“In spite of Harry’s rebellion and loudly expressed fear, he was immediately relieved of one outgrown canine tooth. The effect was almost instantaneous. His whole nervous system seemed to express itself in one sigh of relief.... From that time his improvement has been marked and continuous. His teeth were removed gradually as it was found expedient. Closely associated with this dental condition, and possibly aggravated by it, was an eye weakness discovered at the eye clinic. In order to insure proper treatment, Harry was placed in charge of the social worker of the psychological clinic, who saw that the drops were regularly put in his eyes, accompanied him to the eye specialist, and not only secured glasses for him but accomplished the hitherto impossible feat of making him wear them. “On account of the dental work and the refraction of his eyes, he was not sent back to public school. Through the psychological clinic a private school was found where the boy could receive the intelligent and sympathetic training he needed. His whole demeanour under the private instruction has been that of a normal boy. He has been put upon his honour and trusted in numberless ways, and in every case he has justified the expectations of his teacher. He is now a healthy boy, with a boy’s natural curiosity, with good manners, good temper, with no more than the average nervousness, and with every prospect of taking his proper place in society and developing into an efficient and moral citizen.” A still more remarkable case that has recently come to my knowledge concerns a Cleveland youth who, up to the age of sixteen, had been a model of good conduct. Then, having gone through high school and begun work with a business firm, he suddenly developed thieving tendencies, finally breaking into a post-office, an exploit which earned for him a term in a reformatory. This was so far from curing him that soon after his release he adventured into highway robbery, was caught, and was sent to jail. So sudden and startling had been the change in his behaviour that the Cleveland police authorities were convinced he was not responsible for his actions, and advised his mother to have him committed to an asylum for the insane. Before taking this extreme step she had him examined by a neurologist, Doctor Henry S. Upson, whose careful testing of the boy failed to disclose any signs of organic brain trouble. Dr. Upson noticed, however, that his teeth were badly decayed, and this led him to suggest an X-ray examination, as a result of which it was discovered that the youthful criminal was suffering from several abscessed and impacted teeth.