Ub., 1921] 



HARRIS AND OTHERS SEEDLINGS OF PHASEOLUS 



Mjure 1 6. Comparison of these figures with those in figure 15 shows essen- 

 rally the same type of distribution for the dimerous and trimerous plants, 

 he grades of the classes are merely about double what they were in the 

 ;rmer method of treatment. 

 The statistical constants are compared in table 10. 



#ypocoTYi OF urn 7s 



= I/ME nous 



= TfflMEROUS 



10 



FIG. 17. Percentage frequency distribution of total bundles in central region of 

 ypocotyl. 



For all five lines the constants show a higher mean number of bundles in 

 he trimerous than in the dimerous seedlings, the mean being approximately 

 2 in the former and 8 or 10 in the latter. Thus the trimerous seedlings 

 from 21.8 to 46.9 percent more bundles than the dimerous seedlings. 



