubled up on the ground. These forms 

 could have been fixed in time, though the varia- 

 tions were unusually persistent and very amazing 

 in their variety and abundance. 



Crossing the red and white pole bean, two or 

 three of the beans grew large and bore striped 

 pods, the beans themselves being jet black. From 

 this cross many varieties were developed having all 

 the colors known in beans. 



The results of selection are often so simple as 



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