Sugar Beets. 



103 



these in every 100 plants examined. Those with from 

 16-18% became the seed plants for the special race, the 

 so-called elite race from whose seeds the beets were 

 produced which would be tested in the next generation. 

 In 1892 there were among 180,000 polarizations only 

 four instances of a higher percentage than 18% in the 



lis n izs 13 13.S rt ;w is iss i6 res n ns ia las 19 

 Fig. 22. Variation in the Amount of Sugar in 40,000 Beets.^ 



above mentioned factory. Since that time the annual 

 number of polarizations as already mentioned has reached 

 about 300,000; and the maximum percentage has 



^ The polari^^ations in question were carried out from January 

 23 to February 5 in 1896 and gave the following figures: 



Sugar % . . . . 12 12.5 13 13.5 14 14. 5 15 15.5 

 . 340 635 1 192 2205 3597 5561 7178 7829 



. 16 16.5 17 17.5 18 18.5 19 

 . 6925 4458 2233 692 133 14 5 



Individuals with less than 12% have been excluded from this series. 

 The dotted line is the theoretical curve according to Quetelet's 

 law, {a-^-hy^ ; the discrepancy between it and the actual curve on the 

 left side is probably due to the presence of some faulty beets. 



Individuals 



Sugar % . 

 Individuals 



