416 



AGRICULTURAL ENGINEERING 



Dimensions. A farrowing pen should contain from 40 

 to 140 square feet of floor. A common size is 8 by 10 feet. 

 Stock hogs should have 6 to 12 square feet of floor, varying 

 with their age. A farrowing pen usually has an outside pen, 

 also, having an area of from 128 to 160 square feet or more. 



Fig. 263. Front elevation of the "A" type of colony or portable 

 hog house. (After Wisconsin Exp. Sta. ) 



The cubic feet of air space per hog is not taken into consider- 

 ation. Portable or individual hog houses are usually 6 by 8 

 feet or 8 by 8 feet. 



When ventilating flues are provided, about 8 square inches 

 of cross-section should be provided for each grown animal. 



