If one illustration is better than ten lessons, if an open window is worth more than all that text-books have to say about ventilation, if a seat adjusted to the child is better than an anatomical chart, this does not mean that instruction in hygiene should cease. On the contrary, it means that provision should be made for every teacher to open windows, to adjust desks, to use the experience of individual children for the education of the class. If the rank and file of teachers have not hitherto been sufficiently observant of physiological and hygienic facts, if they are unprepared from their own lives to detect or to furnish illustrations for the child, this again does not mean that the child should be denied the illustrations, but that the teacher should either have instruction and experience to incite interest and to stimulate powers of observation, or else be asked to give place to another teacher who is able to furnish such qualifications. 5. _Children, like adults, can be interested in other people, in rules of conduct, in social conditions, in living and working relations more easily than in their own bodies._ The normal, healthy child thinks very little of himself apart from the other boys and girls, the games, the studies, the animals, the nature wonders, the hardships that come to him from the outside. So true is this that one of the best means of mitigating or curing many ailments is to divert the child's attention from himself to things outside of himself that he can look at, hear, enjoy. The power to concentrate attention upon oneself is a sign either of a diseased body, a diseased mind, or a highly trained mind. To study others and to recognize the similarity between others and oneself is as natural as the body itself. Teachers are consulting this line of easiest access to children's attention when they honor children according to cleanliness of hands, of teeth, of shoes. Human interest attaches to what parks or excursions are doing for sickly children, how welfare work is improving factory employees, how smallpox is conquered by vaccination, how insurance companies refuse to take risks upon the lives of men or women addicted to the excessive use of alcohol or tobacco.