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. 



8'~ 0"- 



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. 



