The author of Rip Van Winkle has his hero awaken from the long sleep, an old man. The writer does not violate in fiction our conception of the uniform advancement, in human growth and development, from infancy to old age. So uniform is growth in children that we associate in our minds rather definite sizes and mental conditions with certain years from birth. Dress patterns are made for a three or an eight year old girl. A shoe merchant can usually select correct shoes for your boy if he is told the age. There is not great variation from the average age of the majority of the pupils in any particular grade of the common schools. I find that the age of learning to walk, cutting the first tooth, of speaking words and forming sentences is comparatively uniform among healthful children of the same class.
Proceedings of the Iowa Academy of Science
©1906 Iowa Academy of Science, Inc.
Clarke, James Frederic
"The Disparity between Age and Development in the Human Family, Illustrated by Pronounced Cases Due to Thyroid Malformations.,"
Proceedings of the Iowa Academy of Science, 13(1), 257-260.
Available at: https://scholarworks.uni.edu/pias/vol13/iss1/39