plant as a basis of comparison, the insect pollinated 

 series gave 29.7 seeds per each ten gramms of plant 

 weight while the hand pollinated section produced slightly- 

 less, - 25.9 seeds per 10 gramms of weight of the plant. 

 Seven different alfalfa plants were inclosed with- 

 in wire netting cages; the numher of seeds which developed 

 while the plants were inclosed under netting were later 

 counted. The results obtained are given in the following 

 table. The flowers were artificially tripped. 



Roberts and Freeman describe a method of exploding 

 flowers in large numbers by rolling the head carefully 

 but firmly between the thumlb and the first and second 

 fingers. 



Medicago Flowers Tripping Historical Resume' 



(Circ. 24, B.P.I. U.S. Dept; of Agri . C.J. Brand & 

 J.M. West gate, March 5, 1909.) 



A very brief discussion of the relation of insects 



to the setting of alfalfa seeds is given in this bulletin. 



(71) 



