Note 129 — Front matter (continued 3)
Reading edition
It may suffice to take a single point. Large families involve the birth of children at very short intervals. It has been clearly shown by Dr. R.J. Ewart ("The Influence of Parental Age on Offspring," Eugenics Review, October, 1911) that children born at an interval of less than two years after the birth of the previous child, remain, even when they have reached their sixth year, three inches shorter and three pounds lighter than first-born children.