The James Ventilators* 



zc:;^^ AIRYMEN, generally, realize the full importance of pure 

 ^ ^V\ SI'" to the herd, because they know the condition in which an 

 ' i<M 1 unventilated stable is found on a cold morning. 

 "T~TiLiii/ jfe They know the air in such a barn is bad, and that the damp, 

 •HgjP^,^^ frosty barn is an unhealthy place for the cattle. 

 5^ ■ -i^ii^* . .-. ^i) Not only IS such a condition injurious to the stable itself, 

 affecting the walls, rafters, ceiling and equipment, causing wood to rot and 

 metal to rust; but most important of all is the injurious effect of the lack of 

 fresh air on the vitality of the animals. 



Without pure air, they are unable to get the full benefit of their food, the 

 milk production is lowered and the cattle are more subject to diseases, such as 

 tuberculosis and pneumonia. The loss of stock in the United States during 

 one year from tuberculosis alone amounted to fourteen million dollars. 



The dairyman works hard for six or seven months of the year preparing 

 expensive food in the way of hay and grain for winter use. He cannot afford 

 to feed this expensive food during the winter months and fail to provide the 

 fresh air necessary to properly digest this food and turn it into milk. 



A furnace can be filled with expensive fuel, the fire started and a forced 

 draft used, but if the air forced into the furnace does not contain oxygen, the 

 fuel will not burn properly and much will be wasted. 



A similar action takes place in the animal's body and unless oxygen is 

 provided by bringing fresh air into the barn, the animal will waste feed just 

 as the furnace would waste fuel, and the milk production will be reduced. 



To provide fresh air, a good ventilator is necessary — the ventilator is one 

 of the most important items of barn equipment. But the ventilator alone cannot 

 furnish the pure air. 



Ventilation depends on the proper working out of certain scientific rules, 

 and if not correctly done, the system cannot give the best possible results. 



The system of ventilating must vary to meet the particular conditions in 

 each barn or building. 



The information given in this book is of a general nature, the blue prints 

 shown in the fore part being intended merely as examples, and without any 

 thought that they apply to all cases. 



If you purchase James Ventilators, we will, without any extra charge, 

 design a system of ventilation to meet your individual requirements, furnishing 

 blue prints showing the proper size and location of outtake and intake flues, 

 with details of how they should be constructed to obtain satisfactory results. 



* NOTE: Pages 53-77 on Ventilation should be studied before reading this section on the " The James 

 Ventilator." 



