374 
FREDERICK J. PRITCHARD 
lation. Both the frequency distribution and the relative behavior of 
the types are shown in the following tables. 
Table XVI 
Frequency Distribution of Beets Arranged According to Percentage of Sugar in the Beet 
>. 
0 
0 
0 
On 
as 
0 
o 
0 
o 
0 
No. of 
Plants 
Mean 
Standard 
Deviation 
A 
1 
I 
I 
2 
3 
5 
9 
12 
12 
6 
II 
5 
6 
4 
2 
8o 
17. 07 =b. II 
i.48=t.o8 
B 
3 
I 
3 
8 
6 
13 
II 
10 
5 
6 
2 
3 
I 
86 
i7.63i.II 
i.44=t.07 
C 
2 
4 
3 
9 
II 
II 
12 
13 
7 8 
4 
I 
2 
I 
88 
17.93^-10 
i.40=t.07 
Table XVII 
Frequency Distribution of Beets Arranged According to Quantity of Sugar per Root in Grams 
Type 
0 
TO 
On 
On 
8 
0 
0 
0^ 
0 
0 
No. of 
Plants 
Mean 
Standard 
Deviation 
A . 
I 
I 
I 
2 
05 
7 
8 
7 
9 
10 
7 
2 
5 
5 
0 
3 
I 
I 
I 
I 
I 
I 
I 
80 
74.68ztl.75 
23.l8il.24 
B . 
I 
0 
0 2 
5 
5 
9 
8 
5 
4 
6 
5 
7 
10 
3 
I 
0 
3 
0 
3 
0 
I 
86 
87.26dbl.76 
24.22il.25 
C. 
3 
42 
2 
5 
7 
4 
9 
II 
7 
7 
3 
3 
2 
3 
2 
88 
85.5iil.57 
2i.88ii.ii 
The number of individuals in each group is not large but the 
distributions are fairly regular. While the types do not differ much 
in behavior, B and C exceed A by several times the probable error 
both in percentage and quantity of sugar per root. If wrinkled leaf 
surface and shallow petiole groove had been included in Type A the 
contrast between it and the other types might have been still greater. 
It is possible that if certain other characters as number of woodrings, 
size, shape and number of bundles within the woodring, number of 
leaf-circles (spiral turns), total number of leaves, and character of 
veining had been included in the investigation, greater differences 
would have been exhibited between types. 
Summary 
A statistical study of 3,784 individual sugar-beet plants grown at 
Brookings, S. D., was made to determine the correlations which exist 
between certain morphological characters of the plant and the per- 
centage and quantity of sugar in its root. Data collected at Fair- 
field, Washington, were also used ixi studying the relationship between 
weight of root and percentage of sugar, but no data from different 
