VENTILATING A BARN. Systems of ventilation are in demand for large barns, without putting on the common roof ventilators, which are often a nuisance on account of the sparrows and insects. This nuisance may be almost entirely avoided by screening the openings of the ven tilator just the same as for the windows in a residence. As for ventilation from the stable part, this may be accomplished as shown in Fig. 146. It is simply done by boarding up the space between two studdings, boxing out at the cor nice to clear the plate, and finishing with turret effect on the roof, with screened openings on all sides. The interior openings should be as shown, provided with slide shutters. One of these vent shafts should be placed about every eight feet, or opposite every other stall.
Fig. 147 illustrates, at the right, a type of basement window which has given good satis faction. It being impossible to raise the base ment windows on account of the main sill just above them, the frames are made as shown. This allows the window to be opened by drawing top of sash back onto the pieces at Fig. 146. How to Ventilate a Stable.

ta,ched to frame and floor above, which will give ventilation without a direct draught; or sash can be raised as far as floor will allow. Some times the side jambs are made wide at the top, so that there is no opening at the sides, when the window is open; but this is not necessary unless the window is close to the live-stock.
A gable window is shown also, in Fig. 147, at the left. It is hung just above the center Figs. 147 and 148. Barn Gable and Basement Windows.

with sash bolts, and can be opened and closed with cords running to some convenient place, as not everybody likes to climb to the peak of a high barn when it is empty, to open or close windows.