It is of course impossible to explain all the ratios in this table.
Much variation is here due to chance, and a few additional cases might
appreciably change any of the ratios. It will be noticed, however,
that the two categories whose masculinity is most similar (100 and
101), are derived from cases taken from the same families and from the
same environment, and differing only in that the first is closely
consanguineous while the second is not. The third and fourth groups,
separated from the first two by at least a generation, and probably
living in a different environment, differ greatly in masculinity from
them. In the fourth group are included 1-1/2, second, third, and a few
even more distant cousins, all more distantly related than first
cousins, and taken from the same genealogies as these; yet the
masculinity is much greater.

An analysis of the cases collected fifty years ago by Dr. Bemiss, of
course without thought of masculinity, gives the following result:[40]

TABLE XIV.
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| Sex of Children. |
|----------------------|
Marriage. |Number.| Male.|Female.|Masculinity.
----------------------------------------------------------
1st cousins and nearer| 709 | 1245 | 1171 | 106.3
2d and 3rd cousins | 124 | 264 | 240 | 110.0
All consanguineous | 833 | 1509 | 1411 | 106.9
Unrelated | 125 | 444 | 380 | 116.9
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