. L'éclairage des salles d'école; un manuel pour les conseils scolaires, les architectes, les surintendants et les enseignants. Figure 1.—le point X est le plus proche de l'obstruction du bâtiment. Les fenêtres du rez-de-chaussée destinées à éclairer les salles d'école peuvent proch sans yioler le premier principe d'éclairage. Tanee du sol marécageux ou de l'eau stagnante, thatit devrait être bien drainé, sur une légère élévation ifpossible, sans bruits et odeurs dérangeants, Et que le sol ne devrait pas être fait meulé de matière de déchets, il y a encore la question de savoir si LA SÉLECTION DU SITE 11 il est assez grand pour donner un buildin

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. The lighting of school-rooms; a manual for school boards, architects, superintendents and teachers. FiG. 1.—The point X is the nearest to the obstructing building thatground-floor windows intended to light school-rooms can ap-proach without yiolating the first principle of lighting. tanee from swampy ground or stagnant water, thatit should be well drained, on a slight elevation ifpossible, free from disturbing noises and odors, andthat the soil should not be made ground filledwith refuse matter, there is still the question whether SELECTION OF THE SITE 11 it is large enough to give a building of the proposedsize unobstructed light. It is plain that obstructions will interfere most withground-floor rooms; but, as these are the most valuableotherwise, it has been assumed in general throughoutthe book that the ground floor is to be used for school-room purposes. It has also been assumed on hygienicgrounds that no basement rooms are to be thus used.. Fig. 2.—Point X is nearest approach to obstruction allowable underthe rule. Aside from the length and breadth of the building, the amount of land necessary to secure unobstructedlight depends on the proximity and height of thesurrounding buildings erected or to be erected. Ithas been found that neighioring buildings shouM hedistant not less than twice their height from a school-iuilding. (See Pig. 1.) It can be shown mathemat-ically (see Appendix I) that the observance of thisrule will make it possible for each child to see the sky 12 THE LIGHTING OF SCHOOL-ROOMS from his desk, if the school-building does not departmaterially from approved standards. It has been gen-erally accepted on empirical grounds that where thesky can be seen from each desk the light either is ormay. be sufficient. This rule as to the nearness of anadjacent building may be qualified, however, so as torefer only to the sides of the school-buildings wherethere are windows; and it is equally obvious that the Fig.cu31924031435666

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