144 Missouri Agricultural Report. 



not all of the difference shown in these experiments can be fairly 

 attributed to difference in age, because the older cattle were un- 

 doubtedly fatter at the close of the experiment than were the 

 younger ones, as is clearly shown by the increased price at which 

 they sold, at the same time there is a definite relation between the 

 cost of gain and the age of the animal. 



Fig. 9. A part of the breeding herd of the Agricultural College. It is entirely feasi- 

 ble to make calves from such cows into baby beef. 



For example, taking the average of all the Ottawa experi- 

 ments, it is shown that the cost per hundred pounds of gain was 

 as follows: 



Calves 



Yearlings 



Two-year-olds. . 

 Three-year-olds . 



$4.22 

 5.31 

 5.62 

 6.36 



In the case of the Kansas results, the rank in cost of gain was 

 as follows : 



Calves 



Yearlings 



Two-year-olds. . . 

 Three-year-olds. 



$4.01 

 4.64 

 5.44 

 5.95 



Thus, in the case of the Ottawa experiments, as between calves 

 and three-year-olds, for example, the difference was $2.14 per hun- 



