PARENT AND OFFSPRING a91 



tables, based upon ten years of experimentation with corn- 

 breeding, show that by constantly eliminating the undesired 

 variations and maintaining the desired ones it is possible to 

 accentuate certain characters. In studying the first of these 

 tables note the gradual increase of the percentage of protein 

 materials in one lot and the corresponding decrease in the 

 other lot. For feeding purposes the corn with the largest 

 amount of protein would be more valuable. 



TEN GENERATIONS OF CORN WHICH WAS BRED FOR INCREASE 

 AND DECREASE OF PROTEIN 



For the manufacture of corn oil it is desirable to secure 

 varieties of corn having a large proportion of oil. In the 

 table on page 392 it will be possible to note the gradual 

 separation of two races of corn which differ greatly in the 

 proportion of oil present, though all have descended from 

 the same original lot of corn. The figures at the^ top and in 

 the margins represent percentages of oil; those in the body 

 of the table indicate the number of ears of the indicated 

 composition. 



