
ft 
rat 
RS 
efi 
fat) 
4 


other portions of her food, but such testimony, so far as I know, 
4 is wanting, while the experiments at this station, continued now 
for several years, appear to show that as a whole the several 
cows under experiment actually consume a larger amount of fat 
in their food than they produce in their milk, and it must be 
remembered that they are reasonably well fed, and fairly repre- 
sent their several breeds in milk production. 
Before discussing our own results let us consider the data, so 
__ far as we have it, in connection with the recent ninety-day dairy 
contest between twenty-five selected representatives of each of 
the following breeds: Jerseys, Guernseys and Shorthorns. 
Ninety-day Test at Chicago. 
During this ninety-day test of three breeds of dairy cattle at 
the Columbian Exposition, twenty-five animals of ‘each breed 
having been selected for the purpose, the results obtained even in 
this trial of most carefully selected animals, when the products 
of milk and butter, if not phenomenal, were, at least, far beyond 
the average, there is good reason to believe that all the fat 
recovered in the milk was furnished these animals in the fat of 
the rations fed them without demand being made upon any 
other constituent present in the food consumed by them. 
The Jersey Bulletin of December 20, 1893, gives the Salis 
data concerning the test: 
The columns of per cents of crude fats and of fat digestible, are 
‘obtained mainly from the average given in the Handbook of 
_ American Feeding Stuffs, and as especial care was taken in this 
- important trial to secure the very best of each food fed, it is a 
~ reasonable conclusion that the amount of fat and of other food 
constituents also was larger than these average percentages 
indicate. 

