Ernest Warren 
121 
daring the different self-fertilised generations. Inspection of the tables shows 
that the distributions of the various families give no indication whatever of the 
occurrence of segregation into little spotted and much spotted plants. The 
gradual rise in the degree of spotting of the different parents is followed by a 
gradual increase in the spotting of the respective families obtained by self- 
fertilisation. The fact that the correlation between the grandparents and grand- 
children is less than that between the parents and offspring is further evidence 
that the small, apparently fortuitous, variations in spotting occurring among self- 
fertilised generations are inherited. This result is opposed to the pure-line 
hypothesis, according to which such small variations are regarded as slightly 
different expressions of the same identical character which remains unchanged in 
its essence from one self-fertilised generation to another. If such were the case 
Correlation Table — Spotting— Parents and Offspring. Series II and III. 
Offspring. Grades of Spotting. 
Parents. 
Grades 
of 
Spotting 
Co 
I 
-Is- 
1 
I 
1 
to 
j 
! 
1 
16—19 
r 
1 
T 
f' 
Od 
Totals 
0— 
1 
6 
8 
15 
2 
7 
1 
10 
8—11 
_ 
2 
2 
18 
18 
17 
10 
1 
68 
13—15 
1 
8 
28 
40 
68 
19 
5 
2 
171 
16—19 
1 
1 
5 
14 
10 
28 
34 
33 
49 
20 
1 
] 96 
30—3.-1 
2 
3 
5 
4 
9 
16 
25 
26 
25 
17 
3 
1 
136 
34—37 
2 
5 
6 
3 
8 
15 
14 
10 
3 
1 
67 
38—31 
1 
3 
3 
6 
10 
9 
4 
10 
2 
2 
50 
33—35 
0 
36—39 
0 
0 
U—Jt7 
2 
1 
' ~ 
3 
Totals 
2 
9 
14 
19 
32 
45 
87 
108 
138 
165 
69 
25 
3 
716 
Correlation Table — Spotting — Grandparents and Grandchildren. 
Series II and III. 
Grandchildren. Grades of Spotting. 
Grand- 
is 
(a 
parents. 
to 
to 
Totals 
Grades of 
1 
T 
r 
t 
1 
f 
1 
1 
f 
Spotting 
to 
to 
8—11 
1 
4 
2 
6 
8 
19 
35 
19 
5 
2 
101 
12—15 
1 
1 
2 
5 
4 
17 
21 
20 
31 
10 
12 
124 
16—19 
2 
3 
6 
12 
9 
20 
22 
2.5 
37 
15 
2 
1 
154 
20—33 
2 
4 
1 
1 
4 
7 
9 
15 
13 
3 
1 
60 
24—27 
1 
6 
4 
7 
8 
0 
4 
30 
28—31 
2 
3 
1 
4 
7 
8 
6 
8 
1 
40 
Totals 
7 
12 
17 
30 
33 
66 
66 
91 
117 
47 
20 
3 
509 
