The body and its ailments: a handbook of familiar directions for care and medical aid in the more usual complaints and injuries . hich is tofurnish us with a constant supply ofpure air for breathing. Ventilation. Air, to be fit forbreathing, should be changed at therate of about two thousand cubic feetan hour for each person. In construct-ing houses, every room should be fur-nished with ventilators, on the systemof base ventilation, which permits ofthe escape of the vitiated air, not fromthe top of the room, but from openingsnear the floor. The open fire-placeacts upon this principle, and, as
The body and its ailments: a handbook of familiar directions for care and medical aid in the more usual complaints and injuries . hich is tofurnish us with a constant supply ofpure air for breathing. Ventilation. Air, to be fit forbreathing, should be changed at therate of about two thousand cubic feetan hour for each person. In construct-ing houses, every room should be fur-nished with ventilators, on the systemof base ventilation, which permits ofthe escape of the vitiated air, not fromthe top of the room, but from openingsnear the floor. The open fire-placeacts upon this principle, and, as is wellknown, is one of the best of windows are the only means forventilation provided in most houses;and as these are closed in stormyweather, and occasion direct draftswhen open, they answer the purposevery imperfectly. A number of inge-nious window-sash ventilators havebeen lately invented and patented,which are permanently fitted to thesash, and supply fresh air in smallWindow Sash Ventilator. currents, without any direct draft, whilethe window itself is closed and securely fastened. A simple, effective,. How to Make a Ventilator of a Window. 61 and non-patented window ventilator may be readily made out of apiece of board the exact breadth of the lower sash. This board isplaced under the lower sash, which is thus raised a few inches, andits upper edge elevated above the lower edge of the upper sash, sothat a current of air passes through the opening so formed, withoutcausing any direct draft. Figure 46 gives a very clear idea of thissimple method of ventilation. A represents the piece of wood, aninch or more in thickness, three inches wide, and the length of thebreadth of the window. If this slip be well fitted, no draft willoccur between it and the sill, or the frame of the sash. D showsthe separation between the lower edge of the upper sash and theupper edge of the lower; and the arrows the perpendicular currentsof air passing in and out of the room, witho
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Keywords: ., bookcentury1800, bookdecade1870, bookidbodyitsailme, bookyear1876
