24.75 on an average to each kind, against the 3.37 of the
generality--that is, they are 7.3 times as numerous.

On this principle the expectation of noteworthiness in a kinsman of
an F.R.S. (or of other noteworthy person) is greater in the following
proportion than in one who has no such kinsman: If he be a father, 24
times as great; if a brother, 31 times; if a grandfather, 12 times;
if an uncle, 14 times; if a male first cousin, 7 times; if a
great-great-grandfather on the paternal line, 3½ times.

The reader may work out results for himself on other hypotheses as to
the percentage of noteworthiness among the generality. A considerably
larger proportion would be noteworthy in the higher classes of
society, but a far smaller one in the lower; it is to the bulk, say,
to three-quarters of them, that the 1 per cent. estimate applies, the
extreme variations from it tending to balance one another.

The figures on which the above calculations depend may each or all of
them be changed to any reasonable amount, without shaking the truth
of the great fact upon which Eugenics is based, that able fathers
produce able children in a much larger proportion than the
generality.

* * * * *

The parents of the 207 Fellows of the Royal Society occupy a wide
variety of social positions. A list is given in the Appendix of the
more or less noteworthy parents of those Fellows whose names occur in
the list of sixty-six families. The parents are classified according
to their pursuits. Many parents of the other Fellows in the 207