302 BUILDINGS, SANITATION, AND DISEASES 
The front of each pen is made of iron tubing and in each 
front. is a small door through which the attendant can enter 
the pen. 
Windows.—Windows are numerous, as ludicated on the 
plan, and each window carries four lights 16 x 20 inches. 
Troughs.—F ig. 71 shows a cross-section of a trough which 
is made of cement. The side next to the passage is 10 inches 
high, and the curl next to the pen is 5 inches high, the trough 
being about 18 inches wide, outside measurement. The front of 
the pen is sect in 6 inches from the outside of the trough, Jeaving 
a space of between 3 and 4 inches between the inside edge of 
the trough and the bottom of the front partition, through which 
feed can be put into the trough. 
Open Shed.—<At right angles to the main building there is 
an open shed which is used to house the breeding sows, and which 
faces the southeast. This shed is 16 x 36 feet, with a shed roof. 
The back of the shed is 6 feet high and the front is 10 feet high. 
The upper half of the front is composed of a continuous row 
of windows and the lower half is open. The shed has an earth 
floor and is kept heavily bedded with straw. The sows can go 
in and out at will and are fed outdoors. 
Suggestions.—The plan of the College piggery could prob- 
ably be improved in several respects, notably in regard to 
the following: 
It. is doubtful whether the ventilation system is adequate, 
and it would be safer to have the King system (see page 297) 
installed in addition to the present method. With this altera- 
tion the ventilation should be satisfactory. The straw covering 
is very useful for absorbing moisture, but for removing foul air 
a more active svstem of ventilation would make an improvement. 
The plan as given does not make any provision for taking 
hogs from the pens into the feed passage, which must lead at 
