In the consideration of school hygiene we will first briefly discuss the school building. Its site should be carefully chosen. It should be reasonably high; the soil should be porous, if possible, and properly drained to insure dryness. The building should not be located near a manufacturing plant or other places where there is much noise, smoke, gases or fumes. The buildings should be plain but artistic, and should by all means be modern, fireproof, substantial and sanitary. The building should be surrounded by sufficient yard room to provide ample playground. There should be plenty of shade but not so many trees that there will be an interference with the sunlight and ventilation of the grounds. Some attention should be given the beautifying of the yards, for it must be remembered that the entire child goes to school—physical, mental and spiritual natures must all be developed. The number of stories a modern school building should have is somewhat of a mooted question; however, it is quite obvious that there are many objections to a building of more than two stories. A two-story building certainly is an advantage and especially is this true when the pupils have to change for their different classrooms. Stairways Stairways should be of ample width, allowing pupils to pass up and down without danger of crowding. The risers should be no more than six inches and the treads not more than twelve inches. Where the pupils are compelled to go from one floor to another several times a day it is much better to have inclines instead of stairs. Corridors The corridors should be wide enough so that the children in passing and repassing will not have to crowd. They should be at least ten feet in width and should be supplied with plenty of doors for exits, ventilation and light and also windows for ventilation and light. When practicable the corridors should be along the north side. This insures sufficient lighting and at the same time does not interfere with the lighting and ventilating of the schoolroom. It is more important that the direct rays of the sun be admitted to the schoolroom than to the corridors. Basement The basement should be well protected from dampness; therefore it should be well ventilated and properly heated, as well as arranged so that the direct rays of the sun may reach at least a part of it. The basement should not be used for classrooms unless it is for machine shops, or workrooms. It should not be used for playgrounds or gymnasium, but may be used for bathrooms and toilets. It should occupy the entire space under the building. The Schoolroom In planning the building it must be remembered that the schoolroom is the unit of the building and therefore must receive primary consideration. The entire building should be a collection of schoolrooms properly arranged.