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[56] Lancet, 1922, i. 874.
[57] On the Handicapping of the First-Born, Eugenics Lecture Series, x., 1914.
[58] Noirot, L., L’Art de vivre longtemps, p. 195, 1868, Dijon.
[59] Laurent, O., Bull. Acad. de méd., Paris, 1919, lxxxi. 835.
[60] Annuaire internationale de statistique, Part II., Europe, Movement of the Population, Table 12, pp. 180–81.
[61] Statistiska Meddelanden, Ser. A., Band I. 1 Dödlighets- och Lifslangdstabeller for Åren 1816–1910 af Kungl. Statistiska Centralbyrån, Stockholm, 1912, p. 28. (For this reference I am indebted to Dr. Major Greenwood.)
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[64] Easton, J., Human Longevity, p. xxvi, Salisbury, 1799.