It is commonly thought that marriage of first cousins is bad for the health of their descendants. On the other hand, students of Eugenics are convinced from the study of such cases that these marriages are not necessarily bad, except when they tend to intensify certain bad traits that may happen to be dominant in both of the persons intermarrying. Dr. Douglas P. Murphy, of Rutherforton, N. C, now describes a case of a family whose earliest known member from Germany settled in Pennsylvania in 1731. His descendants have remained to a...
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