324 



THE AMERICAN NATURALIST 



[Vol. XLVI 



the D and H conditions upon the offspring should not 

 be made on either of these fields. 8 



Three fields 9 under control of the Station for Experi- 

 mental Evolution at Cold Spring Harbor were chosen 

 for the comparison. All the Navy series were tested 



on one field and all the Ne Plus Ultra and White Flageo- 

 let on another. The third field was devoted to the 



* A number of breeders hold that among plants there is a gradual adap- 

 tation to the substratum; that when plants are transferred from one locus 

 to another there is a "new place effect." ~ti, now, the series grown on 

 the starvation field for two years should from some such process of adap- 

 tation be better able to thrive under these conditions than a series newly 

 transferred there from a rich soil, or vice versa, the comparison would be an 



The facts bearing upon this point derivable from our material will 



• Three were selected because accidents of season and culture do occur 



