258 
Age at Marriage and Duration of Life 
The statistics and regression straight lines are shown on Fig. 8. 
The correlation is high and within very small limits of probable error, and 
we are therefore justified in concluding that early marriage, whether in consequence 
of generally larger families (see Section A) or in consequence of immature develop- 
ment, is distinctly prejudicial to longevity beyond the reproductive period. If 
any weight is to be attached to the results of the comparatively meagre ob- 
servations of the marriages contracted between ages 35 and 40, we would be 
Fig. 8. Age at Marriage and Duration of Life beyond Age 46 by Survivors of that Age. 
Females. 
Q 15 
14 ■ ■■ 
13 
12 
11 
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 
Age at Marriage. 
Equations to Eegression Straight Lines : 
aa' (Origin at 14 years of Age. Unit ot x = l year) 
2/ = 19-5835 + -231630;. 
bb' (Origin at 14 years of Age. Unit of .r = 1 year) 
y = 20-8118--0228.T. 
cc' (Origin at 24 years of Age. Unit of x=l year) 
(/ = 23-4057 + -05629.r. 
further justified in concluding that the longer man-iage is deferred the greater 
the probable lifetime after the reproductive period is passed. If, however, we 
examine Fig. 8, we see that the statistics divide into two fairly well defined 
sections, viz. from age 15 at marriage to age 24, and from age 25 upwards. The 
dividing age (24—25) is remarkable as that found to be that of maximum initial 
