It is unnecessary to touch here on the question of infant mortality, which has already been referred to, and will again come in for consideration in a later chapter. It need only be said that a high birth-rate is inextricably combined with a high death-rate. The European countries with the highest birth-rates are, in descending order: Russia, Bulgaria, Roumania, Servia, and Hungary. The European countries with the highest death-rates are, in descending order, almost the same: Russia, Hungary, Spain, Bulgaria, and Servia, It is the same outside Europe. Thus Chile, with a birth-rate which comes next after Roumania, has a death-rate that is only second to Russia.

Nyström (La Vie Sexuelle, 1910, p. 248) believes that "the time is coming when it will be considered the duty of municipal authorities, if they have found by experience or have reason to suspect that children will be thrown upon the parish, to instruct parents in methods of preventive conception."

The directly unfavourable influences on the child of too short an interval between its birth and that of the previous child has been shown, for instance, by Dr. R.J. Ewart ("The Influence of Parental Age on Offspring," Eugenics Review, October, 1911). He has found at Middlesbrough that children born at an interval of less than two years after the birth of the previous child still show at the age of six a notable deficiency in height, weight, and intelligence, when compared with children born after a longer interval, or with first-born children.

Tatler, Vol. II, No. 175, 1709.