Note 20 — Front matter

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.