408 Journal of Agricultural Research vol. xx, No. 6 



The production of carbon dioxid by dairy cows is very large because 

 of several factors, among others the high metabolism of the animal itself 

 and the conversion of carbohydrate into fat, which of itself results in a 

 large splitting off of carbon dioxid (so-called "atypical" carbon dioxid). 

 While the cows are not given any exercise when in the barn they are 

 very energetic during feeding periods, striving to gather in every particle 

 of food. At other times they are, for the most part, extraordinarily 

 quiet and placid. 



It is clear from the table that even in this modern barn there is a large 

 percentage of carbon dioxid in the air. That the presence of this amount 

 of carbon dioxid has, for two decades, had no apparent influence upon 

 the health of the animals is worthy of special notice. The excellent 

 health of the animals in this barn leads us to believe that what is true of 

 men is likewise true of animals — that is, that carbon dioxid per se, even 

 in percentages 8 or 10 times the normal percentage, has no serious effect 

 upon the animal itself. 



