t is impossible to obtain the actual masculinity ratio for the United
States, for the Census gives the statistics for only one year in ten
and even then is untrustworthy on this point. In a few states birth
registration is attempted but the figures thus obtained do not
harmonize with the Census and the situation is not greatly
improved.[38] The masculinity varies considerably in different parts
of the country, and is generally higher in states where the rural
population predominates. This fact agrees with European statistics
which almost universally show a high masculinity in rural districts.
Table XII, illustrates this point:

TABLE XII.
_Masculinity in Scotland_.[39]
-------------------------------------------------------
| | | | Mainland |Insular
Period. |Principal|Large |Small | rural | rural
| towns. |towns.|towns.|districts.|districts.
-------------------------------------------------------
1855-1861| -- | -- | -- | 105.6 | 106.6
1862-1871| -- | -- | -- | 105.9 | 105.6
1872-1881| 105.0 | 105.6| 106.1| 105.3 | 108.0
1882-1891| 105.1 | 105.6| 105.5| 105.5 | 108.7
1892-1901| 104.7 | 104.6| 104.9| 105.2 | 107.1
-------------------------------------------------------
Average | 104.9 | 105.3| 105.5| 105.5 | 107.2
-------------------------------------------------------

[Footnote 38: Massachusetts _Census_, 103.1; Reg. 1891-1900, 105.6.
Vermont _Census_, 108.1; Reg. 1890-1896, 105.9. Connecticut _Census_,
103.9; Reg. 1887-1891, 107.2. Rhode Island _Census_, 103.8; Reg.
1854-1901, 104.9.]

[Footnote 39: Lewis and Lewis, op. cit., p. 128.]

This would seem to bear out the theory that masculinity is affected by
consanguineous marriage, for consanguineous marriage is more frequent
in rural districts, and especially in insular rural districts. But
unless consanguineous marriages can directly be shown to produce an
excess of male births greater than the normal, such indirect evidence
is valueless.

In the genealogical material previously considered, we have a sampling
of the American population throughout its whole history, but the data
so far collected are insufficient for more than an indication of what
might be expected in further research along the same line. In the
following table as before, the figures compiled from printed
genealogies are separated from those obtained through correspondence