Heredity and eugenics in relation to insanity / by F.W. Mott.

  • Mott, F. W. (Frederick Walker), 1853-1926.
Date:
[1912]
Catalogue details

Licence: In copyright

Credit: Heredity and eugenics in relation to insanity / by F.W. Mott. Source: Wellcome Collection.

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    Fig. io.—A pedigree showing pauperism, insanity (black half circles), and blindness in four generations (Lidbetter.) Fig. io Figs, ii, 12, and 13.—Three pedigrees to illustrate 11 antedating ”; the onset of insanity in the offspring is shown to occur at a much earlier age than in the parents. These pedigrees also illustrate extreme cases of hereditary transmission of the neuropathic taint; as a rule not more than one insane offspring of an insane parent occurs in four or five. The occurrence of in¬ sanity in all the children is probably due to the fact that there is a double insane inheritance in all these instances, although it is only shown in one completely, and one partially. Fig. 14. Two total abstainers, but born of drunken parents (circles with cross and with direct and collateral insanity in stocks (black figures), give birth to eight children, the first two are healthy and grown up, the second with numerous children; then come two children (shaded circles) dying in early life, followed by a son and two daughters (black figures) all suffering from dementia of adolescence, and lastly a healthy daughter with children. What we want to know is this : have all the unsound elements been segregated out ? This can only be ascertained by following up the children of the sound or apparently sound members.