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Start Over You searched for: Subjects Biological Phenomena Remove constraint Subjects: Biological Phenomena Dates by Range 1850-1899 Remove constraint Dates by Range: 1850-1899

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2. On the physical basis of life

7. Intermarriage, or, The mode in which, and the causes why, beauty, health and intellect result from certain unions, and deformity, disease and insanity from others : demonstrated by delineations of the structure and forms and descriptions of the functions and capacities, which each parent, in every pair, bestows on children : in conformity with certain natural laws, and by an account of corresponding effects in the breeding of animals