Health in the school, or, Hygiene for teachers / by J.S.C. Elkington.

  • John Simeon Colebrook Elkington
Date:
1907
Catalogue details

Licence: In copyright

Credit: Health in the school, or, Hygiene for teachers / by J.S.C. Elkington. Source: Wellcome Collection.

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    tional results obtained will be greatly improved. This has been tested by actual experiment, and is no mere hypothesis. So far we have only considered those means of air- supply in which the air is made to enter and leave the room without the help of machinery and is not artificially warmed. These simple agencies—as opposed to me- chanical systems of air-supply, where the air is artificially forced into and drawn out of a room at a regular rate after previous warming or cooling—are, however, the only ones available in the great majority of rural and colonial schools. They cannot be expected to do more than to keep the air sewage from accumulating to a hurtful extent, and arrangements depending solely on them are liable to be upset at times by changes of wind, by a still atmo- sphere, and by other causes. Nevertheless, with intelli- gent attention and management, they are capable of being made to yield good results even in a crowded school-room. Without common-sense management the most carefully planned arrangements may be rendered useless and even harmful. For reasons which will be readily understood the whole question of ventilation is closely associated with that of heating, and certain ventilating stoves and other simple devices for the supply of warmed air in winter will be referred to later [Appendix I]. The great fault of natural ventilation by unwarmed air lies in the fact that if we change the air of a room more than three times per hour in cold weather, unpleasant draughts are produced. If the children have only ioo or 120 cubic feet of space per head (as in most standard schools in English countries), it is obvious that to give each 2500 cubic feet of air per