ESSENTIAL FEATURES 107 



floor of the house should receive the direct rays of the sun at some 

 time during each day (Fig. 66). 



Freedom from Moisture. Three kinds of moisture are frequently 

 present in poultry houses where layers are kept: (1) Atmospheric 

 moisture, (2) condensation moisture, and (3) soil moisture. 



Atmospheric moisture is always bad if the room is poorly 

 ventilated. 



SunM 



Summit* 



&,22 of the ye 



Sunlight 



FIG. 66. Floor of standard multiple-unit laying house, showing distribution of sunlight 

 at different seasons, sun elevation at 10 o'clock. 



Condensation moisture is caused by the moisture condensing 

 from the air and hanging in drops from the roof and rafters. This 

 is sometimes caused by lack of sufficient head room, but more often 

 by insufficient fresh air. A concrete or solid masonry bank wall is 

 very damp, as it acts as a wick, sucking outside moisture through 

 during wet weather. This condition can be corrected by replacing 

 glass sash in the front with muslin, thus insuring circulation. 



