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New York AGRICULTURAL EXPERIMENT STATION. 189 
the cost of the ration and supplied 36.2 per cent. of the digesti- 
ble nutrients. The forage represents 21.7 per cent. of the cost 
of the ration and supplied 40.9 per cent. of the digestible 
nurients. 
From July 1 to 15, inclusive, oat-and pea forage was fed morn- 
ing and noon, and clover hay at night. The same grain was fed 
as during the preceding period. The grain represented 53.6 per 
cent. of the cost of the ration, and supplied 38.7 per cent. of the 
digestible nutrients. The forage represented 22.8 per cent. of 
the cost of the ration, and supplied 37.4 per cent. of the digestible 
nutrients. 
For the 15 days preceding May 16 the ration had -been the 
same as it wasfrom May 16 to May 31. The cows gained in 
weight from 8 to 11 pounds on the average during each of the 
first three periods. During the fourth period the loss in weight 
per cow is rated at from four to five pounds, although this loss is 
only estimated from the total loss during July, the cows not 
having been weighed until the 25th, after corn silage and alfalfa 
- forage had been again fed. 
The greatest amount of organic matter was in the ration for 
the Mand period, when the largest amount of alfalfa was fed, and 
the cost of the ration was somewhat the lowest. The ration con- 
tained the largest amount of digestible protein and the nutritive 
ratio was the narrowest, that of 1:4.7. The cost of food for 
weight of milk produced was lowest during the third period and 
the cost of fat the highest. The greatest amount of digestible 
fat was contained in the ration for the second period and the most 
fat was produced in the milk. Thecost of fat produced was 
lowest during the second period. During the third period the 
forage supplied a larger proportion of the digestible nutrients 
than during any other period —that of 40.9 per cent. — although’ 
the cost of the forage was but 21.7 per cent. of the cost of the 
ration. The grain at this time supplied but 36.2 per cent. of the 
digestible nutrients and Bat gar 54.5 per cent. of the cost of 
the ration. 
For the first period the greatest daily average milk yield wag 
92.1 pounds and the smallest 11.5 pounds; the highest average 
per cent. of fat was 5.45 and the lowest 2.88 per cent. For the 
