No. 577] SHORTER ARTICLES AND DISCUSSION 



45 



he may regard the numbers as measures (in units of intervals 

 between adjacent ovules) of the distance of ovules from the 



proximal end of the pod, and may then express in terms of corre- 

 lation the relationship between the weight of the seed and its 

 position in the pod. 



5 OVULES 6 OVULES 7 OVULES 



In doing this, the pods should of course be sorted into classes 

 according to the number of ovules which they produce and the 

 relationship computed for each group of pods separately, for 

 there is no reason for believing that the fourth in a pod with 4 

 ovules is comparable with the fourth seed in a pod with six. This 

 Weight of the Bean Seed. I. Intra-Ovarial Correlations," Beth. Bot. Cen- 

 tralbl. Alt., I, 81: 1-12, PI. 1-4, 1913. 



