288 



BUILDINGS, SANITATION, AND DISEASES 



plates, -straw can be shoved in through the opening, filling in 

 the peak of the roof, and making the building warmer. As 

 shown by the dotted lines, the ventilator shaft is run down to 

 near the floor to draw out the foul air and moisture. 



?'- a" 



Fia. 68. End view of farrowing pen. . 



The roof may be shingled, or made of boards with battens 

 over the cracks. The batten's are not shown in the drawings, 

 except in the end view of the roof* 



Outside, the pen is single boarded with battens over the 

 cracks. Inside, tarred paper may be put on the studding and 



