138 



in this respect seems much greater and more persistent than in the out- 

 ward appearances of the plant. When the variety itself is not uniform, 

 and the variations due to mixed races are added to the variations of 

 individuals, the most remarkable extremes are produced. This can be 

 seen by examining the analyses of individual canes of crosses given in 

 the section on experiments with crosses, from which the following table 

 is selected, to illustrate the possible differences between different canes 

 growing in the same plot. The canes were selected from a plot of 

 Honduras, which showed fairly uniform character, in the endeavor to 

 obtain early ripened seed of that variety, and probably some were not 

 so well matured as others, though the seed from all was perfectly hard. 



Polarization of selected canes from Honduras. 



The following table shows the variation of individuals in a well- 

 established and uniform variety. They were selected with this end in 

 view from a remarkably uniform plot of Early Amber v and a particular 

 effort was made to have the canes as nearly of the same size and gen- 

 eral appearance, the same maturity, and the same conditions of growth 

 all taken from the same row. 



Polorization of average canes from Early Aml)er. 



While the difference is not so great as in the previous table, it will be 

 seen that there is a difference of nearly 6 per cent, of sucrose between 

 the richest and poorest canes in fifteen samples. 



Even in the highly improved and well established varieties of sugar- 

 beets this variation in the composition of individuals occurs, as will be 



