PIGGERIES AND PIG PENS. 



161 



vation of the manure pits, and the boarding up of their 

 sides. 



" Fig. 37, is the ground plan. There are four pens 8 x 10, 

 two 6 x 10, and two 6x12. The troughs all open into the 

 center area, and are opened by swing posts, which expose 

 them to the attendant for cleansing or filling, or to the 

 swine for feeding, as may be desired. The two large bins 

 at the sides of the entrance door are filled with dry earth, 

 with which the pigs are treated to the luxury of the earth- 



.f 



Fig. 37. GROUND FLAN OP OGDEN FARM PIGGERY. 



closet to the great improvement of the air of the build- 

 ing, and of the manure. The floors of the pens are made 

 of 2-inch planks, 6 inches wide, laid with 1-inch openings 

 between them, which secures the immediate passage of 

 the urine to the pits below, and the gradual working 

 through of the dry manure, mixed with earth. In the 

 center of the open floor stands a Prindle steamer, whose 

 7-inch smoke-pipe discharges into the middle of a 12-inch 

 galvanized iron ventilator, whereby efficient ventilation is 

 secured. The food is cooked in pork-barrels, which may 



