TABLE IV.
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|_Ratio per 10,000 Marriages_.
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Country. | Rural.| Urban. | General.
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England | 79 | 71 | 75
France | 130 | 115 | 126
Alsace | 121 | 41 | 107
Norway[A] (Uchermann)| 810 | 260 | 690
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[A] Includes second cousins.

In regard to the degree of consanguinity, it seems very probable that
in the French, German, Italian, and English statistics and estimates
few if any marriages beyond the degree of first cousins are returned
as consanguineous, so in order to compare the Norwegian figures with
the others they should probably be reduced by one half. Out of 1549
consanguineous marriages contracted in Prussia in 1889, 1422 were
between "cousins" (probably first), 110 between uncles and nieces, and
16 between nephews and aunts.[20] The ratio of such marriages to
10,000 in France during the fifteen years ending in 1875 was:[21]

TABLE V.
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Degree. | Urban.| Rural.| All France.
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Nephew and aunt | 1.6 | 2.4 | 2.1
Uncle and niece | 6.0 | 5.6 | 5.8