EXPERIMENT STATION BULLETINS. 



199 



FIG 3. 



The loft above is about eight feet high at the posts and furnishes an abundance 

 of room for storage of straw, crates, crate materials, overlays, troughs, etc. No 

 meal feed is stored in the loft. In general food stuffs stored in piggery lofts are 

 continually exposed to extremely impure, foul smelling air. 



A system of ventilation was started but still remains incomplete. In this 

 piggery there is an average of one door, one window, and one trap above, for 

 each pen. The traps above are seldom shut and the doors are sufficiently loose to 

 swing. With all these openings we have not yet found an insufficient circulation 

 of air. 



This illustration also shows the ropes and pulleys by which both doors and 

 ventilators are opened and closed from the central alley, there being no doors 

 opening into the pens from the alley. The opening A A from loft show how the 

 bedding is supplied to the pens. 



The Pens and Their Fittings. — Reference to Fig. 1 shows the pens to vary 

 from six to ten feet in width. It also shows that the doors opening into the yards 

 are not all regularly located either in the center or corners of the pens. This is 

 due to the fact that the original openings were utilized and could not be readjusted 

 without completely reconstructing the south side of the building. The doors of 

 all pig pens should be located in one corner; there are two reasons for this, in 



