BOTANY AND VARIETIES 29 



several seasons within the past fifteen years when the 

 growing period covered only one hundred and thirty to 

 one hundred and thirty-five days. From these facts it 

 will be seen that only a comparatively few varieties of 

 dent com are adapted to New England conditions. 



Eastern Corn Varies Greatly in Composition — 

 Analyses of a large number of varieties grown in the 



Pie 10— Kernel Indentation, Boone County Wliite 



No 324, smooth grains; 325, medium rough; 326, rough grains 



east show a wide variation in the composition of corn. 

 For example, out of ninety varieties analyzed by the 

 Connecticut experiment station, the highest percentage 

 of protein in the dry substance of the grain of any 

 variety was 14.53 per cent, while the variety showing 

 the lowest proportion contained 8.33 per cent. It has 

 been found, too, that the percentage of protein varies 



