. Ventilation for dwellings, rural schools and stables. ingle straight-away outtakes which avoid all anglesand render possible the strongest draft. one of these U-shaped outtakes would answer, located nearthe center of the stable. A still better and perhaps the best practicable arrange-ment of the outtakes is represented in Fig. 55 where eachshaft is straight and rises directly through the roof andabove the level of the ridge to be fully out of the zone of aircurrents which tend to produce down drafts. In the next illustration the outtakes are straight but oc- Ventilation of Dairy Stahles. 115
. Ventilation for dwellings, rural schools and stables. ingle straight-away outtakes which avoid all anglesand render possible the strongest draft. one of these U-shaped outtakes would answer, located nearthe center of the stable. A still better and perhaps the best practicable arrange-ment of the outtakes is represented in Fig. 55 where eachshaft is straight and rises directly through the roof andabove the level of the ridge to be fully out of the zone of aircurrents which tend to produce down drafts. In the next illustration the outtakes are straight but oc- Ventilation of Dairy Stahles. 115 cupy positions against the outer walls. Here they are Ussin the way but they must be projected farther above theroof and are more unsightly as well as being where the ani-mal heat is less efficient. In barns already built, and es-pecially if the animals are few and a cupola exists, this planmay be safely adopted with the modification that the out-takes may be carried up to the roof inside and allowed tostop there or be turned toward or to the Fig. 56.—Showing straight-away outtakes placed against the wall. In Fig. 57 the arrangement differs from that of Fig. 55in having the lower ends of the outtakes against the outerwall, thus removing them from between the cows. There isanother partial advantage to offset the loss due to greaterlength and angles. If the under face of the outtake alongthe ceiling is made of galvanized iron the warmest air of thestable will come continually against it and thus keep it warmto assist in forcing the draft. AVhere there is a lean-to stable, as represented in Fig. 58, 116 Ventilation. the outtake may be constructed inside the main barn andterminated as represented, or it may be carried under theroof to the cupola or to the ridge. If only a few animals are
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