470 



Plant Physiology 



period have been reported. A white dent corn was used, 

 and to this the name Illinois has been given. In protein 

 content the 100 ears of seed corn used the first year varied 

 from 13.87 to 8.25 per cent. From the table in the note 

 below : it will be seen that the ten years of selection sufficed 

 to bring the average of the plat (1906) in high protein 

 (14.26 % ) above the best ear in the first crop (13.87 % ), and 

 the average in the low-protein plat (8.64 % ) was practi- 

 cally as low as the lowest ear (8.25%). The yearly 

 averages in the high-oil and low-oil breeding show a varia- 

 tion often more striking than in the case just cited, as 

 shown in the footnote. 



1 TEN GENERATIONS OF BREEDING CORN FOR INCREASE AND DECREASE 



OF PROTEIN 



The relatively high protein content in the product harvested in 1901 is 

 evidently the result of early maturity of the seed during that remarkably 

 dry season. 



