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.