developed frora tripped flowers were distinguished Toy 

 marking the calyxes of the tripped flowers with carbon- 

 hlack. 



The ohject of this experiment was to illustrate the 

 results that might he ohtained "by tripping alfalfa flowers 

 in the field hy any mechanical arrangement that might he 

 devised to do this work. 



Tahle XVI. 

 Percentage of blowers Tripped hy Clasping Between the 

 Pages of a Book. 



Percentage of flowers tripped --47. 1 



Percentage of marked flowers producing 



pods-- 52.7 



Percentage of unmarked flowers producing 



pods ---4.8 



(41) 



