U. S. DEPARTMENT OE AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 191. 



B. T. GALLOWAY, Chief oj Bureau. 



THE VALUE OF FIRST-GENEKATION 

 HYBRIDS m CORN. 



BY 





G. N. COLLINS, 



Botanist, Crop Acclimatization and Adapta- 

 tion Investigations. 



Issued October 22, 1910. 



WASHINCITON; 



government printing office. 



1910. 



