Ventilation 



RIGHT here at the start, get this fact fixed in your mind — that VEN- 

 TILATORS ON YOUR BARN DO NOT NECESSARILY 

 MEAN THAT YOUR BARN IS VENTILATED. 



— and remember this pomt too — that SOME ventilation is not enough ventila- 

 tion. 



Just look at the sallow, sickly people who live in city tenements. They 

 are getting SOME air, but they are not getting ENOUGH. 



Study a map showing where the tuberculosis cases are located — you will 

 find these same tenements, hotbeds of the disease — all because of the lack 



of ENOUGH oxygen—PURE AIR— VENTILATION. 



Just look at yourself with your rugged constitution, strength and vitality, 

 in comparison with the city office man. You can see that some ventilation 

 IS not enough, either for men or animals. 



— as long as you hope to make a cent of profit in the dairying business 

 you will remember this fact — ihat milk and butter fat production depends 

 absolutely) and completely on cow health and vitality. 



So it IS nothing less than a sacrifice of success and profit to supply your 

 barn with anvthmg less than a GREAT ENOUGH QUANTITY of 

 FRESH, PURE, DUSTLESS AIR. 



Every dairyman is constantly studying to supply the proper milk-making 

 ration, yet health and proper digestion depend, first of all, on the adequate 

 supply of fresh air, constantly. 



Every dairyman is on the look-out for cow-tuberculosis — he will go to 

 extremes to prevent it — yet do you realize that the only treatment and cure 

 for tuberculosis is fresh air? That is the way the medical authorities treat 

 people in Sanitariums — make them live out doors! It is the same disease in 

 cows, so you can be sure that abundance of fresh air, the only known cure 

 for tuberculosis, is also the best preventive. The right barn ventilation is your 

 best protection. 



You have made an investment in your barn, and moisture is the one thing 

 that is causing decay through the entire structure, and deterioration of hay 

 and other forage. The moisture laden air breathed out from thirty cows will 

 saturate the air of the barn with one and one-third barrels of water daily, 

 to say nothing about moisture from other sources. Correct ventilation tal^es 

 out excessive moisture. 



That white coating which you see on harnesses, buggy tops and barn 

 beams is ammonia carbonate, formed by the carbonic acid gas from air which 

 has been breathed uniting with the ammonia vapors from manure. It rots 

 everything. Real barn ventilation takes ammonia carbonate out of the barn. 



Don't rest content in the belief that your barn is ventilated. Cupolas 

 and ventilators on top of your barn do NOT mean ventilation inside your 



