464 THE AMERICAN NATURALIST [Vol. XL VIII 



the average yield of the selected varieties, is shown in 

 Table IV. The average yield in bushels of the Haynes 

 Blue Stem is also platted in comparison with the average 

 yield of the selected varieties in Plate II. In 1912 a 

 severe hail storm injured the variety plats so much that 































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Plate II. Comparing seasonal fluctuations in selected lines with unse- 

 lected Blue Stem. Solid line, yield per plant in grams for selected lines; 



it was thought best not to include the yield of the Haynes 

 Blue Stem for that year. This gives an incorrect appear- 

 ance to the curve, as it was extended just as if this year 

 was present and midway between 1911 and 1913 in yield. 

 It will be noticed from Table IV and Plate II that the 



TABLE IV 



Comparing Seasonal Fluctuations in Selected Lines with Unselected 

 Yield in grs. per I 



