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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    2/ Table I. Age Periods. Father. Offspring. Mother. Offspring Under 20 years... 1*4 26‘2 o-6 27-8 20-24 ,, ... 0-4 18*0 3*4 *5*7 i ^ <L> 25-29 ,3 . 1*4 18*0 4*4 l8’2 o c TJ 0> 30-34 „ . 9-6 13*0 7*8 13*4 < ° 35-39 3, . 11'5 7*3 9*2 IO’O 40-44 3 3 9-2 6*4 10*3 5*8 45*49 33 . I4-3 6-o 12*0 0 7 i '-tr6 ^ 5 0 50-54 3 3 i7*5 0-9 12*3 24 £.2 S 55-59 ,3 . 13-8 3*7 i4'o j .* t-3 ^ P-< 60-64 ,, ... lO’I — 11-6 i*3 65-69 „ . 5*° — 8-8 — 70-74 4-6 0'4 3*i — 75-79 3, . 0'4 — i*3 — 80 ,, ... ... 0’4 — o’6 — This table is represented graphically in the subjoined Figs. 16 and 17, the abscissae representing the age periods and the ordinates the percentage of cases whose age at the time of first attack falls within the given periods. Figs. 16 & 17 represent diagrammatically the age incidence of first attack in parents and offspring. The first peak in the curve of the parent is due to the incidence of a larger number of cases of general paralysis in the male as compared with the female at this age period. It would be much more marked were it not for the fact that the cases of general paralysis among relatives are not numerous comparatively with other forms of insanity. This is as we should expect, for it is an acquired disease, and heredity plays a far less important part in its etiology than in the true insanities. It will be observed that the parent curves, male and female, attain their