DOORS AND WINDOWS 



49 



sion of the sash. The window can thus be opened 

 readily, but when closed no cracks are left unstopped. 

 With sashes hinged in this way, the windows of poul- 

 try houses may be opened during the warmer and 

 sunnier portions of the day, giving almost the same 

 conditions as are found in open scratching sheds, but 

 without the inconveniences of the latter. 



FIG 6l : DOUBLE WINDOWS 



No farm building more greatly needs double win- 

 dows in winter than the poultry house, but there is the 

 trouble of securing proper "airing out" of the house 

 on pleasant days in winter, where double windows are 

 used. A double window that can be opened and then 

 closed tightly against the entrance of wind is shown 

 in Figure 6i. The top and bottom are fitted to pieces 

 of wood of such shape and fitting that air cannot enter. 



