248 



BOTANICAL GAZETTE 



[march 



It is seen that the gain of weight of seeds for pods with aborts 



over corresponding seeds in pods without aborts is greatest in 



2-ovuled pods and least in 3-ovuled pods. It is further shown that 



the weight is most augmented in the tip position in all types of pods, 



and least in the position next above the base in 3-ovuled and 



4-ovuled pods. 



TABLE VIII 



Percentage of abortiveness for each position of seeds in pod 



Table VIII shows that the abortiveness for each of the 9 rows is 

 less in the first than in the second harvest. When the two harvests 

 are combined, the range is from 18.25 to 22,35 P^^ cent. It is 

 further deduced that the average for the middle seeds (19.05 per 

 cent) is the lowest, while the tip seeds yielded the highest (21.58 

 per cent) average abortiveness. From the standpoint of percentage 

 of good seeds per pod, the middle seeds are the best for good crop 

 productions. 



TABLE IX 

 Percentage of abortiveness for each pod position in whole crop 



Table IX shows that when the two harvests are combined the 

 abortiveness is chiefly in the lower portion of the pod and is very 

 large in the basal position. In all types of pods there is a regular 

 decrease in the number of aborts from the base to the tip, with the 



