484 



The Ohio Naturalist. 



[Vol. XV, No. 6, 



order to determine both the nature and degree of such variations. 

 From plant 7 of the series 17-12-4 (F-3 generation) 58 fruits were 

 examined. The curve formed by these weights is shown in 

 Figure 1. The fruit-weights vary 2.35 grams. The mode is 

 shown to be less than the arithmetical mean and therefore the 

 skew is negative. 



AMffi 

 Grafns. 





Figure 2 



From plant 14 of the .scries 15-11-2 — II-II (F-2 generation) 

 28 fruits were harvested and the curve fonned by the weights of 

 these fruits is shown in P'^igurc 2. The fruit-weights vary 1.93 

 grams. As shown on tliis plate the mode is a little more than the 

 arithmetical mean and therefore the skew is slightly positive. 



