Figure C 127, "Decrease of Legitimate Fertility in Berlin—the two-children system." The other German towns follow the example of Berlin. Berlin to-day produces 20% less children than are required to maintain its own population without immigration, and the same conditions will soon prevail in other towns. Up to now the country districts in general maintain their fertility (West Prussia on Figure C 128), but there, too, modern practices begin to make themselves felt. The town and industrial population increases so rapidly that the conditions prevailing among them have an ever increasing effect on the people as a whole. Thus we see, even at the present time, a serious decline in fertility among an overwhelming majority of European States: Figure C 129, "Decrease of Fertility in Some European States."
Exhibited by David Fairchild Weeks, M.D.,
Director of the New Jersey State Village for Epileptics at Skillman, U.S.A.
Explanation of Symbols used in the Charts.
Male individuals are indicated by squares and females by circles. The members of each fraternity are connected by the same horizontal line. The fraternity line is connected by a vertical line to the line joining the symbols representing the father and mother. Illegal unions and illegitimate children are shown by dotted lines. As an aid in tracing the patient's immediate family, a green line is used to connect the direct ancestors on the paternal side, and a red line on the maternal side. The red squares and circles indicate epileptics, the green the insane, the black the feeble-minded, and purple the criminalistic. The figures directly above the fraternity line indicate the rank in birth, a figure inside a square or circle shows the number of individuals of that sex. A black dot suspended from the fraternity line stands for a miscarriage or a stillbirth. A line underneath a square or circle shows that institutional care has been received. The hand points out our patient.
The following letters indicate the different conditions: A, alcoholic; B, blind; C, criminalistic; D, deaf; E, epileptic; F, feeble-minded; I, insane; M, migrainous; N, normal; P, paralytic; S, syphilitic; T, tubercular; W, wanderer, tramp; d, died; b, born; inf, infancy; Sx, unchaste.