128 STATE BOARD OF AGRICULTURE. 



On Jnly 10th two more bumble bees were introduced and seen to work, and 

 on July IJJtli more bumble bees were introduced, and were seen to work on the 

 flowers. 



On July 31st 50 ripe heads were selected from each plant, and the seeds 

 carefully shelled and counted. The 50 heads on the plant where the bumble 

 bees were excluded yielded seeds as follows : 



40 heads yi^^lded seeds _ _ _ 



6 heads yielded one each. ^ (> 



1 head "' " 2 



1 head " __. 3 



1 head " _ _ 5 



1 head '' 9 



Total... - 25 



The 50 heads on the plant where the bumble bees were inserted and seen to 

 work under the netting, yielded seeds as follows : 



29 heads yielded seeds 



2 heads " one each _ 2 



5 heads '•' two " .-_ 10 



3 heads " three " 9 



3 heads " four " .12 



3 heads " five " ^ 15 



1 head " seven " 7 



1 head " eight " 8 



1 head " nine " _ 9 



1 head " ten " 10 



1 head '' twelve" 12 



Total - -. 94 



On Sept. 13th, 1S82, I selected of the second crop of red clover five plants 

 within ten feet of each other, which seemed to be much alike. They had not 

 been covered or marked in any way. The seeds of 50 good heads of eacli plant 

 were shelled out with the following results: 1,260, 1,275, 1,460, 1,485, 1,820. 

 It will be seen that 50 heads from plant number five contained about one- 

 third more seeds than 50 heads from plant number one. 



In another place, 50 heads selected from one ])lant yielded 2,290 seeds, 

 nearly twice as much as plant number one in the first lot. 



From the last experiments we ought to learji a lesson in reference to draw- 

 ing hasty conclusions from a few isolated cases. 



In the spring of 1882 a student covered eight young heads of white clover 

 with paper sacks. The sacks were tied up to stakes to keep the clover heads 

 in a natural position. Eight similar uncovered heads near by were marked at 

 the same time. Of the heads covered 



5 yielded seeds 



1 " seed - -- 1 



1 *■' seed 1 



1 " seeds.. 3 



Total 5 



