ESSENTIAL FEATURES 



107 



door 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. 



Sunlight in Summer 



Stcnlz^h^ clIZ o/" the jyear^ 



Tfo direct- Sunlight 



Fig. 66. — Floor of standard mulfiplo-unit !a\inK liou.'je 

 at different seasons, sun elevation 



showinK Hi'itribution of sunlight 

 it 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. 



