The secondary schools are either state or communal. The state schools are provided with grounds, buildings, and equipment by the communes in which they are located; the remaining expenses are met by state grants, tuition fees, etc. The expense of maintaining communal schools falls largely upon the communes. The state furnishes one-third of the salaries in both classes of schools, and all additional amounts paid to teachers because of long service. While most of the secondary schools charge regular tuition fees, all of them have funds which supply free scholarships to a number of pupils each year. In some communes they have been able already to provide free middle schools, and it appears at least possible that all state and communal schools may sometime be free. The aim in financing the school system is to equalize the burden of expense as far as possible, and to recognize, at the same time, the efforts of those directly concerned. In order to obtain the best results, authority has been strongly centralized; school boards, communal and county councils, and state officials exercise large discretionary powers. VI. BUILDINGS AND GROUNDS The school buildings of Norway are justly reputed to be the most magnificent, best located, and finest edifices of the country. They are built of substantial materials according to attractive architectural designs, and are provided with liberal equipment. The larger buildings are usually constructed of stone, brick and stone, or brick and cement; while the smaller ones are built of lumber and stone. In the erection of buildings, great care is exercised to make them spacious and permanent. All materials used are selected because of their durability and suitability to purpose. In order to guarantee the best hygienic conditions, the law provides that buildings must meet the approval of experts in hygiene before they can be used for school purposes. This means that the services of these experts must be secured in getting out designs for school buildings, whether in the erection of new or the remodeling of old ones. The school buildings are heated by furnaces or stoves. The newer ones are modern in every respect and, of course, have excellent heating systems. Those which have done service for several decades are usually heated by stoves. The buildings are divided into rooms in such a manner that the daylight nearly always enters from the left or the rear of the pupils when they are seated at their desks. This rule is disregarded only in rare cases. During the short days of winter it is essential to provide artificial light. In cities and large towns they use electricity for lighting the school buildings; in the country or in small towns, where the municipalities do not maintain any central lighting plant, various devices are installed. Sometimes gasoline is used and again ordinary oil lamps are common. An abundance of light of the best procurable quality is generally provided.