The amount of air breathed by farm animals, as given by King, is 

 placed in the first division of the table below. The second division 

 shows the quantity of fresh air that must pour into a room where ani- 

 mals are confined in order to provide substantially pure air, or that 

 which does not contain over 3.3 per cent of air that has been previously 

 breathed. 



AIR BREATHED BY ANIMALS AND AIR REQUIRED FOR GOOD VENTILATION 



The table shows that the horse breathes hourly 142 cubic feet of air 

 and daily about 3,400 cubic feet, which weighs about 272 pounds. To 

 provide the horse in confinement with air not more than 3.3 per cent of 

 which has been previously breathed, there must hourly pass into the 

 room not less than 4,296 cubic feet, or over 103,000 cubic feet each 24 

 hours. 



The cow gives off about 19 therms of heat each 24 hours, or enough to 

 raise 79,603 cubic feet of dry air from degrees F. to 50 degrees F. The 

 proper ventilation for the cow requires that about 85,000 cubic feet of 

 air be brought into the stable each 24 hours. This is only a little more 

 air than the natural heat from her body will raise from degrees F. to 50 

 degrees F., which is a desirable winter temperature for cow stables in 

 cold climates. 



The King system of ventilation should be installed in every stock 

 barn. This system not only furnishes fresh air for the stock, but the 

 natural heat of the animals in the barn during extreme cold weather will 

 keep the temperature moderately warm if the circulation of air is per- 

 fect. 



DAIRYING 



DAIRYING is a feature in Better Farming the importance of which 

 the farmer cannot afford to ignore. History does not record an 

 instance, if properly conducted, where dairying has not proven success- 

 ful from every viewpoint. 



1. The dairy cow maintains in a great measure the fertility of the 

 soil. 



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