The tenacity of Tinea tonsurans of the scalp in children at asylums and hospital wards due to the intimate character of contact among them furnishes difficult problems to the general practitioner as well as to the dermatologist. While in charge of the skin wards at the New York City Children's Hospital for mental defectives at Randall's Island, New York, I learned that these problems are still greater at institutions for the feebleminded, where frequent recurrences and reinfections from uncured or newly admitted patients decidedly interfere with the complete eradication of the disease. Mentally low grade children, idiots or imbeciles, have the habit of tearing caps and bandages off their heads and smearing ointments mixed with morbiferous products over their own and other children's faces, hands, clothing and furniture, some of them even eating and licking the salve, so that in spite of strict supervision conveyance of infectious material cannot be