20 N. H. EXPERIMENT STATION [Bulletin 174 



Bulletin No. 170, Maryland Experiment Station, College 

 Park, Md. 



Bulletin No. 127, Minnesota Experiment Station, St. Paul, 



Minn. 



Bulletin No. 312, Cornell University, Ithaca, N. Y. 



Extension Bulletin Nos. 24 and 39, University of Minnesota, 

 St. Paul, Minn. 



Official Inspection No. 46, Maine Experiment Station, Orono, 

 Me. 



