As a consequence, psychotherapeutical treatment directed specially to the subject's mental condition is scarcely necessary. The plans adopted to inhibit inopportune motor manifestations will prove of value for psychical imperfections. Education might almost be considered a species of prophylactic treatment, intended to obviate the possible development of tics. Bourneville has verified this statement in his experience at Bicêtre: Gymnastic exercises, and other measures directed towards the development of the child's faculties, ought to be conducted with kindness and gentleness, and by the aid of boundless devotion and patience the methods of the authorities are bearing unexpected fruit every day. We are convinced that the infrequency of tic in such as have reached puberty is attributable rather to the zealous application of a sound pedagogical method than to anything connected with the age and physical development of the child. Results that steadfast and patient nurses and teachers are obtaining in an institution like Bicêtre may surely be obtained by the physician in his private practice, if the parents of a youthful candidate for tic would appreciate the importance of discipline and unite, intelligently and assiduously, in the task of education. How common it is to find them solicitous only of loading his tender brain with learning, instead of endeavouring, with all their mind and heart, to restrain deplorable bad habits that may one day blossom into tics, to the distress of all concerned! The physician's earliest duty is to warn the parents of the dangers of indifference, and thereafter to install himself as teacher, if the disease should manifest itself in spite of his precautions. He has no choice in the matter, and he should have the frankness to say so, indicating at the same time on what his convictions rest. He need have no fear of damaging his professional prestige by the simplicity of his methods. Let him not promise what he may not be able to perform; encouragement, not deception, must be his watchword. Along these lines lies his duty as a physician; there, too, will he find that his treatment will be fraught with success. APPENDIX