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 indicated on the 

 plan, and each window carries four lights 16 x 20 inches. 



Troughs. Fig. 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 curb next to the pen is 5 inches high, the trough 

 being about 18 inches, wide, outside measurement. The front of 

 the pen is set in 6 inches from the outside of the trough, leaving 

 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 system 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 



