Note 30 — Chapter I · THE LOWER FORMS OF ABSTRACTION.
Frances A. (Frances Alice) Welby translation
De l’Education des sourds-muets, 2 vol., 1827. Notwithstanding its somewhat remote date, the book has lost none of its interest in this particular. It must also be remembered that institutions for deaf-mutes are far more numerous now than at the beginning of the century, and that the children are placed in them much earlier. Formerly they were abandoned to themselves or instructed very late; in proportion to their age, they presented better material for the study of their development.