sterility.

In regard to relative fertility the figures are reliable, but they
fail to indicate any effect of consanguinity upon fertility, as will
be noted in Table XVII.

TABLE XVII.
-------------------------------------------------------------
|No. of | | Ave. to
|fertile | No. of | fertile
Parentage. |marriages.|children.|marriage.
-------------------------------------------------------------
First cousin. Gene. | 125 | 672 | 5.4
First cousin. Cor. | 150 | 759 | 5.1
Double cousins and uncle-niece| 9 | 39 | 4.3
Other consanguineous | 333 | 1605 | 4.8
Non-related | 676 | 3417 | 5.1
Ch. of 1st cousins | 294 | 1395 | 4.7
All consanguineous | 617 | 3075 | 5.0
All non-related | 970 | 4812 | 5.0
-------------------------------------------------------------

The report of Dr. Bemiss, and the report of the Ohio commission[47]
which he quotes, give the following figures:[48]

TABLE XVIII.
-------------------------------------------------------
| No. of | | Ave. to
| fertile | No. of | fertile
Parentage. |marriages.|children.|marriages.