U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 191. 



B. T. GALLOWAY, Chief of Bureau. 



THE VALUE OF FIRST-GENERATION 

 HYBRIDS IN CORN. 



BY 



G. N. COLLINS, 



Botanist, Crop Acclimatization and Adapta- 

 tion Investigations. 



Issued October 22, 1910. 



WASHINGTON; 



GOVERNMENT PRINTING OFFICE. 

 1910. 



