130 PROFITABLE DAIRYING 



stock we have overlooked, in many cases, the most 

 important matter of all — proper ventilation. As 

 we enter some stables on a winter's morning, 

 after the barn has been closed all night, we are 



Fig. 36. A well- ventilated dairy barn with "twin" stave silos. 



almost stifled by the odors and impurities which 

 fill the air. These must necessarily be very 

 harmful to the animals that are forced to breathe 

 them over and over again. In such stables no 

 provision is made for admitting fresh air or for 

 withdrawing that which has become charged 

 with impurities and robbed of its life-giving 

 oxygen. Oxygen is the one air element abso- 

 lutely necessary to all animal life. We ourselves 

 know only too well the debilitating effect of 

 breathing bad air. The respiratory organs of 



