There is only one way to prevent these types from becoming a menace. Restrain them while they are still developing; keep them from becoming free agents in the community they menace. Types continually come up in the Children's Society and the Children's Court. They are carefully studied. From the actions of the child, from his parents and family history, from the frequency with which he repeats some offense particularly pleasing to him, and by virtue of psychological tests and careful medical examinations the examiners are able to pick out children who should receive scientific care and treatment. "The characteristics of the feeble-minded are usually deceiving. One expects to find them with low brows and furtive looks and more or less vicious in appearance after they develop criminal tendencies. One would[41] expect them to show stupidity at a glance. On the contrary, they are sometimes bright on the surface, amiable, good-tempered under trying conditions, and almost likeable for their external social side. This is particularly true of the high grade defectives. The lower order may be taciturn, gloomy and retiring, and these traits may be noticed almost from infancy. But as they grow up their social nature may be developed, and they too may give the appearance of amiableness. One notable thing about them is their pose of frank innocence. In this they are engaging, and almost convincing. "The street type that makes a gangster is practically the same if cruder in development. These children usually exhibit absolutely no sign of affection for their parents, no sympathy, and are notably cruel toward animals. One boy we had in the Children's Society persistently killed all the dogs and cats his family kept. Finally, when they ceased keeping the animals he got at the canary cage and killed the bird by pulling the feathers out singly. He had no compunction about lying, and looked you right in the eye when he lied. Otherwise he was charming and natural." While moral insanity is hereditary, yet it can be produced in one generation. An alcoholic man with clean antecedents may leave tainted descendants. The only way to combat these conditions in the city is to have strict registration of all feeble-minded and insane. The state should discover them, examine them through public officials, and segregate them. Not only physicians, but school teachers and officials in public institutions should detect them. There should be in each state an institution for feeble-minded delinquents.