57 



XI.), but it is doubtful whether, on the average, this 

 temporary increase is commensurate with the cost of the food, 

 and it is certain that a heavy ration of this description may 

 not be employed throughout the lactation period with economy. 



(2) While it is clear that an increase in the milk yield at 

 first may be caused by increasing the amount of concentrated 

 food, there is a limit, even when the cows are in full milk, 

 beyond which the amount cannot be increased with profit. 



(3) When cows have been milking for some considerable 

 time, and begin to fall off in their yield, an increase in the 

 concentrated food does not check the falling off, except 

 temporarily, if the cows are indoors (Table XV.). When, on 

 the other hand, the cows are turned out to grass, the flow of 

 milk is increased, for at least a considerable time at first, 

 irrespective of the quantity of concentrated food supplied at 

 the same time (Table VI.). 



(4) The food has more direct effect upon the quantity of 

 milk produced than on the quality. 



(5) With regard to the quality generally, provided a 

 moderate allowance of concentrated food is given to the cows, 

 it is doubtful, when all the evidence supplied by these experi- 

 ments is taken into account, whether increasing the allowance 

 has any appreciable influence. 



(6) The morning milk of an average lot of cows, even when 

 they are well fed, may frequently be under the standard in 

 butter-fat, during the earlier part of the lactation period, and 

 an augmented ration of concentrated food causes but little 

 improvement in this respect (Tables III. and XII.). 



(7) As the lactation period advances the percentage of 

 butter-fat in the milk increases independently of the quantity 

 of concentrated food in the ration (Tables VII. and XVI.). 



(8) While it has been shown that there does not appear to 

 be any regular and consistent connection between the 

 amount of concentrated food in the ration and the quantity 



