BOTANY AND VARIETIES 



II 



PHYSICAL CHARACTERISTICS 



What is true of the chemical composition is emi- 

 nently true of the physical characteristics of the ears 

 or the stalks. For instance, the shape of the Learning 

 kernel has been changed by twenty-five years of selec- 

 tion, from the original shoe-peg type to a broader and 

 deeper kernel with a deeper dent. Along with this 



333 



334 



335 



Fig 3— Uniform Sample of Boone County White 



^° 333» to ° short for circumfeience; 334, nearly correct length and circum- 

 ference; 335, immature 



variation in the shape of the kernel has gone an in- 

 crease in length of ear and a slight increase in circum- 

 ference. Again, in the case of the Boone County 

 White variety the tips of the original corn were poorly 



