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Symbols (from p. 347):  squares represent males, circles, females; F, feeble-minded;  N, normal,  E, epileptic; I, insane, C, criminal; T, tuberculosis; d, inf, died in infancy; the hand shows the individual from whom the record was traced back; small black circle indicates miscarriage.

Source:  Michael F. Guyer. Being Well Born:  An Introduction to Heredity and Eugenics, p. 349.
                Indianapolis:  Bobbs Merrill, 1927.  University of Vermont Library Research Annex.