58 



and quality of the milk, provided we take the lactation period 

 throughout, and that the cows receive adequate nourishment, 

 it is clear that a heavy ration has a much more distinct effect 

 upon the live-weight of the cows than a moderate one, and 

 w r hat is not recovered in the milk is partially recovered in 

 this form. 



(9) The character of the cows has much more to do with 

 determining the quantity and quality of the milk than the 

 actual amount of concentrated food in the daily ration. 



(10) Finally, as the results obtained in these experiments 

 indicate that a larger quantity of concentrated food may 

 be employed with profit early in the lactation period than 

 can be done as the period advances, it seems probable that 

 the most economical method of feeding dairy cows, having 

 regard only to the milk produced, would be to make the 

 ration largely dependant upon the amount of milk the cows 

 yield. 



EXPERIMENT E. 



EQUAL versus UNEQUAL INTERVALS BETWEEN MILKING. 



Object. The object was to test the effect upon the quan- 

 tity and quality of milk of an equal and unequal interval 

 between milking. 



The experiment was commenced on May 7, 1905, the cows 

 used in Experiment D being employed for the purpose, the 

 same cows forming lots I. and II. respectively in both ex- 

 periments. The average amount of milk for the week ending 

 April 25 in Experiment D (Table XV.), was for lot I., 10T 

 pints per day, and for lot II., 110J pints. The average per- 

 centage of butter-fat for the same week was 3'52 for both lots, 

 the morning average being 3*2 also for both lots. There were 

 thus in Experiment E two lots of five cows each, which gave 

 at first nearly the same daily yield of milk, and exactly the 

 same percentage of butter-fat. Any appreciable difference in 

 either the yield of quality of the milk under the new con- 



