Modern American School Buildings Volume 3; Being a Treatise Upon, and Designs For, the Construction of School Buildings (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 Excerpt: ...from the ground; these inlets are connected so that, whatever way the wind may be, a supply of pure, cold air is always assured. I have thus far spoken only of winter heating and ventilating; for summer ventilation I believe there are no better inlets for the air than the windows. There are many devices that may be arranged in them that are simple and effective. It is not necessary to describe them here. The outlets, however, need a brief description; it is intended not only to use the outlet under the platform, but by a simple device the incoming register for warm air in winter is made to connect with the main outlet in summer, so that two outlets are provided during the warmer months. The up-going current in the ventilating-shafts is maintained in summer, as well as in winter, by heat; there being placed at the bottom of each shaft a stove, which is to be used constantly when the boilers are not in use, insuring an equally strong up-current in winter as in summer. I would say in conclusion that many interesting experiments have been made and important facts established. These experiments have principally been made with a model of about one sixth the capacity of the schoolrooms. They have always resulted most satisfactorily, and have proved to the writer the correctness of the principles herein advanced against the objections commonly raised that heat brought into the room on the inner walls will not sufficiently warm the outer walls. He would say that in every test yet made the registration of carefully-graded thermometers has been from 1 to 2 warmer near the outer wall than near the inner, showing conclusively that the flow of heated air is rapidly towards cool surfaces, and that if its volume is as it should be it will counteract the cold radiating from...