Note 845 — BOOK VII.835 MAN, HIS BIRTH, HIS ORGANIZATION, AND THE INVENTION OF THE ARTS.
John Bostock translation
He alludes to the gradual induration of the bones of the head which takes place in the young of the human species, and imparts strength to it. Aristotle, in his Hist. Anim., states the general opinion of the ancients, that this takes place with the young of no other class of animated beings.