the yield pf milk showis an increase of from .7 to 1.9 quarts per 

 day, as compared with that of the preceding period. This change 

 for the better was noticed when, ten pounds of hay and thirty-four 

 pounds of carrots were used, under otherwise corresponding circum- 

 stances, as a substitute for five pounds of hay and twenty-nine pounds 

 of corn ensilage ; the amount of dry vegetable matter contained in the 

 hay fed with roots, and in the hay fed with corn ensilage was practi- 

 cally the same in both instances. The feed of the sixth feeding per- 

 iod containing carrots as an ingredient is thus the most nutritive and 

 also the most expensive. 



The total cost of the feed consumed for the production of milk is 

 lowest wherever corn fodder or corn ensilage have replaced in the 

 whole or in part English hay, under otherwise corresponding circum- 

 stances. 



The net cost of feed consumed for the production of one quart of 

 milk during the various feeding periods varies as widely as from .34 

 cts. to 1.6 cts. in case of the same cow. The net cost of the feed is 

 obtained by deducting 80 per cent, of the value of the fertilizing con- 

 stituents it contains. 



The manurial value of the feed consumed during the entire feeding 

 experiment, deducting 20 per cent, for the amount of fertilizing con- 

 stituents lost in the production of milk, is at current market rates in 

 every instance more than equal to one-third of the original cost ot 

 the feed. 



Two cows gained from 60 to 66 pounds in live weight during the 

 trial ; and one, the best milker, Dora, held practically its own from 

 beginning to end. 



For further details see the following pages. 



