Duration oj Experiment. 



Each half of the test was preceded by a preliminary period of one 

 week, not included in the above dates. 



Average Daily Rations Consumed l>y Each Cow (^Pounds). 



It will thus be seen that the average daily fodder consumption 

 was exactly the same in both halves of the trial. 



Dry and Digestible Nutrients in Daily Rations {PoJtnds). 



It was assumed that Pratts Food had the same digestibility as the 

 corn and middlings mixture. The two rations contained practically 

 the same amount of digestible nutrients. 



Herd Gain in Live Weight (^Founds). 



With Pratts Food. Without Pratts Food. 



Herd Gain. 12 20 



The above figures simply indicate that during both halves of the 



trial each herd made a very slight gain in live weight. 



Herd Yield of Milk and Milk Ingredients {Founds). 



Character of Rations. 



With Pratts Food. 

 Without Pratts Food. 



Total Milk. 



3048.20 

 2998.07 



Daily 



Yield. 



per cow. 



27.22 

 26.77 



Total 



Solid 



Matter. 



41 1.80 

 403-32 



Total 



Butter 



Fat. 



139-49 

 135-99 



Butter 

 Equiv- 

 alent. 



162.73 

 158.64 



The four cows fed Pratts Food produced during a period of four 

 weeks 50.13 pounds more milk than did the same cows when fed the 

 corn and middlings mixture, being a daily increase of .45 of a pound 

 to the cow. Such results are substantially identical, the slight varia- 

 tions being within the limit of a reasonable experimental error. 



