151 



no farmer who has once observed the results of this method 

 woukl rest easy so long as his barn liquids were allowed to 

 leach away to no purpose. The re-modelled stables for 

 young stock and oxen are fitted with the same self-cleaning 

 grates. When care is exercised in shoeing oxen they soon 

 learn to handle their feet on these grates without tearing 

 off shoes. 



PIGGERY. 



The new piggery containing 60 pens was designed to se- 

 cure dry floors and perfect ventilation. An iron grate, 

 Steward's self- cleaning, 4x4 feet, is inserted in the floor of 

 each pen. Through these grates liquids, manure and foul 

 cold air fall to the cellar below. A steady downward 

 draft can be maintained in cold weather, as air is excluded 

 from the cellar except as it passes through the grates and 

 the circulation is kept up by a foul air lifting shaft which 

 opens (bell shape) 2 feet above cellar bottom at its lowest 

 point and runs up (6 feet square) through the roof of the 

 building. This shaft is heated by an iron smoke pijje, from 

 the boiler fire box, which passes up through the entire 

 length of the shaft. 



In warm Aveather when all the doors and windows are 

 open the air currents are reversed and a strong up draught 

 is maintained tlirough the grate in each pen giving great 

 comfort to the hogs. 



Hot water pipes for heating enter half the pens, so a 

 comfortable temperature can be maintained in winter. 



The cellar floor is made of concrete and pitched 3 feet in 

 the length of the building. 



This incline accelerates the current of cold foul air along 

 the cellar floor towards the mouth of the foul air lifting 

 shaft. It also causes the liquids to gravitate to the low 

 point where a trap and drain pipe lead to an outside tank 

 or compost heap. Experiments will be made to prove the 

 value of liquids thus collected when sprinkled upon grass 

 land. 



