60 LUTHER BURBANK 



ation and their decisions will determine how the 

 hereditary factors shall be combined in building 

 the new organism. 



Suppose, now, that the particular case that 

 is before us is that which arises when some 

 colossal plant developer with his crude manipu- 

 lations has succeeded in transferring a pollen 

 grain of a thorny bramble that bears white 

 berries to the pistil of a thornless bramble that 

 bears black berries, and that the respective nuclei 

 of pollen grain and ovule have come together. 



The elfin architects compare notes, inspect 

 their respective blue prints and charts and tables 

 of specifications, and set to work. For a time 

 they get on very well. There are factors for 

 general size and foliage and form of plant; for 

 time of flowering and appearance of flower cells ; 

 for root system and shape of leaf and shape of 

 future fruit, and a multitude of other details in 

 regard to which there is perfect agreement. In 

 all these cases the factor that A represents fits 

 perfectly into the factor that B represents, and 

 the work of building the future plant goes on 

 apace. 



But presently, as they have built upward from 

 the root and outward from the center, they come 

 to the specifications for texture of stem. 



And here at once there is disagreement. 



