FURTHER NOTES ON THE RELATIONSHIP 



BETWEEN THE WEICHT OF THE SUGAR 



BEET AND THE COMPOSITION OF 



ITS JUICE 



J. ARTHUR HARRIS and ROSS AIKEN GORTNER 



(Biochemical Laboratory of the Station for Experimental Evolution, 



Cold Spring Harhor, L. I.) 



(WITH PLATE 8) 



1. Introductory remarks. In an earlier paper^ we discussed 

 in terms of correlation and regression the relationship between the 

 weight of the sugar beet and the composition of its juice (total 

 soHds, sucrose and purity). At that time (October, 1912) we were 

 unaware of any previous attempt to deal with the problem by corre- 

 lation methods. It was with considerable pleasure, therefore, that 

 we found that only a few months before (January, 191 2) Andrlik, 

 Bartos and Urban^ had considered some of the same problems on 

 the basis of data derived from pedigreed strains, and had even gone 

 so f ar as to form correlation tables. They have not, however, calcu- 

 lated the constants which are essential to a füll understanding of 

 the tabled data. For this reason, and because their conclusions 

 differ from our own, we have thought it worth while to take up the 

 problem again. 



2. Analysis of data. Although they discuss six series, Andrlik, 

 Bartos and Urban give only one table from which a correlation 



1 Harris, J. Arthur and Ross Aiken Gortner ; On the relationship between 

 the weight of the sugar beet and the composition of its juice: Proc. Columbia 

 Biochem. Assoc, Biochemical Bulletin, 1913, ii, p. 287, and Journ. Industrial 

 and Engineering Chem., 1913, v, p. 192. 



2 Andrlik, K., V. Bartos and J. Urban ; Über die Variabilität des Gewichtes 

 und des Zuckergehaltes der Zuckerrübenwurzeln, und über die gegenseitigen 

 Beziehungen dieser beiden Merkmale: Zeitschr. f. Zuckerindustrie in Böhmen, 

 1912, xxxvi, p. 193. 



524 



