In birth-palsy cases not much can be accomplished in the way of education, beyond the attempt by such means as ordinary gymnastics and lessons in drill and walking offer, until the child shall have reached an age when he is able to comprehend what is being attempted. For the imbecile, idiotic, or backward a training-school is the proper place, where mental and bodily functions may both receive attention and where constant intelligent supervision is available. Many children the subjects of cerebral diplegia are credited with less intelligence than they really possess, partly because they are necessarily backward, and partly because of their difficulty in expressing themselves, the speech-muscles sharing in the disease. These muscles need to be carefully educated, and this might almost be made the subject of a treatise by itself. Each case will require study as to the special difficulties in the way of speech. Some experience most trouble with the vowel sounds, more find the consonants the worst obstacles. Patient practice in forming the sounds soon produce some results; the pupil must be taught, like the deaf mute, to watch and imitate the movements of the lips and tongue. Séguin's books and the numerous special works should be consulted by the physician or parent desiring to pursue these methods to their fullest development. When once the control of muscular movement begins to improve, more elaborate exercises may be set. In speech, if the patients be intelligent, they will sometimes be amused and profitably trained at the same time by the effort to learn and repeat long words or nonsensical combinations of difficult sounds, like the "Peter Piper" nursery rhymes.