Apart from the preceding cases, the best that can be done is to treat the symptoms. The two principal agents at the disposal of the doctor are the bromides and hydrotherapy. Unfortunately, if the bromides are undoubtedly efficacious in certain cases of epilepsy, that is far from being the case in simple want of mental balance, in which cases they are at best useful adjuvants. As to hydrotherapy, and especially cold douches, their principal indication is in certain nervous affections, where their effect is to enable the subject to master the emotional reactions which are habitually exaggerated. Lastly, the doctor can exert his moral influence to assist the educative work of the teacher in the special school. His less frequent intervention, the different motives of his advice, will often give him even more authority than the teacher. The suggestive effects of his intervention should be obtained, in our opinion, without resort to hypnotism. =3. Does the Mentally Defective suffer from any Definite Illness?=--If the illness such as we have referred to affects those parts of the cerebral cortex which govern the muscles of a limb, one will find, in addition to the mental condition, paralysis with atrophy and contracture. But in addition to such very marked cases, there exist others in which sensory or motor affections, although slight, may hinder the progress of education. It goes without saying that if a child does not profit from the school work, an examination of his sight and hearing should be made as a matter of course. Perhaps that may have been done already by the teacher himself by such methods as he is able to use. But this first examination is not sufficient. The doctor must correct, as far as possible, the want of acuity noticed. No doubt the defect may not explain the mental deficiency of the child, but one must take care that in the school for defectives a pronounced myopia or catarrh of the middle ear does not prove an obstacle to the efforts which are to be made to bring about development. In the same way it must be considered whether the condition of the muscular system is such as to permit the manual work which one wants to teach the child, and whether there exists any paralysis or tremor which would prove an obstacle to work of this kind. One must consider whether any symptoms present are transitory, like chorea; or permanent, like infantile hemiplegia; and what kind of efforts may be made without risk to the health of the child. Such are the problems which the doctor has to solve. * * * * * In the last place, it is necessary to take into account the coexistence with the mental deficiency of other affections.