D. Heron 
81 
TABLE I. 
Correlation of Sibships of Fatlier and Offspring. Whitney Data. 
Sex-Ratio of Offspring's Sibship. 
1 
1 
1 
1 
1 
1 
i 
1 
<^ 
1 
1 
0 
1 
Totals 
o 
C) 
9. 
to 
10 
■o 
'0 
00 
•00— -05 
■05— -15 
1 
1 
2 
■15— ■25 
1 
4 
0-5 
5 
5-5 
7 '5 
3-5 
2 
2 
31 
■25— ■SS 
1 
1 
6 
G-5 
16 
12-5 
5-5 
6 
7-5 
2 
64 
■35— ■iS 
2 
3 
14 
12 
28 
39 
30 
19 
11 
6 
6 
170 
■J,5— ^55 
2 
17 
23 
31 
50 
34 
27 
24 
4 
3 
215 
■55— ■GS 
6 
4 
23-5 
33-5 
40 
46 
41 
27 
35 
3 
7 
266 
■65— -75 
4 
6 
15-5 
18 
31 
40-5 
31 
29-25 
22-25 
3 
7 
207-5 
■75— ■SS 
1 
8 
9-5 
17 
19-5 
17 
10-75 
6-75 
7 
96-5 
■85— -95 
1 
1 
4-5 
7-5 
5 
11 
12 
11-5 
2-5 
3 
2 
61 
■95—1-on 
0-5 
4-5 
7 
8 
6 
6-5 
4-5 
2 
5 
44 
Totals 
14 
19 
93 
115 
181 
232 
185 
140-5 
115-5 
21 
41 
1157 
TABLE IL 
Correlation of Sibships of Mother and Off'spring. Whitney Data. 
Sex-Ratio of Offspring's Sibships. 
lO 
i 
>o 
11 
1 
10 
i 
10 
1 
>o 
1 
"p 
,1 
1 
1 
>o 
1 
0 
1 
Totals 
•O 
"P 
1-5 
j» 
lo 
^ 
■00— -05 
1-5 
0-5 
2 
1 
1 
0-5 
0-5 
7 
■05— ■IS 
2 
2 
4 
4 
5 
2 
3 
5 
2 
29 
■15— -25 
9 
13 
9-5 
18 
12 
8-5 
13 
1 
4-5 
88-5 
■25— ^35 
4 
1 
9-5 
11-5 
17-5 
36 
21 
18-5 
15 
2 
5-5 
141-5 
■35— ■!/> 
10 
3 
18-5 
21-5 
39 
54 
44 
27 
22 
6 
5 
250 
■1,5— -5J 
7 
1 
22-5 
21 -5 
23 
37 
44 
22 
23 
2 
9 
212 
■55— -C5 
5 
15-5 
17-5 
29 
36 
32 
23 
21 
1 
10 
190 
■65— -75 
1 
0-5 
3-25 
9-25 
16 
15 
12 
11-25 
4-25 
1-5 
4-5 
78-5 
-75— -85 
0-5 
2-25 
4-25 
6 
7 
5 
2-75 
4-75 
0-5 
0-5 
33-5 
■85— ■OS 
0-5 
1-5 
3 
3 
2 
10 
■95— 1-00 
Totals 
29 
6 
84-5 
104-5 
149 
212 
173 
118-5 
108-5 
^^1 
41 
1040 
03 
jn 
S 
-C 
-1-3 
o 
O 
_o 
I 
a> 
CO 
not a pi^iori seem justified in the present investigation, for one of the points 
involved is, admitting the average sex-ratio for the race to be not very far from -5, 
does this ratio vary significantly from individual family to individual family, as we 
should expect if it were inherited ? Thus, if we leave mother or father out in 
calculating the sex-ratio of their sibship, we may be diminishing or emphasising 
Biometrika v 11 
