A. O. POWYS 
257 
two tables are not necessarily the same, it will be noticed that there is but little 
difference in the numbers within the groups. It must also be noted that all the 
figures refer to age at first marriage, if more than one has been contracted. 
TABLE XVII. 
Age at Marriage 
Number of 
Deaths 
Total 
Children 
Average 
Children 
Average Life beyond 
Age 46 by Survivors 
of that Age 
Under £0 years 
1226 
9892 
8-06 
20-66 years 
20 and under 25 years 
1661 
11 402 
6-90 
20-70 „ 
25 „ 30 „ 
843 
4399 
5-22 
23-54 „ 
30 „ 35 „ 
326 
1096 
3-36 
23-44 „ 
35 „ 40 „ 
121 
253 
2-09 
25-20 „ 
40 „ 43 „ 
92 
60 
0-65 
TABLE XVIII. 
Age at 
Deaths after 
Total years 
lived after 
Age 46 
Mean Duration 
Age at 
Deaths after 
Total years 
lived after 
Age 46 
Mean Duration 
Marriage 
Age 46 
after Age 46 
Marriage 
Age 46 
after Age 46 
16 years 
57 
1277 
22-40 years 
28 years 
156 
3723 
23-87 years 
16 „ 
162 
3401 
20-99 „ 
29 „ 
93 
2013 
21-65 „ 
n „ 
238 
4795 
20-15 „ 
30 „ 
143 
3487 
24-39 „ 
18 „ 
399 
8203 
20-56 „ 
31 „ 
44 
902 
20-50 „ 
19 „ 
378 
7793 
20-62 „ 
32 „ 
56 
1383 
24-70 „ 
20 „ 
417 
8616 
20-66 „ 
33 „ 
42 
915 
21-79 „ 
21 „ 
395 
8246 
20-88 „ 
34 „ 
39 
907 
23-26 „ 
22 „ 
319 
6855 
21-49 „ 
35 „ 
38 
928 
24-42 „ 
23 „ 
272 
5224 
19-21 „ 
36 „ 
29 
760 
26-21 „ 
24 „ 
251 
5298 
21-11 „ 
37 „ 
24 
593 
24-71 „ 
25 „ 
269 
6339 
23-57 „ 
38 „ 
21 
514 
24-48 „ 
26 „ 
183 
4425 
24-18 „ 
39 „ 
10 
279 
27-90 „ 
27 „ 
132 
3107 
23-54 „ 
From the statistics contained in Table XVIII. the correlation between the 
age at marriage and the duration of life after age 46 was determined. The 
following were the constants : 
Mean Age at Marriage 22-6806 years 
Mean Duration of Life after Age 46 2 1 -.5942 „ 
1 1 • , • I Age at Marriage 4-8835 „ 
Standard Deviation -j,,'^ ^. „ , , 
(Duration of Life ]-(i004 
Correlation + -70679 ± -00523 
Coefficient of Regression + -23163 
Regression Straight Line (Origin at Age at Marriage 14 years. 
Unit of ic= 1 year), y = 19-5835 + -23163 x. 
Biometrika iv 33 
