]
Miss Gilmore further worked out the marriage rate of these normal school
girls, on the basis of the marks they obtained in their class work, and
found the results plotted in Fig. 33. It is evident that the most
intelligent girls, measured by their class standing, were preferred as
wives.
[Illustration: THE EFFECT OF LATE MARRIAGES
FIG. 35.--Given a population divided in two equal parts, one of
which produces a new generation every 25 years and the other every
33-1/3 years, the diagram shows that the former group will outnumber the
latter two to one, at the end of a century. The result illustrated is
actually taking place, in various groups of the population of the United
States. Largely for economic reasons, many superior people are
postponing the time of marriage. The diagram shows graphically how they
are losing ground, in comparison with other sections of the population
which marry only a few years earlier, on the average. It is assumed in
the diagram that the two groups contain equal numbers of the two sexes;
that all persons in each group marry; and that each couple produces four
children.]
It will be noted that these studies merely show that the brighter and
prettier girls were preferred by men as a class.
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