154 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



off at least a barrel of water a day. Now, unless soiT:<^- means 

 is provided for removing that, a barn would be too moist f^^ 

 healthful human being or animals to live in. 



Then, again, tests have been made which show that in the 

 breath given off by the animal there is contained from three to 

 five percent of carbon dioxide, a deadly poison, and if not re- 

 moved the air which is re-breathed is going to be charged more 

 and more with that poisonous gas. By tests made it has been 

 shown that as many as 922 gallons of this gas are given off by 

 an animal in a day. 



Now these are facts that have been discovered by recent 

 scientists who are devoting their time to these problems, and 

 perhaps we little realize the importance and the value of atten- 

 tion to these things, for as one travels through the country you 

 find very few bams of the old type that have been remodelled 

 to conform to these two points of Agricultural Engineering, that 

 is — remodelled to provide a sufficient amount of light and so as 

 to have a good ventilating system in it. 



Now a condition in which an animal has to live that is in- 

 jurious to its health will impair its efficiency — that is true of us 

 and it is just as true of a dairy cow. So, if because of lack of 

 light, or lack of ventilation the health of the animal is impaired 

 to any degree, it will, to the same extent, lessen the efficiency of 

 that animal as a milk producer, but in addition to that, it has 

 been proven that not only the health of the animal is impaired 

 but that the period during which that animal can be productive 

 on a profitable basis is shortened. 



For all of these reasons you see, it is quite important for 

 us, since these other matters have been practically disposed of, 

 to take up the matters of proper construction and equipment, as 

 well as the proper arrangement of our barns. Unless we do this 

 we may be losing here nearly all that we gain by having pure- 

 bred stock, by breeding the herd up, by feeding them systemati- 

 cally. In other words, to give the animal the best chance of do- 

 ing her best for us as a producer, we need to pay attention now 

 to this end of the dairy business and those who are doing so are 

 finding good results, and those neglecting ir are losing some of 

 the profits which they might obtain. 



Again with reference to the arrangement of the barn so as 



