ARTTFTCIAL POLLINATION IX COHN. 



to allow for the elongation of the stalk above the ear. Unless guarded 

 anainst, this elongation will break the stalk at the base of (lie tassel 

 and then push through the paper, making an opening where foreig-n 

 pollen can enter. To prevent this breaking of the tube, two extra 



I'k;. 1. — Corn plnnt. showins motliorl of u«inK pnper tube to insure self-pollinntion. 



folds are taken where the paper is cemented, making a strip an inch 

 or so wide composed of four thicknesses of paper. In adjusting the 

 tubes this strip is placed on the upper side, causing the tube to form 

 an even curve instead of bending sharply at one point. 



[Cir. Sft] 



