ct., 1921] HARRIS AND OTHERS PHASEOLUS VULGARIS 377 



TABLE i. 



Table 2 shows the average number of primary double bundles, inter- 

 alary bundles, and total bundles in the three types of seedlings, and gives 

 :he differences and probable errors of differences in the means upon which 

 ve must depend for conclusions. 



The entries in the first section of this table show that the average 

 lumber of primary double bundles is relatively lower in the hemitrimerous 

 :han in the trimerous seedlings. It is also relatively higher than the 

 lumber in the dimerous seedlings. The differences, while small, may 

 reasonably be considered significant in comparison with their probable 

 errors. The differences between the hemitrimerous and the dimerous class 

 are much larger than those between the hemitrimerous and the trimerous. 



Turning to the statistical constants for intercalary bundles set forth 

 in the second section of table 2, we note that in four of the five cases the 

 hemitrimerous seedlings have a larger number of intercalary bundles than 

 the trimerous seedlings. These differences are small, but may be significant. 

 In the one case in which the hemitrimerous seedlings have a smaller number 

 of intercalary bundles than the trimerous plantlets the difference is only 

 - o.oi 0.04. In two of the cases the hemitrimerous show a larger 

 number of intercalary bundles than the dimerous seedlings, but in three 

 lines the reverse is true. The differences are in general not so large in 

 comparison with their probable errors as in the case of the comparison for 

 number of primary double bundles. 



